Exhibit 99.1

TECHNICAL REPORT and Preliminary Economic ASSESSMENT FOR Biox mill

and heap leach processing at THE Mother Lode PROJECT,

BULLFROG MINING DISTRICT,

NYE COUNTY, NEVADA

Dated: November 21, 2020

Effective Date: October 7, 2020

PREPARED FOR:

CORVUS GOLD INC.

by

QUALIFIED PERSONS:

Corvus Gold Inc.

Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada

Technical Report Effective Date: October 7, 2020

Dated this 21^st Day of November 2020.

Author’s Certificate

Scott E. Wilson

I, Scott E. Wilson, CPG, SME-RM, of Highlands Ranch, Colorado, as the lead author of the technical report entitled “Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada” (the “Technical Report”) with an effective date of October 7, 2020, prepared for Corvus Gold Inc. (the “Issuer”), do hereby certify:

Dated: November 21, 2020

Author’s Certificate

Michael R. Young

I, Michael Young, Mining Engineer, SME-RM of Bayfield, Colorado , as an author of the technical report entitled “Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada” (the “Technical Report”) with an effective date of October7, 2020 prepared for Corvus Gold Inc. (the “Issuer”), do hereby certify:

Dated: November 21, 2020

Author’s Certificate

Adam R. House

I, Adam R. House, Sr. Metallurgical Engineer, MMSA Qualified Professional, of Helena, Montana, as an author of the technical report entitled “Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada” (the “Technical Report”) with an effective date of October 7, 2020 prepared for Corvus Gold Inc. (the “Issuer”), do hereby certify:

Dated: November 21, 2020

AUTHOR’S CERTIFICATe

Richard Delong

I, Richard Delong, Environmental Geologist, SME-RM, of Reno, Nevada as an author of the technical report entitled “Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada” (the “Technical Report”) with an effective date of October 7, 2020 prepared for Corvus Gold Inc. (the “Issuer”), do hereby certify:

Dated November 21, 2020

Author’s Certificate

Deepak Malhotra, Ph.D.

I, Deepak Malhotra, Ph.D., SME-RM, of Lakewood, Colorado. as an author of the technical report entitled “Technical Report and Preliminary Economic Assessment for Biox Mill and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, Nevada” (the “Technical Report”) with an effective date of October 7, 2020 prepared for Corvus Gold Inc. (the “Issuer”), do hereby certify that:

Dated: November 21, 2020

Table of Contents

LIST OF FIGURES

LIST OF TABLES

This report entitled “Technical Report and Preliminary Economic Assessment for Biox Milling and Heap Leach Processing at the Mother Lode Project, Bullfrog Mining District, Nye County, with an effective date of October 7, 2020 and dated November 21, 2020 (the “Technical Report”), describes the mining and processing operations at the Mother Lode Project (“MLP” or the “Project”) located near the community of Beatty in Nye County, Nevada. The MLP is 100% controlled by Corvus Gold Nevada Inc. (“CGNI”), a wholly owned subsidiary of Corvus Gold Inc. (“Corvus” or the “Company”), through federal lode mining claims (Public Lands) administered by the Bureau of Land Management (BLM) of the U.S. Department of the Interior.

This Technical Report considers a revised processing approach at MLP where whole sulphide mineralization would be processed in a tank bio-oxidation mill followed by cyanide leaching (carbon-in-leach (“CIL”)) of the oxidized residue. With this bio-oxidation processing approach, MLP would be a stand-alone mining operation and would not share processing facilities with the North Bullfrog Project as assumed in the 2018 Technical Report (as defined herein). Oxide mineralization would be processed by heap leaching at the MLP site.

This report contains forward-looking statements by Corvus (the “Company”) and the Authors, which are not guarantees of future performance. Actual results are likely to differ, and may differ materially, from those expressed or implied by forward looking statements contained in this report. Such statements are based on a number of assumptions which may prove incorrect, including, but not limited to, assumptions about the level and volatility of the price of gold, the timing of the receipt of regulatory and governmental approvals, permits and authorizations necessary to implement and carry on the Company’s planned exploration and potential development programs; the Company’s ability to attract and retain key staff, the timing of the ability to commence and complete the planned work at the Company’s projects, and the ongoing relations of the Company with its underlying property lessors and the applicable regulatory agencies.

At the MLP, the mining and processing address both the predominant sulphide mineralization, as well as oxide mineralization. With a revised processing approach, the MLP would be a stand-alone mining operation with separate processing plants at both the MLP and the Company’s North Bullfrog Project. Open pit mining would be used to extract the mineralized material and waste materials. The sulphide mineralization would be processed in a plant using tank biological oxidation of the whole mineralization as pre-treatment, followed by cyanide (CN) leaching to extract the gold and silver metals. The oxide mineralization would be placed on a heap leach pad and the gold and silver metals would be leached by CN solutions distributed on the placed mineralization. Pregnant solutions from the heap leach pad would feed a pair of vertical carbon-in-columns (VCIC). The mill circuit would utilize a conventional carbon-in-leach (CIL) circuit for gold and silver recovery following bio-oxidation. Gold and silver from both circuits would be processed in a carbon handling circuit located at the mill, where the activated carbon would be further processed via a desorption and recovery circuit to produce a final doré product.

Highlights of the Technical Report, including the preliminary economic assessment (“PEA”), are listed in Table 1-2 and Table 1-3. Table 1-1 lists the Mineral Resource estimate for the MLP. Mineral Resources are reported according to the CIM Definition Standards of May 10, 2014 (“CIM”). The guidance and definitions of CIM are incorporated by reference in National Instrument 43-101 -Standards of Disclosure for Mineral Projects within Canada of the Canadian Securities Administrators (“NI 43-101”) Mineral Resources are pit constrained in order to estimate the portion of the MLP Resource that demonstrates reasonable prospects of eventual economic extraction. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. There is no certainty that all or any part of the Mineral Resources will be converted into Mineral Reserves.

The basis for the Mineral Resource estimate is a geologic model interpreted by Corvus geologists and constructed in Leapfrog® Software. Geostatistics and estimates of mineralization were prepared by Mr. Scott E. Wilson, C.P.G., SME-RM For the purposes of this study, the previous Mineral Resource estimates for the MLP contained in the 2018 Technical Report was updated to include new drilling performed in 2019 and 2020, and a revised interpretation of geology at the deposit.

Industry accepted grade estimation techniques were used to develop global mineralization block models. The Mineral Resource estimate considered a new conceptual mill processing method which would use biological oxidation of whole mineralization in stirred tanks to oxidize the sulphides, followed by CN leaching of the oxidized material. Heap leach processing of Run-of-Mine (ROM) oxide gold and silver mineralization would be used to process the ROM oxide mineralization. Pregnant solutions bearing the dissolved gold and silver metal would be recovered on activated carbon processed through an ADR to produce a doré on-site for sale at spot market prices.

The total Mineral Resource estimate at the MLP is listed in Table 1-1 with reference to processing requirements. The applicable cut off grades are indicated for the individual processing approaches in Table 1-1.

Table 1-1 - Mother Lode Pit-constrained, Measured, Indicated and Inferred Mineral Resources Estimate

(1) The qualified person of the above estimate is Scott E. Wilson, C.P.G., SME-RM.

(2) The Mineral Resources are classified as Measured, Indicated and Inferred Mineral Resources, and are based on the 2014 CIM Definition Standards.

(3) Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.

(4) Mineral Resources are estimated using a gold price of $1,500/oz.

(5) Cut-off grades for mill processing were 0.06 g/t for oxide gold mineralization and 0.400 g/t for sulphide gold mineralization

(6) Numbers may not add up due to rounding.

(7) The effective date of this Mineral Resource estimate is October 7, 2020.

(8) The quantity and grade of reported as inferred Mineral Resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred Mineral Resources as indicated or measured Mineral Resources.

(9) The qualified person knows of no environmental, permitting, legal, title, taxation, socio-economic, marketing, political or other relevant factors that may materially affect the Mineral Resource estimates in this Technical Report.

Coordinates shown on plans and sections in this Technical Report are based on the Universal Transverse Mercator (UTM) North American Datum (NAD) 27 Zone 11 projection in meters unless otherwise specified.

A summary of the current projected financial performance of the MLP is listed in Table 1-2 through Table 1-6. Sensitivities are summarized in Figure 1-1 and Figure 1-2.

The preliminary economic assessment is preliminary in nature, and there is no certainty that the reported results will be realized. The Mineral Resource estimate used for the PEA includes Inferred Mineral Resources which are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as Mineral Reserves, and there is no certainty that the projected economic performance will be realized. The purpose of the PEA is to demonstrate the economic viability of the MLP, and the results are only intended as an initial, first-pass review of the Project economics based on preliminary information.

Table 1-2 - Estimated MLP Production for Life of Mine

(1) Waste adjusted from grade streaming output to balance haul cycle times and equipment demand.

(2) Mill mineralization 91% Measured and Indicated, 9% Inferred; ROM mineralization 84% Measured and Indicated, 16% Inferred

Table 1-3 - Projected Key Performance Parameters from the MLP PEA (Constant $, No Escalation, Constant $1,500 per Ounce Gold Price, after-Royalty and after-Tax)

(1) Cash Cost includes mining, processing, site G&A, refining, and royalties.

(2) AISC is a non-GAAP metric and includes mining, processing, site G&A, refining, royalties, sustaining capital (not initial), and reclamation costs, Corvus’s calculation methodology is listed in Table 22-2 and may differ from that used by other organizations.

(3) Values through Year 9, including 2-year drain down, except as listed.

(4) LOM values for Years 1-8, not including drain down Year 9. Mining rates include capitalized mining in Year -1.

In Table 1-3, Average Cash Cost and AISC are for years 1-3, as well as LOM. Average Cash Cost includes mining and processing costs, plus site general and administrative, refining/transport costs, and royalties, along with a credit for the co-product, silver. All-in sustaining cost (AISC) includes all Cash Costs, plus sustaining capital and reclamation costs. AISC is a non-GAAP production cost metric and is estimated here to provide additional information only. It should not be considered alone and is included here to provide a comparison to the mining industry. It may aid readers in the understanding of the comparative economic potential of MLP, but other companies may calculate it differently. Non-GAAP measures do not have any standardized meaning. The calculations performed here are listed in Table 22-2.

Table 1-4 - Initial Capital Cost Summary

Table 1-5 - Initial Direct Capital Costs

Table 1-6 - Sustaining Capital Costs

Figure 1-1 - Sensitivity of Estimated NPV @ 5% (after-Royalty and after-Tax) for Changes in Cost, Gold Recovery or Gold Price as a Percent of the Base Case at a Gold Price of $1,500 per Ounce, Gold:Silver Price Ratio of 80.0, 85.2% Gold Recovery

Figure 1-2 - Sensitivity of Estimated IRR (after-Royalty and after-Tax) for Changes in Cost, Gold Recovery or Gold Price as a Percent of the Base Case at a Gold Price of $1,500 per Ounce, Gold:Silver Price Ratio of 80.0, 85.2% Gold Recovery

The MLP is located at the northern end of the Bare Mountains in northwestern Nye County, Nevada. The Project covers approximately 3,570 hectares (8,820 acres) of federal lode mining claims located in Sections 10, 11, 14, 15, 22, 23, 26, 27, 34, 35 and 36 of T11S, R47E; Sections 1, 2, 3, 9, 10, 11, 12, and 13 of T12S, R47E; and Sections 6, 7, 8, 9, 16, 17 and 18 of T12S, R48E, Mount Diablo Base and Meridian (“MDBM”). Figure 2-1 shows the Corvus property holdings around the community of Beatty, NV, the properties of other exploration companies in the area, and known occurrences of gold mineralization in the area.

The MLP is accessible by a two- and one-half hour (260 kilometers) drive north of Las Vegas, Nevada along US Highway 95. US Highway 95 is the major transportation route between Las Vegas, Nevada, Reno, Nevada, and Boise, Idaho. Las Vegas is serviced by a major international airport. MLP lies immediately to the east of Highway 95 as it approaches the community of Beatty, Nevada. Beatty is the closest town to the Project with a population of about 1,100 and contains most basic services. Access to the Project area is by a maintained gravel road along the east-west Fluorspar Canyon Road that connects to US Highway 95.

Corvus controls the MLP through a number federal lode mining claims listed in Table 4-1 of Section 4.

The Project lays within the Walker Lane mineral belt and the Southwestern Nevada Volcanic Field (SWNVF). The regional stratigraphy includes a basement of Late Proterozoic to Late Paleozoic metamorphic and sedimentary rocks. Basement rocks are overlain by a thick pile of Miocene volcanic and lesser sedimentary rocks of the SWNVF, ranging in age from ~15-7.5 Ma (Figure 7-1). The pre-Tertiary rocks exhibit large-scale folding and thrust faulting, having been subjected to compressional deformation associated with multiple pre-Tertiary orogenic events. The stratigraphy of the SWNVF is dominated by ash flow tuff sheets erupted from a cluster of nested calderas known as the Timber Mountain Caldera Complex. The southwestern edge of the caldera complex lies approximately 21 km northeast of the MLP (Figure 7-1). The stratigraphy of the SWNVF includes voluminous ash flow tuff sheets, smaller volume lava flows, shallow intrusive bodies, and lesser sedimentary rocks. Many of the volcanic units exposed around the Project include ash flow tuffs that originated from the caldera complex. Other volcanic units are locally sourced outside of the caldera complex.

The Mother Lode deposit model consists of structurally and stratigraphically-controlled disseminated gold mineralization hosted primarily in rhyolite porphyry dikes (Tip) and the Sedimentary Rocks of Joshua Hollow (SRJH). Lesser volume hosts include Paleozoic sedimentary rocks (Psd and Psq), Tertiary volcanic rocks (Tlr), and debris flow breccias (Tox). Mineralization in Tip, SRJH and Tlr is mostly sulphide, but may be oxidized depending on depth. Mineralization in Psd, Psq and Tox is mostly oxide. The current interpretation is that oxide mineralization in Tox is detrital, with mineralized rock having been mass-wasted as scarp breccias into the hanging-wall of the Fluorspar Canyon Fault (FCF). Paleozoic rocks are most commonly mineralized in proximity to dike margins but are also mineralized along subtle non-dike-filled structures and as pseudo-stratiform jasperoid bodies.

Corvus has focused its metallurgical test work on the sulphide mineralization at MLP which forms the majority of the gold occurrence. Diagnostic leach tests have indicated that 32-44% of the gold in sulphide mineralization samples is free milling (cyanide soluble) and that 32%-44% is contained in the sulphide minerals. High recovery of the total gold can be achieved but requires some form of pre-oxidation to increase cyanide solubility.

Oxide gold mineralization also occurs at MLP but forms a smaller portion of the gold resource. Metallurgical tests have demonstrated bottle roll cyanide gold recoveries of 81%-97% on oxide samples. Mining production records from the Mother Lode deposit heap leaching and heap leaching of the Secret Pass deposit in the near-by Daisy Project indicate that gold recovery were >75%.

Corvus metallurgical test work for MLP included feed characterization, mineralogy, whole mineralized material cyanidation, AAO testing, flotation, diagnostic leach testing, comminution testing, gravity concentration, flotation concentrate roasting, pressure oxidation and bio-oxidation. This test work indicated that:

In 2019, Corvus had scoping level test work done to evaluate the potential of bio-oxidation of the whole sulphide mineralization. The same two composited material (Tjvs and Tip1) were oxidized in agitated reactors with mesophilic cells in a nutrient medium. The reactors were maintained at 33ᴼC for 11 days. Cyanide leaching of the bio-oxidation product indicated:

These results indicated that the whole sulphide mineralization at MLP was amenable to bio-oxidation followed by cyanidation of the oxidized mineralization, and that the gold extraction would be significantly higher than flotation/POX cyanidation processing (+91% versus +80%).

The Mother Lode gold deposit contains mineralization at or near the surface that is suitable for open pit mining methods. The method of material transport evaluated for this study was open pit mining using drill and blast techniques and 34 m³ bucket capacity shovels paired with 227-tonne rigid frame haul trucks. Rotary percussion drills would be used to create blast-holes and would be augmented by track dozers, motor graders, and water trucks.

Waste rock facilities would be located near the Mother Lode pit. Mill mineralization would be hauled to a mill stockpile while run-of-mine (ROM) mineralization would be hauled and placed directly on the heap leach pad. Mill tails would be pumped to the tails storage facility (TSF) and deposited within the lined impoundment.

The proposed mining operation would use owner operated equipment. The general site layout, including pits, waste dumps, mill site, ponds, and heap leach pad, are shown in Section 15. It has been assumed that the ROM mineralization would be blasted with conventional blasting method to create material at nominally 100% -102mm (-4 inch) [P₈₀ -84mm (-3.3 inch)].

Mill throughput would be at a nominal rate of 8,200 t/d, equivalent to 2.99 Mt/y with a 7-year mine life. Run of Mine (ROM) heap leach mineralization would be produced at a nominal rate of 13,200 t/d, equivalent to 4.8 Mt/y with a 7-year mine life. Mining would be conducted on a 7 day per week 24-hour per day schedule, 360 days per annum. Peak mining production would be approximately 154,000 t/d. The average LOM stripping ratio is 3.7:1 waste-to-mineralization, based on a 0.06 g/t cut-off for ROM mineralization and a 0.40 g/t cut-off for mill mineralization.

Preliminary pit slope designs have been based on an overall 55° inter-ramp angle.

No pit dewatering was assumed for the MLP because of very limited hydrogeologic data and the relatively dry conditions in the drilling.

Mill process facilities would be located along the western edge of the Mother Lode pit claim boundary, with the leach pad and ponds located due west within the MN claim boundary to the northwest. The location has a substantial area that is topographically favorable for construction. Location of the process facilities is shown in Figure 17-3, and would consist of the mill, mill stockpile, heap leach pad, access roads, ponds, adsorption, desorption and recovery (ADR) plant, mobile equipment yard, offices and warehouse. Access to the site from US Highway 95 would be along the existing road along Fluorspar Canyon, which previously supported the Daisy project mine operation.

The mill would consist of primary, secondary, and tertiary crushers, a fine crushed product storage bin, ball mill, and cyclones for classification. Thickened slurry from grinding would be bio-oxidized and filtered. The solids would be re-pulped and treated via cyanidation in a traditional carbon-in-leach (CIL) circuit. The CIL tails would be detoxified and filtered prior to deposition within the TSF. The carbon from CIL would be treated in a dedicated acid wash, elution, and electrowinning circuit.

The ROM mineralization would be placed on the leach pad and treated by conventional heap leaching methods. The pregnant solutions from both the mill and heap leach would be processed through adsorption, desorption and recovery (ADR) circuit. The carbon from both the mill and ADR would be regenerated and returned to the circuits, and the sludge would be smelted to produce doré.

Process water would be produced from ground water wells located in the northeast corner of the MLP. Historic groundwater wells (MW-4 and PW-2) were constructed in this location and produced water for the Daisy Project mining operation at MLP. Corvus owns the ground water permits and re-completed the two existing water wells and would use them provide water to support exploration activities. Additional water resources for mining at MLP would be obtained from the ground water in the Crater Flats (Basin 229) as development planning proceeds.

A MLP mining Plan of Operations (PoO) would be required to be submitted to Bureau of Land Management (“BLM”) and Nevada Division of Environmental Protection (NDEP)-Bureau of Mining Regulation and Reclamation (BMRR)and would need to be supported by development of an Environmental Impact Statement (EIS). BLM has recently issued updated guidance (Memorandum to Assistant Secretaries, Heads of Bureaus and Offices, NEPA Practitioners, Additional Direction for Implementing Secretary’s Order 3355, From the Deputy Secretary of the Interior, April 27, 2018) on the requirements for preparation of the EIS which controls the time line for issuance of the Record of Decision which represents the delivery of the mining permit. The new guidance specifies a series of 7 steps of baseline characterization and design projected to require approximately 1 year that must be completed prior to the initiation of a 1-to 1.5-year EIS Process Timeline.

Corvus anticipates that 12 months will be required to initiate the project, generate the project definition, define the baseline requirements, complete the baseline characterization, develop the plan of operations, develop the plan of development, specify the level of NEPA required for the project and advance the project design elements to sufficient levels of detail. At that point, the NEPA process would commence to develop the EIS.

Corvus anticipates that the EIS process would require an additional 12-18 months, based on the recently issued Department of Interior guidance. That process requires public comment on the defined project and review by the BLM and NDEP-BMRR, development of a draft EIS, publication of the draft EIS and presentation at public hearings, address and respond to received comments from the public and other agencies, development and public review of the Final EIS. After the acceptance of the Final EIS, BLM would issue a Record of Decision.

At that point, the project permits could be issued, and construction activities could begin. Corvus anticipates portions of the operation could begin within 12 months of receipt of the permits, with mill start-up and preparation of the first phase of the heap leach pad.

The Mother Lode Project (the “MLP” or the “Project”) is an advanced stage surface exploration project comprised of public land consisting of federal lode claims. The MLP is 100% controlled by Corvus Gold Nevada Inc. (“CGNI”), a wholly owned subsidiary of Corvus Gold Inc. (NASDAQ:KOR, TSX:KOR, “Corvus” or the “Company”). The specific Mother Lode claim group is owned by the Mother Lode Mining Co. LLC, which is a wholly owned subsidiary of Corvus. The federal mining claims forming MLP cover approximately 38.6 square kilometers. A map showing the location of the MLP to the southeast of the Company’s North Bullfrog project is shown in Figure 2-1, which also shows the Bullfrog District and the extent of Corvus’ controlled property in the Beatty, Nevada area and the mineral property holdings of other exploration and mining companies in the area.

This Technical Report describes the potential mining operations at the MLP. The mill and heap leach processing facilities to be located at the MLP are designed to treat separately both the sulphide and the oxide gold mineralization. The higher-grade sulphide mineralization would be processed with a bio-oxidation mill and the oxide mineralization would be treated on a heap leach pad. Cyanide leach solutions from each process would be sent to a common ADR plant for final gold recovery. The PEA incorporates recent drilling, geological interpretation and metallurgical data for MLP, developed in 2019 and 2020, in addition to the data developed between 2008 – 2018, which were discussed in the technical report entitled “Technical Report and Preliminary Economic Assessment for the Integrated Mother Lode and North Bullfrog Projects, Bullfrog Mining District, Nye County, Nevada” dated effective September 18, 2018 (the “2018 Technical Report”).

Metallurgical testing in 2019 indicated that high gold recoveries could be obtained from processing the whole sulphide mineralization with stirred tank biological oxidation followed by cyanide leaching. These tests indicated that biological oxidation of the whole sulphide mineralization could allow approximately 10% higher total gold recovery than previous work had indicated for treatment of MLP flotation sulphide concentrates. This processing approach has been incorporated into the project conceptual design for mining operations at the MLP, where a biox mill would process whole MLP sulphide mineralization. Lower grade oxide mineralization from the MLP would be processed by heap leaching. Revised planning for a gravity mill at NBP, to produce a gravity concentrate for the YellowJacket high grade oxide mineralization with heap leaching of blended gravity tail and Run-of-Mine mineralization at the North Bullfrog Project would eliminate the benefit of having a common mill for the North Bullfrog Project and MLP.

Mineralization at the MLP is related to large, low-sulphidation epithermal gold systems hosted predominantly in volcanic units and derived sedimentary units. Gold and silver were discovered in the Bullfrog District in 1904. Production records indicate that more than 110,000 ounces of gold and more than 800,000 ounces of silver were produced through 1921.

The MLP is located in northwestern Nye County, Nevada, in the Bare Mountains near the community of Beatty (Figure 2-1). The Project lies within the Walker Lane structural terrain which also hosted the historic Bullfrog Mine where Barrick Gold Corp. (and predecessor companies) produced about 2.3 million ounces of gold and 3.0 million ounces of silver from 1989 through 1999 (NBMG MI-2000, page 34). The area contains numerous other epithermal low-sulphidation volcanic rock-hosted gold showings that have had limited historic production, as well as the recent and major mining operations at the Bullfrog, Mother Lode and Daisy mining projects.

Corvus controls the MLP through numerous federal lode mining claim holdings.

Figure 2-1 - Map Showing Corvus Controlled Property in the Beatty Area and the Location of the North Bullfrog Project and Mother Lode Project with the Properties of Other Gold Explorers¹

¹Known occurrences of gold mineralization are shown in red.

Corvus requested that this Technical Report be prepared to support the definition of the mining and processing of gold mineralization at MLP as a stand-alone project. Metallurgical testing on MLP sulphide mineralization indicated that treating the whole sulphide mineralization by tank bio-oxidation followed by cyanide leaching would increase gold recovery by +10%. In addition, the planning of a gravity mill at the North Bullfrog Project with final gold recovery by heap leaching the gravity tail material at NBP would be a more economic approach and would eliminate the costly hauling of the YellowJacket mineralization to a common mill site at the MLP.

This Technical Report is based on technical information produced by the Corvus directed exploration drilling program and site characterization information developed in pre-permitting baseline characterization studies conducted between 2017 – 2020. Mr. Scott E. Wilson, C.P.G., SME-RM, Mr. Michael R. Young, SME-RM, Mr. Adam R. House, MMSA QP, Mr. Richard Delong, MMSA QP and SME-RM, and Mr. Deepak Malhotra, SME-RM, were commissioned by Corvus to prepare this Technical Report.

Mr. Scott E. Wilson, (CPG #10965, SME-RM #4025107), an independent qualified person, was the principal author responsible for the overall preparation of this Technical Report, and specifically for Sections 1 through 12, Section 14, and Sections 23 through 27 of this Technical Report. Mr. Wilson visited the Mother Lode Project site on January 16, 2018. Mr. Wilson is independent of Corvus applying all of the tests in Section 1.5 of NI 43-101.

Mr. Michael R. Young, (SME-RM #03594500), an independent qualified person, was responsible for the preparation of Sections 15, 16, 21, and 25 of this Technical Report. Mr. Young visited the Mother Lode Project site on March 3-6, 2020. Mr. Young is independent of Corvus applying all of the tests in Section 1.5 of NI 43-101.

Mr. Adam R. House, (MMSA QP #01498QP), an independent qualified person, was responsible for the preparation of Sections 17, 18, 21, 22, and 25 of this Technical Report. Mr. House visited the Mother Lode Project site on September 3, 2020. Mr. House is independent of Corvus applying all of the tests in Section 1.5 of NI 43-101.

Mr. Richard Delong, (MMSA QP #01471QP; SME-RM #4045773), as an independent qualified person, was responsible for the preparation of Section 20 of this Technical Report. Mr. Delong visited the Mother Lode Project site on April 3, 2017. Mr. Delong is independent of Corvus applying all of the tests in Section 1.5 of NI 43-101.

Mr. Deepak Malhotra, Ph.D. (SME-RM #2006420), as an independent qualified person, was responsible for the preparation of Sections 13, 17, 21 and 25 of this Technical Report. Mr. Malhotra has not visited the Mother Lode Project site due to health and travel restrictions in 2020 related to the novel coronavirus pandemic, and such a visit was not required for Mr. Malhotra’s role in this report. Mr. Malhotra is independent of Corvus applying all of the tests in Section 1.5 of NI 43-101.

All dollar amounts in this document are United States dollars unless otherwise noted.

No other experts were relied upon in the preparation of this Technical Report.

Between 2017 and 2020, Corvus significantly expanded its land position in the Bullfrog district by acquiring the historic Mother Lode property from Goldcorp USA, Inc., staking additional claims in the Mother Lode vicinity, and staking claims between the MLP and the North Bullfrog Project, staking additional claims south and west North Bullfrog, and staking claims in gaps between claims staked by other explorers east and north of the MLP. Corvus’ land position in the Bullfrog District is shown in Figure 2-1.

Mother Lode is located in the northern Bare Mountain area of northwestern Nye County, Nevada. Figure 2-1 shows the boundary defined by public land mining claims. The MLP covers approximately 3,570 hectares (8,820 acres) of federal lode mining claims located in Sections 10, 11, 14, 15, 22, 23, 26, 27, 34, 35 and 36 of T11S, R47E; Sections 1, 2, 3, 9, 10, 11, 12, and 13 of T12S, R47E; and Sections 6, 7, 8, 9, 16, 17 and 18 of T12S, R48E, Mount Diablo Base and Meridian (“MDBM”). A list of the mining claims included in the MLP is provided in Table 4-1. Corvus owns, through its wholly owned subsidiary, Mother Lode Mining Company LLC, the historic Mother Lode property which consists of 13 mining claims (~105 hectares; ~260 acres). The MN and ME claims were staked by Corvus in 2017 and 2018 and are also 100% owned by Corvus. The claims listed in Table 4-1 require the payment of annual fees to the BLM and Nye County Nevada to maintain Corvus’s title.

Table 4-1 - Summary of Federal Mining Claims at MLP

Goldcorp Property Purchase

In May of 2017, Corvus purchased 100% of the historic Mother Lode property by acquiring the Goldcorp Daisy LLC from Goldcorp USA, Inc. Goldcorp Daisy LLC was subsequently renamed the Mother Lode Mining Company LLC, which is a wholly owned subsidiary of Corvus Gold Nevada, Inc. The property consisted of 13 mining claims comprising ~105 hectares (~260 acres) around and adjacent to the historic Mother Lode open pit. Corvus issued Goldcorp USA, Inc., 1,000,000 Corvus Gold Inc. common shares and granted a 1% Net Smelter Royalty (NSR) on any future production from the 13 claims for a gold price up to $1,300 per ounce, increasing to a 2% NSR for a gold price equal to or greater than $1,400 USD per ounce.

All of the public land mining claims at the MLP are administered by the Bureau of Land Management (“BLM”). The mining claims require payment of yearly maintenance fees to the BLM and Nye County (recording fees) of an aggregate of $85,491 (for 2020). These claims give Corvus the right to explore for and mine minerals, including gold and silver, subject to the necessary permits which are described in Section 19.

Corvus has received approval of a Plan of Operations (NVN-096238) for eventual surface disturbance of up to 145 acres, for a phased approach to the future exploration. Phase I of the Plan of Operations currently permits 19.7 acres of disturbance and a surety bond in the amount of $180,678 has been committed by Lexon Insurance Co. to assure the required reclamation.

In addition, BLM has granted Corvus two Right-Of-Way (ROW) permits for MLP access along the Fluorspar Road, connecting the MLP to US Highway 95, and for the operation and maintenance of three existing water wells (MW-3, MW-4 and PW-2) that have historically provided water for the mining operations. These ROW permits (N-99359 for 12.1 miles of access roads, N-99360 for the three existing water well sites) have reclamation obligations in the amounts of $113,000 and $180,200, respectively, which are covered by surety bonds from Lexon Insurance Co.

A Notice-level permit (N-96894) allowing construction of up to 17 drill sites with up to 4.39 acres of surface disturbance at the Willys target area (east of the MLP) has been granted by the BLM to Corvus. A surety bond in the amount of $9,727 has been posted by the Lexon Insurance Co. for future reclamation liability. A second Notice-level permit (N-99731) has also been approved for 4.5 acres of disturbance at the Lynnda Strip claims. A surety bond in the amount of $17,484 has been posted by Lexon Insurance Co. to cover future reclamation liabilities.

The State of Nevada, State Engineer has conveyed historic water resources used for the mining operations in the MLP area to Corvus. Permit 5155, Certificate 13786 has an annual water quantity of 8.07 acre-feet, with point of extraction being the well MW-3. Permit 52847, Certificate 13788 under Permit 88625 has a combined duty of 136.26 acre-feet annually, with the point of extraction being the wells MW-4 and PW-2.

Corvus currently has permits to conduct exploration activities at MLP with the BLM. The permits currently allow approximately 20 acres of surface disturbance on public land, with a currently defined maximum of up to 145 acres. The permit for activities on the public lands is based on an environmental assessment that contains environmental baseline data on wildlife, climate and local physical characteristics.

Reclamation bonds are determined assuming the first phase of the disturbance allowed under the MLP Plan of Operations , the two Notice-level permits and the two ROWs, which currently totals $496,650. Additional permits and increased bonding will be required for the expanded exploration and permitting program outlined in Section 27 of this Technical Report.

None of the authors know of any significant factors and risks that may affect access or title to the MLP, or the right or ability to perform work on the Project. To the extent known, the authors know of no other royalties, back-in rights, payments or other agreements and encumbrances to which the property is subject or environmental liabilities, permits or any other significant factors and risks that may affect access, title, or the right or ability to perform work on the property.

The MLP is accessible from Beatty, Nevada, approximately 2.5 hours’ drive (193 kilometers, 120 miles) north of Las Vegas, Nevada via US Highway 95. US Highway 95 is the major transportation route between Las Vegas, Nevada, Reno, Nevada and Boise, Idaho. Las Vegas is serviced by a major international airport. Beatty is the closest town to the Project having a population of about 1,100 and providing most basic services.

MLP lies approximately 9.2 km east of the community of Beatty, Nevada and is accessed by a maintained gravel road along Fluorspar Canyon. Locally, a network of typically well-maintained dirt roads provides access to most of the area and to the water production wells located near the property.

MLP is in western Nevada’s high desert which receives about 15 centimeters (“cm”) of precipitation per year, mostly as modest snowfall in the winter and thunderstorms in the summer. The average daily temperature varies from a low of 5°C (40.8°F) in January to a high of 27 °C (80.8 °F) in July, peak temperatures can reach 43°C (110°F). Due to the mild climate at MLP, the operating season is year-round, though occasional thunderstorms may prohibit operations for short periods due to safety concerns regarding lightning strikes.

The hills and mountains at MLP are covered with sparse low brush including creosote, four-wing saltbush, rabbit brush and ephedra. The Project is in the Basin and Range province. Topographic relief ranges from 980 m above mean seal level (AMSL) at US Highway 95 to 1270 m AMSL in the flat area surrounding the Mother Lode open pit. Locally, the peaks of the Bare Mountains rise another 180 m about the Mother Lode open pit. Topography varies from low hills and desert plains to locally very steep, rocky and rugged mountains. The elevation of the immediate Project area is nominally 1,270m. Most of the Project is characterized by low hills separated by modest width valleys (Figure 5-1), rising to the southwest and the peaks of the Bare Mountains.

As described in Section 4, Corvus maintains sufficient surface rights to support mining operations; including waste disposal areas, tailings storage areas, heap leach pads and mill sites, subject to necessary permits which are defined in Section 19. Claim blocks may not be contiguous but are in close proximity, Valley Electric Association power is readily accessible with the line running up Fluorspar Canyon , though will require an upgrade and extension, as detailed in Section 18 of this Technical Report, to meet the Project’s requirements, and Corvus has water rights (144 acre-feet) from two existing wells. The towns of Beatty (9.2 km west of MLP), Pahrump (119 km south of Beatty) and Tonopah (140 km north of Beatty) support an ample population for mining personnel.

Figure 5-1 - Photograph looking Southwest from Mother Lode open pit area

The Bullfrog District is informally divided into three subdistricts: 1) Main Bullfrog; 2) North Bullfrog; and 3) Bare Mountain. The MLP is located in the Bare Mountain District. Figure 6-1 shows the Corvus controlled property which extends into all three of the subdistricts, the historic and modern (red) producing mines and the mineral properties controlled by other gold producers and explorers. Gold was first discovered in the Main Bullfrog District by Frank “Shorty” Harris and Ernest Cross on August 9, 1904 at the location of the Original Bullfrog mine (Elliot, 1966). The discovery sparked a rush of prospectors and within a few weeks the district was staked “for nine miles in all directions from the sagebrush flats, including part of the desert to the tip of every summit in sight” (Elliot, 1966). Lincoln (1923) reported that 111,805 ounces of gold and 868,749 ounces of silver were produced in the district between 1905 and 1921. According to Lincoln (1923), the Montgomery-Shoshone mine was the most important mine in the district, operating between 1907 and 1910. A number of other small mines in the Main Bullfrog and North Bullfrog subdistricts contributed to the total reported production.

The Bare Mountain subdistrict, also known historically as the Fluorine district, lies to the south and east of Beatty, Nevada. Gold was first discovered on the east side of Bare Mountain in 1905 (Lincoln, 1923), as prospectors flocked to the Beatty area after the discovery at the original Bullfrog mine. Gold was first discovered in Fluorspar Canyon in 1906 near the Daisy shaft (Papke, 1979). Unreported amounts of gold were produced from a number of small operations around Bare Mountain between 1907 and 1929 (Kral, 1951). Gold prospecting led to the discovery of a number of fluorite vein deposits associated with gold mineralization including the Daisy (or Crowell), Goldspar and Mary mines (Papke, 1979). Daisy was by far the largest fluorspar mine producing 204,508 tons between 1919 and 1986. Fluorspar Canyon was named because of a number of fluorite occurrences in the Daisy area.

Mercury was discovered in 1908 at the Harvey (also known as the Telluride) mine on the northeast flank of Bare Mountain just one kilometer south-southwest of the Mother Lode deposit. The Harvey mine operated intermittently between 1912 and 1943 producing 72 flasks of mercury (Bailey and Phoenix, 1944). Another mercury occurrence known as the Tip Top mine lies along the Flatiron jasperoid just 800 meters southwest of the Mother Lode deposit. The Tip Top mine has no documented production but may have produced up to 100 flasks of mercury. The Harvey and Tip Top mines are known to have gold associated with cinnabar, but no reported gold production. Mercury was later discovered at the Thompson mine in 1929. The Thompson mine is located 5 kilometers northeast of Mother Lode and is reported to have had only minor mercury production (Bailey and Phoenix, 1944).

Ceramic grade high-purity silica was produced at the Silicon mine between 1919 and 1929, located 1.5 kilometers northwest of the Thompson mine (Kral, 1951).

Modern exploration for precious metals in the main Bullfrog subdistrict began as early as 1982, when geologists from St. Joe Minerals Corporation became interested in the Montgomery-Shoshone area. St. Joe Minerals conducted extensive exploration in the area of the Montgomery-Shoshone and Senator Stewart mines, resulting in the discovery of the Bullfrog vein deposit in 1987 (Jorgenson et al, 1989). Several company acquisitions resulted in Barrick Gold Corporation being the final owner and operator of the mine. The Bullfrog mine produced gold and silver from three deposits including: 1) Bullfrog (open pit and underground); 2) Montgomery-Shoshone (open pit); and 3) Bonanza Mountain (open pit). Between 1989 and 1999, the Bullfrog mine produced 2.31 million ounces (“Moz”) of gold and 3.0 Moz of silver (NBMG MI-2000, page 34). The Gold Bar open pit mine, located 4 kilometers northeast of the Original Bullfrog mine, produced a small (unreported) amount of gold in the late 1980’s.

Modern exploration for precious metals in the Bare Mountain subdistrict began in the 1973 when Cordilleran Exploration Company (Cordex) staked claims in the Sterling mine area. Between 1973 and 1977, Cordex discovered and delineated bulk-tonnage sediment-hosted gold mineralization at the Sterling mine (Ennis et al, 2017). In 1978, Cordex leased the Sterling property to Saga Exploration Company (Saga). Saga continued to explore the property, and in 1980 formed the Sterling Mine Joint Venture (SMJV). The SMJV began producing gold in April 1980 (Ennis et al, 2017).

Cordex explored the Paleozoic sedimentary rocks in Fluorspar Canyon starting in the mid-1970’s, focusing on gold mineralization associated with the fluorite occurrences. In 1979, U.S. Borax (Pacific Coast Mines) staked the original BVC claims in the Fluorspar Canyon area. U.S. Borax was primarily interested in uranium but recognized the potential for bulk-tonnage volcanic-hosted disseminated gold mineralization and discovered the Secret Pass deposit in 1981. In 1985, Cordex entered into a joint venture agreement with U.S. Borax, and by 1989 had earned 100% interest in the U.S. Borax holdings, which would become the core of the Daisy mine property (Roscoe Postle Associates Inc., 1995). In 1990-1991, Inter-Rock Gold, Inc., through a series of transactions, acquired an option to earn 100% interest in the Daisy mine property, subject to a 25% back-in right to Cordex. Between 1985 and 1994, Cordex was involved in the discovery and delineation of two new sediment-hosted gold deposits at Daisy South and Daisy West, as well as expanding the Secret Pass deposit. In 1994, Inter-Rock had earned 100% interest in the Daisy mine property through the funding of ongoing exploration, and Cordex (now Rayrock Mines) elected to exercise their back-in rights to hold 25% interest in the property. In 1995, the Mother Lode property was purchased by Rayrock Mines from USNGSJV (Roscoe Postle Associates, 1998) and incorporated into the Daisy mine property. The Daisy mine partnership subsequently consisted of Rayrock Mines as the operator (35%) and Inter-Rock Gold, Inc. as the majority owner (65%). The Daisy mine partnership began mining the Secret Pass and Daisy West deposits in late 1996 and ceased mining operations in late 1999. Inter-Rock sold all interest in the Daisy mine property back to Rayrock Mines in 1998. Gold production from the Daisy leach pad continued into 2001.

Reported modern production of 351,744 ounces from Bare Mountain subdistrict has come from the following deposits: 1) 212,744 ounces produced at the Sterling mine (open pit and underground) between 1980 and 2015 (Ennis et al, 2017); 2) 104,000 ounces produced from the combined Secret Pass and Daisy West open pit mines between 1996 and 2001 (NBMG MI-2000); and 3) 35,000 ounces produced from the Mother Lode open pit mine between 1989-1991 (Weiss, 1996).

Figure 6-1 - Bullfrog District Location Map

Resurgent interest in the Bullfrog District began in 2017, and major gold mining companies, including Coeur Mining, Kinross and AngloGold Ashanti have developed large property positions adjacent to the Corvus properties.

In 1983, shortly after U.S. Borax had discovered the Secret Pass deposit, Galli Exploration (GEXA) prospected and staked claims in the Mother Lode-Joshua Hollow areas east of Secret Pass. In 1985, GEXA drilled 54 shallow holes in the Flatiron jasperoid area along the Fluorspar Canyon Fault. Mineralized intercepts were generally narrow, low grade, and confined to the fault zone. GEXA geologists recommended drilling the pediment area where the Fluorspar Canyon Fault was projected to intersect a northwest-trending range-front fault. The Mother Lode deposit was discovered in 1987 with drill hole ML-59, which intersected 47m (155 ft) of 1.7 g/t (0.049 ounces per ton) gold (Mapa, 1990). GEXA also discovered the SNA deposit under pediment to the south of Mother Lode in 1987.

The Mother Lode deposit was delineated by drilling in 1987 and 1988. In 1988, GEXA formed U.S. Nevada Gold Search Joint Venture (USNGSJV) with U.S. Precious Metals and contract miner N.A. Degerstrom. Mining of the Mother Lode deposit began in 1989. Between 1989 and 1991, the USNGSJV produced ~35,000 ounces of gold at Mother Lode at an average grade of 1.8 g/t Au. The bulk of the gold production came in 1990. Mining ceased in 1991 as oxide reserves were mined-out.

Rayrock Mines Inc. purchased the Mother Lode property in 1995 from the USNGSJV; incorporating the Mother Lode and SNA deposit resources into the Daisy mine property. Rayrock continued to explore the Mother Lode-SNA area through 1997. Rayrock also intended to mine sulphide resources at Mother Lode as a part of their Daisy mine plan but a declining gold price in 1998 prohibited this development. Some mining development was done in the Mother Lode pit between 1998 and 1999, but no separate gold production was reported.

Glamis Marigold Mining Company acquired all of the assets of Rayrock in March 1999, including 100% interest in the Daisy mine property. Glamis continued limited gold recovery from the Daisy leach pad into early 2001. The majority of the Daisy mine property was dropped by Glamis in 2001 and 2002, and the Daisy Project began reclamation work. Glamis retained a small portion of the Daisy Project property including the 13 mining claims covering the Mother Lode mine area. Goldcorp (US) Inc. acquired all of the assets of Glamis Marigold Mining Company in 2006, including the 13 claims at Mother Lode. The Mother Lode claims were transferred into Goldcorp Daisy LLC (a wholly owned subsidiary of Goldcorp (US) Inc.) in 2014. In May 2017, Corvus acquired Goldcorp Daisy LLC from Goldcorp (US) Inc. In 2017-2018, Corvus has staked 436 additional mining claims which comprise the current MLP land position shown in Figure 6-1.

In May 2016, Marigold Mining Company was notified by the BLM that the BLM was closing the Plan of Operations and authorizing a reclamation cost estimate reduction of 100%. In June 2016, Goldcorp Daisy LLC received notification from the Nevada Division of Environmental Protection (NDEP)-Bureau of Mining Regulation and Reclamation (BMRR) that all regulatory requirements for permanent closure of the Daisy mine had been met, and that the Water Pollution Control Permit was terminated. Goldcorp Daisy LLC was relieved of all obligations under Nevada Revised Statutes 445 A and the Nevada Administrative Code 445A. NDEP-BMRR also concurred with the BLM’s decision and terminated the Reclamation Permit 0031 noting that all reclamation and surety liability associated with the permit had been successfully completed.

Sterling Gold Mining Corp (Imperial Metals) began acquiring land and staking open ground in the Daisy-Secret Pass-Mother Lode area in 2005, and by 2007 had assembled a substantial land position at northern Bare Mountain covering all the former Daisy mine property and surrounding Glamis’ small Mother Lode claim block.

The MLP lies within the Walker Lane mineral belt and the Southwestern Nevada Volcanic Field (SWNVF). The regional stratigraphy includes a basement of Late Proterozoic to Late Paleozoic metamorphic and sedimentary rocks. Basement rocks are overlain by a thick pile of Miocene volcanic and lesser sedimentary rocks of the SWNVF, ranging in age from ~15-7.5 Ma (Figure 7-1). The pre-Tertiary rocks exhibit large-scale folding and thrust faulting, having been subjected to compressional deformation associated with multiple pre-Tertiary orogenic events. The stratigraphy of the SWNVF is dominated by ash flow tuff sheets erupted from a cluster of nested calderas known as the Timber Mountain Caldera Complex. The southwestern edge of the caldera complex lies approximately eight kilometers northeast of the MLP, and ten kilometers east of the North Bullfrog Project (Figure 7-1). The stratigraphy of the SWNVF includes voluminous ash flow tuff sheets, smaller volume lava flows, shallow intrusive bodies, and lesser sedimentary rocks. Many of the volcanic units exposed around the MLP include ash flow tuffs that originated from the caldera complex. Other volcanic units are locally sourced outside of the caldera complex.

The Bullfrog and Fluorspar Hills comprise a somewhat isolated structural domain within the Walker Lane, where both pre-Tertiary and Miocene rocks have been subjected to large-scale, W- to WNW-directed, syn-volcanic extension (i.e. down-to-the-west normal faulting and east-tilting of stratigraphy). Extensional faulting was coincident with magmatism and volcanic activity between ~15-9.4 Ma. Hydrothermal alteration and gold mineralization were also episodic through this time period. If present, through-going right-lateral faults of the Walker Lane are poorly exposed in the SWNVF. One possible example of a NW-trending, through-going Walker Lane structure cuts through the historic Silicon and Thompson mine areas to the northeast of the MLP (Figure 7-1). Despite the dominance of caldera volcanism in the region, little or no mineralization is associated with any caldera ring fracture system. Rather, mineralization is typically associated with extensional faults outside of the caldera complex.

Extension is accommodated by the Bullfrog Hills Fault System (BHFS); a complex group of kinematically linked faults that facilitate WNW-directed extension and east-tilted block rotation. The primary structure of the BHFS is the Southern Bullfrog Hills Fault (SBHF). The SBHF is an east-west-trending, north-dipping, district-scale, low-angle detachment fault (Eng et al. 1996). West of Beatty, in the main Bullfrog district, the SBHF separates Proterozoic metamorphic rocks in the footwall from weakly metamorphosed Paleozoic sedimentary and Tertiary volcanic rocks in the hanging wall. East of Beatty, in the Bare Mountain sub-district, the same fault is called the Fluorspar Canyon Fault (FCF, Figure 7-1). The FCF cuts up-section from west to east such that in Fluorspar Canyon it separates Paleozoic sedimentary rocks (footwall) from brittle Tertiary volcanic rocks (hanging-wall). The FCF continues to cut up-section to the east until it eventually separates brittle Tertiary rocks (footwall) from brittle Tertiary rocks (hanging-wall) at MLP. The magnitude of displacement along the SBHF-FCF appears to decrease from west to east across the greater Bullfrog district. The northward dip of the SBHF-FCF generally increases from west to east including: ~20^o north at the Bullfrog mine, 25-30^o north in lower Fluorspar Canyon, 45^o north at the Secret Pass mine, and 55-65^o northwest at MLP.

Secondary structures of the BHFS include large-displacement, NNW- to NNE-trending, moderately to steeply west-dipping, down-to-the-west, normal faults. These faults accommodate the east-tilting of the Tertiary units throughout the Bullfrog and Fluorspar Hills. Hydrothermal alteration and gold mineralization are often spatially associated with these large-displacement faults. Such faults are expected to have listric shapes at depth. The MP fault, which hosts the Bullfrog vein at the Bullfrog mine, is an example of a listric fault. Another example is the Contact Fault, which truncates the north side of the Montgomery-Shoshone deposit. The Contact fault also hosts low-grade mineralization under Rhyolite Valley. The Road Fault at the North Bullfrog Project is the northern continuation of the Contact Fault. Such faults are interpreted to sole into the SBHF-FCF detachment fault at depth.

Figure 7-1 - Regional Geology of the Greater Bullfrog District

The long period of syn-volcanic extension in the western SWNVF between ~15-9.4 Ma (depending on location) includes at least two periods of accelerated extension documented in the Bullfrog and Fluorspar Hills. Connors, et al. (1998) have identified a major period of extension between ~12.7 Ma and 11.6 Ma culminating with the eruption of the Timber Mountain Group ash-flows between 11.6 and 11.45 Ma. Evidence for this period of extension lies west of Mother Lode where the 12.7 Ma Tiva Canyon Tuff is tilted up to 45^o east, but the nearby 11.6 Ma Rainier Mesa Tuff is essentially horizontal. Block rotation of up to 45^o is documented between 12.7 and 11.6 Ma in the Fluorspar Hills. Mineralization at MLP is coincident with the onset of this period of accelerated extension. Connors et al. (1998) postulate a second period of accelerated extension between 11.4 Ma and 10.5 Ma, which resulted in major block rotation, rapid erosion and the deposition of the Rainbow Mountain Debris Flow Sequence. In the Mayflower Basin area, the base of the Rainbow Mountain Debris Flow Sequence is tilted as much as 55^o east, whereas the top of the sequence is tilted only 25^o east. Block rotation of up to 30^o is documented in this area while the Mayflower Basin was filling with debris. In the southern Bullfrog Hills east of Rainbow Mountain, the 11.45 Ma Ammonia Tanks tuff is tilted as much as 70^o east, whereas the base of the overlying Rainbow Mountain sequence is tilted only 35^o east. The block rotation of 35^o is documented in this area between 11.4 and 10.5 Ma. Extensional faulting continued through ~9.5 Ma, with an additional 25^o of eastward rotation of the Rainbow Mountain Sequence. Extensional faulting ceased in the Bullfrog Hills prior to the eruption of the relatively flat-lying 9.4 Ma Pahute Mesa Tuff (Connors, et al., 1998). The 10 Ma age of Bullfrog and Mayflower mineralization and the 9.5-10.2 Ma age of the Eastern Steam-heated Zone at the North Bullfrog Project coincide with the culmination of extensional tectonism in the Bullfrog Hills.

Extensional faulting in the Bullfrog and Fluorspar Hills created fault-bounded sedimentary basins which filled with basement- and volcanic-derived sediments (e.g. the Sedimentary Rocks of Joshua Hollow, the Jolly Jane Formation, and the Rainbow Mountain Debris Flow Sequence). During younger periods of extension, older normal faults in the hanging-walls of large-displacement listric faults may have experienced significant reactivation and subsequent eastward rotation, such that they may exhibit relative reverse displacement.

The stratigraphy of the Fluorspar Hills has been described in pamphlets that accompany published geologic maps by Monsen et al. (1992) and later by Fridrich et al. (2007). The local stratigraphy at MLP has been refined by Corvus based on pit mapping and exploration drilling. Table 7-1 outlines the MLP stratigraphy using map symbols consistent with those used by Corvus at the NBP. Where possible, the map symbols of Monsen et al. (1992) and Fridrich et al. (2007) have been preserved. Brief descriptions of units present in the MLP area are given below. Figure 7-2 is a simplified geologic map of the Mother Lode deposit area.

Due to the position of the main claim block, surface exposures of Paleozoic sedimentary rocks are limited at the MLP (Figure 7-2). The Paleozoic rocks encountered in drilling are differentiated only by lithofacies (Table 7-1). The lithofacies-based units are informally correlated to major Paleozoic units, and interpreted as separated by thrust faults. The most abundant lithology is a thick sequence of light to medium grey massive dolomite (Psd), which correlates with the Silurian Lone Mountain Dolomite (Monsen et.al., 1992). Overlying the dolomite in drill holes and in outcrop south of the Mother Lode pit is a heterogeneous siliciclastic sequence (Psq) dominated by quartzite with lesser dolomitic quartz sandstone, sandy dolomite, and sandy limestone. The Psq sequence is interpreted to be a highly attenuated, dismembered thrust slice including Eureka Quartzite, Antelope Valley Limestone and possibly other Ordovician through Devonian lithologies. The Psq unit structurally overlies Psd along a thrust fault identified herein as the SNA thrust fault (Figure 7-2). Overlying the Psq sequence is another dismembered sequence dominated by black siliceous graphitic argillite with lesser dark grey limestone and dolomite (Pss). Lithologies of the Pss sequence resemble Mississippian and Devonian lithologies exposed in the Joshua Hollow area south of Mother Lode. The Pss sequence is interpreted to be a dismembered thrust slice overlying Psq along a second thrust fault identified herein as the Joshua thrust.

Despite variations in thickness, the Paleozoic stratigraphy described above is recognized consistently in reverse circulation drill holes at Mother Lode. The SNA thrust places older Ordovician rocks over younger Silurian rocks. The Joshua thrust places younger Devonian and Mississippian rocks over older Ordovician rocks. Both thrust faults appear to dip moderately to gently east. Paleozoic sedimentary rocks, primarily Psd, host 18% of the samples >0.2 g/t gold in the Mother Lode assay database.

The age of the platy, silty carbonate rocks in the southeast corner of the Mother Lode pit has been the subject of much debate by previous workers. The well-indurated and variably folded nature of the platy rocks suggests they are older pre-Tertiary rocks. Based on Corvus drilling, the platy rocks overlie Tertiary volcaniclastic and conglomeratic sediments. The current interpretation is that these platy rocks are indeed Tertiary in age and are assigned to the Sedimentary Rocks of Joshua Hollow (SRJH, see Section 7.2.1.2 below). If the platy rocks can be determined through micro-fossil work to be pre-Tertiary, then this exposure would be interpreted as a gravity slide block of older Paleozoic rocks shed into the SRJH basin.

Figure 7-2 - Simplified Geologic Map of the Mother Lode Area

Table 7-1 - Summary of the Stratigraphy of the Mother Lode Property

The Sedimentary Rocks of Joshua Hollow (SRJH) comprise a heterogeneous sedimentary sequence subdivided into five lithofacies units including: 1) older tuffaceous sediments (Tjs1); 2) conglomerate (Tjc); 3) volcaniclastic sandstone (Tjvs); 4) grey welded tuff (Tjt); and 5) fine-grained carbonaceous sediments (Tjs). The stratigraphic order is generally ascending, but the subunits typically inter-finger with each other laterally and are locally repeated vertically. There is substantial lithologic variability in the SRJH between drill holes. The SRJH are collectively up to 150 meters thick in the Mother Lode area. Tjvs and Tjs comprise the bulk of the SRJH sequence and are the only sub-units exposed in the Mother Lode pit. Tjc, Tjvs and Tjs comprise a generally fining-upward sequence deposited in a local Tertiary basin marginal to the ancestral Bare Mountain structural high. The SRJH were originally named by Monsen et al. (1992) for sparse recessive exposures south of Mother Lode in lower Joshua Hollow. The age of the SRJH is unknown, but pre-dates the 14 Ma quartz-porphyry rhyolite dike swarm of eastern Bare Mountain. The SRJH are considered time-stratigraphic equivalents of the Tr1 sediments of Eng et al. (1996) in the southern Bullfrog Hills (>14 Ma). It is possible that the lower SRJH includes sediments as old as Oligocene. All subunits of the SRJH are known to be mineralized at Mother Lode. The SRJH hosts 40% of the samples >0.2 g/t gold in the Mother Lode assay database.

The basal sedimentary sequence includes variegated pink, light green and light brown tuffaceous siltstone, fine tuffaceous sandstone, and tuffaceous-conglomeratic sandstone. When present, Tjs1 lies unconformably on Paleozoic rocks along the basal Tertiary unconformity. Thickness varies from 0-30 meters in drill holes, suggesting the unit was deposited on an erosional unconformity of significant relief or may have been subjected to erosion. Tjs1 is not known to crop out anywhere in the Mother Lode area. Tjs1 is distinctive from the overlying Tjvs and Tjs sub-units, suggesting that it was derived from a different provenance area. Tjs1 may be, in part, a time-stratigraphic equivalent of the Oligocene Titus Canyon Formation recognized elsewhere in the Bullfrog district.

Overlying and interbedded with Tjs1 is a distinctive siliceous to locally calcareous conglomerate unit. The unit includes fine to coarse angular lithic gritstone, gritty pebble conglomerate and coarse pebble to cobble conglomerate. Tjc contains clasts of a variety of Paleozoic sedimentary lithologies including chert, quartzite, dolomite, limestone, sandstone and siltstone. Tjc also contains clasts of Mesozoic granitoid rocks, Tjs1 lithologies, and minor Tertiary volcanic rocks. Where Tjs1 is absent, Tjc conglomerate lies directly on Paleozoic rocks along the basal Tertiary unconformity. Tjc often contains conspicuous rounded, broken, deformed and healed Paleozoic clasts that resemble those found in conglomerates mapped as Titus Canyon Formation elsewhere in the Bullfrog district. Tjc varies in thickness from 0-30 meters, apparently being deposited in channels along an unconformity of significant relief. Because of their inter-fingering nature, Tjc and Tjs1 have been lumped together as a single unit for the purpose of geologic modeling. The combined Tjc-Tjs1 units host 5% of the samples >0.2 g/t gold in the Mother Lode assay database.

Overlying and locally interbedded with Tjc are intervals of fine to coarse, bedded to non-bedded, calcareous and siliceous volcaniclastic sandstone. Tjvs sandstone typically exhibits an equigranular salt and pepper texture as a result of detrital grains of white feldspar, black biotite, minor grey quartz, and small black carbonaceous lithic fragments. Highly irregular rip-up clasts of carbonaceous Tjs up to 20 centimeters are common within the volcaniclastic sandstones. The drilled thickness of individual sandstone intervals varies from <1 to >30 meters. Volcaniclastic sandstone is interpreted as channel-filling debris derived predominantly from Tertiary volcanic rocks. Tjvs is well-mineralized where it exhibits the light grey color of strong illite-pyrite alteration. Tjvs hosts 18% of the samples >0.2 g/t gold in the Mother Lode assay database.

A distinctive light grey welded tuff subunit has been recognized in a few of the northeastern-most drill holes. The tuff is similar in color and composition to the volcaniclastic sandstone but exhibits a welding fabric defined by white flattened pumice clasts. The tuff subunit varies in drilled thickness from 10 to 30 meters. It generally occurs in the lower portion of the SRJH and is expected to thicken to the northeast in future drilling. Tjt is mineralized in every hole that it has been recognized. Tjt may prove to be a significant mineralized marker unit in future drilling. The grey welded tuff currently hosts <1% of the samples >0.2 g/t gold in the Mother Lode assay database.

Fine grained carbonaceous sediments comprise the bulk of the upper portion of the SRJH. Lithofacies include variably carbonaceous, mostly calcareous to locally siliceous, laminated mudstone and siltstone, massive or flaser-bedded water-lain tuff, and variably argillaceous laminated lacustrine limestone (i.e. marl). Carbonaceous sediments are commonly interbedded with lenses of Tjvs volcaniclastic sandstone. The drilled thickness of individual intervals of Tjs varies from 10-50 meters within the SRJH. Some of the highest grades in the Mother Lode deposit are hosted in Tjs carbonaceous sediments. Tjs hosts 17% of the samples >0.2 g/t gold in the Mother Lode assay database.

The Lithic Ridge Tuff is recognized by Corvus geologists as a distinct stratigraphic unit in drill holes and on the north high-wall of the Mother Lode pit. The tuff had been erroneously logged by previous operators as a xenolith-rich porphyritic dacite intrusive phase. The Lithic Ridge Tuff consists of poorly to moderately welded, generally lithic-rich, quartz-biotite-feldspar-bearing ash-flow tuff. Lithic content varies from <5 to 20+%, including common green altered porphyritic dacite clasts and a variety of Paleozoic clasts. The Lithic Ridge Tuff overlies the upper beds of the SRJH along an irregular mixed contact zone, suggesting a significant volume of SRJH soft sediments were ripped-up into the base of Tlr as it was being deposited. The Lithic Ridge Tuff is a well-known regional ash-flow unit of the SWNVF dated at 14 Ma (Sawyer et al., 1994). Tlr is ubiquitously hydrothermally altered, sulphidized and locally mineralized in the Mother Lode deposit area. Tlr hosts 4% of the samples >0.2 g/t gold in the Mother Lode assay database.

Rhyolite porphyry dikes in the Mother Lode area are part of a NNE-trending, west-dipping swarm of hydrothermally altered dikes that intrude pre-Tertiary rocks for over 14 kilometers along the eastern flank of Bare Mountain. The dikes at Mother Lode comprise the northernmost exposures of the dike swarm, and the only exposures known to intrude Tertiary rocks. The dikes form somewhat tabular to highly irregular, discontinuous bodies in both the hanging wall and footwall of the Fluorspar Canyon Fault. Where relatively unaltered, the rhyolite has an aphanitic to granophyric groundmass with phenocrysts of quartz, plagioclase, sanidine, biotite and minor hornblende. Quartz, biotite and plagioclase phenocrysts >5 mm are common. Where intensely altered and mineralized, the groundmass is replaced by a mixture of illite-smectite. Mafic minerals are progressively altered to chlorite and replaced by pyrite in mineralized rhyolite. Feldspars are altered to calcite, illite, or adularia. Rhyolite porphyry dikes have yielded age dates ranging from 14.4 to 13.8 Ma (Weiss, 1996), with an accepted average age of ~14 Ma. An interpretation from new drilling at Mother Lode is that rhyolite dikes intrude the Lithic Ridge Tuff and may have formed a local lava flow overlying the Lithic Ridge Tuff. Dike emplacement and the eruption of the Lithic Ridge Tuff are closely related to magmatic activity at ~14 Ma. Tip is the dominant host lithology at Mother Lode, hosting 33% of the samples >0.2 g/t gold in the assay database.

A second sedimentary sequence has been recognized overlying the Lithic Ridge Tuff. The unit includes limonitic to carbonaceous, siliceous to calcareous, fine volcaniclastic sandstone and siltstone similar to Tjs and Tjvs. North of the Mother Lode pit, the Tys unit varies in thickness from 0 to 10 meters and increases to a maximum known thickness of 70 meters in ML 18-072 west of the pit. Tys is lumped in with Tlr in the geologic model. Tys is not known to be mineralized at Mother Lode.

The regionally extensive Crater Flat Group has been described in detail by Carr et al. (1986). The Tram Tuff (Tct) and Bullfrog Tuff (Tcb) members crop out to the northeast of Mother Lode and in Fluorspar Canyon (Fridrich et al., 2007). Neither tuff has been identified in-situ in the Mother Lode drilling area. The tuffs are similar in texture and composition, both being moderately crystal-rich welded tuffs that exhibit ubiquitous hydrothermal alteration. The younger Bullfrog Tuff has been dated at 13.25 Ma (Sawyer et al., 1994). The Bullfrog Tuff is the primary host unit at the Secret Pass Deposit.

In the Fluorspar Hills, the Paintbrush Group is comprised of two members: the 12.8 Ma Topopah Springs Tuff (Tpt), and 12.7 Ma Tiva Canyon Tuff (Tpc) (Fridrich et al., 2007 and Sawyer et al., 1994). The Paintbrush tuffs are typically reddish brown, aphanitic, phenocryst-poor and densely welded. Paintbrush tuffs are distinctly shard-rich and phenocryst-poor compared to other major ash flow tuffs of the SWNVF. The Paintbrush Group has an exposed thickness of nearly 600 meters north of the Secret Pass Deposit but is not recognized in the Mother Lode area. The contact between the underlying Bullfrog Tuff and basal vitrophyre of the Topopah Springs Tuff is well-exposed on the north high-wall of the Secret Pass Pit.

A substantial thickness of heterolithic debris flow breccia (Toxh) overlies the Tiva Canyon Tuff ~1.5 kilometers west of the Mother Lode deposit. Such breccias in the Mother Lode area are mapped as Tox (i.e. older breccia) by Fridrich et al. (2007). The Tox unit is analogous to younger post-Rainier Mesa debris flow breccia deposits of the Rainbow Mountain Sequence at NBP (see Section 7.2.1.13). Tox is predominantly heterolithic but may locally contain monolithic breccias (Toxm) of rhyolite porphyry, SRJH, Lithic Ridge Tuff, or Crater Flat Group tuffs. Heterolithic debris flow breccias are generally non-bedded, very poorly sorted, and contain sand- to large boulder-size clasts of all older units. Tox exists only in the hanging wall of the FCF, where it unconformably overlies Tp, Tip, Tlr, Tys and SRJH. Tox is interpreted to have been deposited on an angular erosional unconformity of significant relief. Up to 150 meters of Toxh has been penetrated in the hanging-wall of the Fluorspar Canyon Fault west of the Mother Lode pit. Tox is interpreted as mass-wasted scarp breccias and alluvial fan deposits that have been shed off fault scarps, including the FCF, during the period of accelerated extension between 12.7-11.6 Ma. Based on stratigraphic relations, Tox is considered a post-mineral unit at Mother Lode (post-12.7 Ma), but it is also known to contain gold. The distribution of oxide gold mineralization in Tox suggests that the mineralization is detrital in nature, having been mass-wasted off the mineralized footwall of the FCF. Tox hosts 2% of the samples >0.2 g/t gold in the assay database.

The lower part of the Timber Mountain Group includes rhyolitic tuffs and lava flows that are known as the Pre-Timber Mountain tuffs (Tprt) and lavas (Tprr) respectively. These units are undated but occupy the stratigraphic position between the Paintbrush Group (or Tox, if present) and the large volume Timber Mountain tuffs (see Section 7.2.1.15). Tprt consists of light-colored, non-welded to bedded, lapilli rich, pumaceous lithic-rich crystal tuff. Tprt is up to 150 meters thick in the Mother Lode drilling area. Tprt appears to blanket paleo-topography cut on the Toxh debris flow sequence. Tprt was deposited during or just after the period of accelerated extensional tectonism associated with the deposition of Tox. Tprt is not known to be mineralized at Mother Lode but exhibits ubiquitous steam-heated alteration north and west of the deposit.

Tprt represents pyroclastic deposits associated with Tprr rhyolite volcanism. Tprr consists of aphanitic to fine porphyritic, massive to flow-banded, rhyolite lava flows (i.e. flow-dome complexes) at the Twisted Canyon and Sawtooth areas of MLP and at the Spicerite target areas at NBP (see Figure 9-1). The rhyolite varies in appearance from relatively fresh, grey to black, glassy perlite or obsidian, to tan to pale green strongly devitrified zeolitic rhyolite. Tprr is not present in the Mother Lode area.

Regionally there are two large-volume ash flow sheets that comprise bulk of the Timber Mountain Group. These include the 11.6 Ma Rainier Mesa Tuff (Tmr) and 11.45 Ma Ammonia Tanks Tuff (Tma, Sawyer et al., 1994). The Timber Mountain tuffs are typically densely welded, crystal-rich ashflow tuffs, with 15-20+% phenocrysts of quartz, feldspar and biotite. The units can be distinguished from each other by the presence of sphene and bluish chatoyant sanidine phenocrysts in the Ammonia Tanks Tuff. In the Mother Lode area, the Rainier Mesa Tuff directly overlies steam-heated Tprt. The Rainier Mesa Tuff may overlie Tprr or Tp elsewhere in the district. The Rainier Mesa Tuff is sub-horizontal, relatively unaltered, and entirely post-mineral in the Mother Lode area. The Ammonia Tanks Tuff is recognized only at the Sawtooth target area (see Figure 9-1).

Older unconsolidated gravel deposits of late-Miocene to Pliocene age occur at the Willys target area along the eastern range-front area of Bare Mountain, and at the Twisted Canyon and Baileys Gap target areas on the east side of Oasis Valley (see Figure 9-1). The gravels form sub-horizontal terraces that are commonly, deeply incised. Underlying older rocks are often poorly exposed in the bottoms of incised ravines below the terrace gravels. The older gravels at the MLP are correlated to the Gravels of Sober-up Gulch on the west side of Oasis Valley at North Bullfrog Project. The thickness of Tgs is highly variable, but not expected to exceed 100 meters. Monsen et. al. (1992) reports an 8.2 Ma age for a tuff unit within the Gravels of Sober-up Gulch east of Bare Mountain.

The Mother Lode deposit is largely covered with unconsolidated Quaternary gravels. Quaternary gravels range in thickness from 1-20 meters in the Mother Lode drilling area. The Quaternary gravels are variably caliche-cemented and form stable vertical walls in the Mother Lode pit.

The most notable structural feature at the MLP is the Fluorspar Canyon Fault (FCF). The NE-trending, NW-dipping FCF is exposed at the Flatiron target where it hosts an auriferous, cinnabar-bearing, silicified fault breccia (Figure 7-2). The fault breccia is juxtaposed against a massive jasperoid hosted in the footwall dolomite. Drilling at Flatiron indicates a dip of 65^o northwest from the outcrop to 300 meters down-dip. The FCF continues to the northeast from Flatiron for about 700 meters where it intersects a north-trending rhyolite dike-filled structural zone (Figure 7-2). Just before it enters the Mother Lode pit, the FCF is deflected to the northerly strike of the dike-filled structural zone. Displacement along the FCF appears to be transferred to the dike orientation at this structural intersection. This intersection is a vital structural feature facilitating the formation of the Mother Lode deposit. The earliest movement on the FCF clearly post-dates dike emplacement.

The rhyolite dike swarm along eastern Bare Mountain is hosted by structures that exhibit little or no discernable displacement. Displacement on the dike-filled structure just south of Mother Lode appears to be nil as the dike does not offset the SNA thrust (Figure 7-2). However, cross section analysis of the Mother Lode deposit indicates notable displacement on many dike margins north of the intersection with the FCF. Fault gouge on dike margins is a common occurrence in the Mother Lode deposit. The evidence suggests that large-scale displacement associated with the FCF has been transferred to the dike swarm orientation and has reactivated older sub-parallel dike-filled structures north of the structural intersection. Reactivation of dike-filled structures has enhanced porosity and permeability for fluids to ascend around and through the structurally modified dikes. The dike zone widens rapidly to the north of the intersection, and branches into three or more mineralized dikes (Figure 7-3). The subparallel FCF and dike swarm strike northerly and dip 50-70^o west for ~500 meters to the northern limit of drilling. Stratigraphic relationships suggest the main splay of the FCF has 400 meters or more of down-to-the-west normal displacement within the Mother Lode deposit.

Mineralized rhyolite occurs in both the hanging-wall and footwall of the FCF. There is evidence that dikes cut the unconformity, but no conclusive evidence that dikes cut the FCF. Rather, cross section analysis suggests that both footwall dikes and hanging-wall dikes are truncated by the main splay of the FCF (Figure 7-3). The FCF bisects and offsets the large rhyolite body in the Mother Lode pit, where mineralization is only present in the footwall portion of the rhyolite. Elsewhere in the deposit, mineralized rhyolite exists only in the hanging-wall of the FCF (Figure 7-3). The implication is that additional sub-parallel mineralized dikes may be found in the hanging-wall of the FCF west of the known deposit. The FCF apparently dismembers individual dikes as it propagates through the dike swarm in a subparallel orientation. Reactivated older dike-filled structures may be the primary structural conduits for ascending fluids. However, the main splay of the FCF is mineralized at both Mother Lode and Flatiron. Deeper drilling has extended the deposit to the west, where it appears that the FCF plays a more significant role as a high-grade structural feeder. Future drilling will continue to test the FCF as a primary feeder structure at depth to the west.

Figure 7-3 - Cross Section 4084410N Looking North through the Mother Lode Deposit

The timing of the latest movement along the FCF in the Mother Lode area is bracketed by the 12.7 Ma Tiva Canyon Tuff and 11.6 Ma Rainier Mesa Tuff. The Tiva Canyon Tuff is tilted as much as 45^o east in the hanging-wall of the FCF just 1.5 kilometers west Mother Lode. Just northwest of Mother Lode, the Rainier Mesa Tuff is sub-horizontal, exhibiting little or no east-tilting in the hanging-wall of the FCF. The evidence suggests that an accelerated period of extensional faulting and eastward block rotation, accommodated by the FCF, occurred between 12.7 and 11.6 Ma in the Mother Lode area. The onset of this period of extension is coincident with the age of Mother Lode mineralization. Extension continued along the FCF after mineralization at Mother Lode, resulting in un-mineralized hanging-wall rocks being juxtaposed against mineralized footwall rocks. The amount of post-mineral displacement on the FCF is unknown. Structural and stratigraphic relationships suggest that a faulted-off portion of the Mother Lode deposit may exist in the hanging-wall of the FCF at depth to the west.

A major unconformity between Paleozoic and Tertiary rocks appears to have played a role in dike emplacement and the propagation of ascending hydrothermal fluids. The porosity and permeability contrast between the rigid, non-porous Paleozoic rocks and the less rigid, highly porous Tertiary rocks apparently allowed the mineralizing system to open and broaden above the unconformity. Rhyolite dikes appear to expand in width just below and above the unconformity (Figure 7-3). The grade and thickness of mineralization generally increases with proximity to, and above, the unconformity. Gold grade in all mineralized units generally increases with proximity to mineralized dikes. The grade and thickness of mineralization is significantly better adjacent to dikes in the Tertiary sediments above the unconformity.

A large-scale, low-amplitude, north-plunging antiform involving Sedimentary Rocks of Joshua Hollow (SRJH) and the Lithic Ridge Tuff can be observed on the north wall of the Mother Lode pit. On cross sections, the antiform is mimicked by the basal Tertiary unconformity (Figure 7-3). The feature appears to be a large-scale drag-fold in the footwall of the FCF. Bedding in the west limb of the fold appears to steepen to the west and merge with the FCF.

There is evidence of compressional deformation (i.e. folding) within the SRJH in the Mother Lode pit and in core holes. Small-scale, low amplitude folding is interpreted as gravity-related compressional deformation of soft sediments in a rapidly subsiding and filling Tertiary basin during active extensional tectonism.

Mother Lode is characterized as a sediment, intrusive, and locally volcanic-hosted disseminated gold deposit. Mineralization most closely resembles Carlin-type sediment-hosted gold deposits of north-central Nevada. Weiss (1996) was the first to recognize and document the similarity to Carlin-type deposits. Weiss (1996) also cites evidence for a large buried porphyry type magmatic system associated with the rhyolite dike swarm at eastern Bare Mountain. The Mother Lode deposit formed at ~12.7 Ma, which is much younger than the typical ~40 Ma age in north-central Nevada. The nature of mineralization is rather passive and with very low introduction of secondary silica, suggesting it may have formed at a shallower depth and at lower temperature than typical Carlin-type deposits. Mineralization exhibits geochemical associations between Au and As-Sb-Hg-Tl-Te-Bi-F, with very low Ag and base metals.

The Mother Lode deposit model consists of structurally and stratigraphically-controlled disseminated gold mineralization hosted primarily in rhyolite porphyry dikes (Tip) and the Sedimentary Rocks of Joshua Hollow (SRJH). Lesser volume hosts include Paleozoic sedimentary rocks (Psd and Psq), Tertiary volcanic rocks (Tlr), and debris flow breccias (Tox). Mineralization in Tip, SRJH and Tlr is mostly sulphide, but may be oxidized depending on depth. Mineralization in Psd, Psq and Tox is mostly oxide. The current interpretation is that oxide mineralization in Tox is detrital, with mineralized rock having been mass-wasted as scarp breccias into the hanging-wall of the FCF. Paleozoic rocks are most commonly mineralized in proximity to dike margins but are also mineralized along subtle non-dike-filled structures and as pseudo-stratiform jasperoid bodies.

The primary structural control feeding mineralization at Mother Lode is a series of north-trending, 50-70^o west-dipping rhyolite dike-filled structures. Mineralization is both semi-tabular and highly irregular as fluids ascended along dike-filled structures in the underlying Paleozoic rocks, through the Tertiary unconformity, and expanded upward into the Tertiary section. Mineralizing fluids appear to have bled out laterally away from mineralized dikes into favorable permeable lithologies and secondary structures, including the FCF. Deeper drilling has extended the deposit to the west, where it appears that the FCF plays a significant role as a high-grade structural feeder (Figure 7-3). The potential for additional mineralized dikes in the vicinity of the FCF at depth to the west below current drilling is a highly attractive target.

Rhyolite dikes along the entire Bare Mountain swarm were subjected to high-temperature, sanidine- and biotite-stable alteration shortly after emplacement (Weiss, 1996). At Mother Lode, biotite-stable alteration was followed by a lower temperature pervasive illite-smectite-pyrite event that affected both the dikes and surrounding wall rocks. The illite-smectite-pyrite event penetrates well up into the Lithic Ridge Tuff, forming a large sulphidation halo around the gold mineralization. Illite-smectite-pyrite alteration typically exhibits strongly elevated As, Sb and Tl, and may be well-mineralized or only anomalous in gold. The evidence suggests an early relatively barren illite-pyrite event is followed by an overprinting main stage Au-Te sulphidation event.

Trace element geochemistry associated with gold mineralization in drill hole samples includes: As (max 9262 ppm), Sb (max 1429 ppm), Te (max 16 ppm), Tl (max 17 ppm), Hg (max 30 ppm) and Bi (max 25 ppm). The elements with the strongest correlation to gold are tellurium and arsenic. Base metals are very low at Mother Lode. Elevated base metal values are largely associated with basement rocks. Weiss (1996) reports the presence of fluorite veining and a strong association between gold and fluorine at Mother Lode. Fluorine is not included in the multi-element analysis used by Corvus, but fluorite has been identified in the Mother Lode pit. Petrographic studies by Weiss (1996) on sulphide concentrates from drill holes at Mother Lode identified growth zones in pyrite grains exhibiting concentrations of arsenic. Weiss (1996) concluded that the Mother Lode deposit formed at a depth of 500-1000 meters or less, from gold-bearing fluids with temperatures between 200-240^oC. High-grade gold appears to be associated with remobilized carbon, particularly in Tjs and Tjvs in the upper portion of the deposit. Remobilized carbon appears to have accumulated in a blanket-like zone above the upper reaches of the rhyolite dikes.

Jasperoid in Paleozoic rocks appears to have both structural and stratigraphic control. Jasperoid intervals in drill holes commonly contain significant Ag values up to 100 ppm. The average Ag/Au ratio from jasperoid samples is 15:1. The average Ag/Au ratio in non-jasperoid Tertiary rock-hosted samples is <0.5:1. Jasperoid mineralization in Paleozoic rocks may be a separate mineralizing event that predates the main Mother Lode gold system. Jasperoid is typically oxidized and yields high cyanide shake leach recoveries.

Rhyolite dikes along the entire Bare Mountain swarm were subjected to a sanidine- and biotite-stable (potassic), high-temperature alteration shortly after emplacement, as evidenced by secondary hypersaline fluids inclusions in quartz phenocrysts (Weiss, 1996). At Mother Lode, rhyolite dikes and surrounding wall rocks were later subjected to lower temperature, pervasive, illite-smectite alteration and associated disseminated pyrite sulphidation as an early event associated with gold mineralization. This alteration in Mother Lode dikes is progressive in intensity, probably due to proximity to open feeder structures. Biotite goes to chlorite and eventually chlorite gets replaced by pyrite. The groundmass and feldspar phenocrysts get replaced by illite-smectite, calcite and adularia.

Published age dates on alteration minerals from fluorine-related gold deposits in the Bare Mountain area suggest the deposits formed between 12.9-12.2 Ma, more than a million years after dike emplacement. Weiss (1996) reports K-Ar ages of 13.1 and 12.2 Ma on mixed-layer illite-smectite from a mineralized dike at Mother Lode. The average of these dates is 12.7 Ma, which is consistent with an adularia date of 12.9 Ma from a similar mineralized dike at the historic Goldspar mine (Noble, et al., 1991). Stratigraphic relations suggest that the Secret Pass deposit, hosted in the 13.25 Ma Bullfrog Tuff, formed soon after deposition of the 12.8 Ma Topopah Spring Tuff and possibly before the deposition of the 12.7 Ma Tiva Canyon Tuff. Alunite dates of 12.2 and 11.2 Ma from silicified fault breccia at the Flatiron target suggest continued or renewed episodic hydrothermal activity in the Mother Lode area (Weiss, 1996). Alunite dates of 12.9 and 11.6 Ma from the Thompson and Silicon mines, respectively (McKee and Bergquist, 1993), reflect hydrothermal activity similar in age to Mother Lode and YellowJacket (NBP).

Steam-heated alteration is ubiquitously present in the post-mineral pre-Rainier Mesa tuff unit (Tprt), which overlies the Mother Lode deposit. The alteration zone is characterized by thick intervals of pervasive kaolinite-alunite alteration and local low temperature opaline silica replacement of the tuff unit. The Tprt unit and alteration zone are up to 150 meters thick. Steam-heated alteration is also known to affect the upper portion of the underlying Tox debris flow sequence. No significant gold has been detected in rocks affected by steam-heated alteration at Mother Lode, but gold is known to occur with cinnabar and alunite at the Flatiron target and the nearby Telluride mine. The steam-heated alteration may be related to the waning stages of the Mother Lode gold system, but likely post-dates gold mineralization. The age dates suggest episodic hydrothermal activity in the Fluorspar Hills between ~13-11.2 Ma.

Gold mineralization in the Bare Mountain sub-district includes a variety of types: 1) sediment- and intrusive-hosted disseminated Carlin-like (Sterling, Mother Lode, SNA); 2) sediment-hosted Carlin-like (Daisy West and South); 3) volcanic-hosted low sulphidation disseminated epithermal (Secret Pass); and 4) sediment-hosted quartz vein stockwork (Reward). Types 1, 2, and 3 are associated with late fluorite vein mineralization, high As-Sb-Hg, and very low base metals. Type 4 has no fluorite association, very low As-Sb-Hg, and elevated base metals (Weiss, 1996). Most of the gold deposits in the greater Bullfrog district range in age from ~13 Ma to 9.5 Ma. However, quartz stockwork veins associated with the Reward deposit are cut by unmineralized andesitic dikes dated at 26 Ma (Monsen, 1992). The Reward deposit is older and apparently unrelated to the other deposits in the district (Weiss, 1996).

Mineralization at MLP most closely resembles Carlin-type sediment-hosted gold systems of northern Nevada. The Mother Lode deposit model includes structurally and stratigraphically-controlled disseminated sulphide and oxide mineralization hosted in primarily in Tertiary sedimentary rocks and rhyolite porphyry dikes. Paleozoic sedimentary rocks comprise a smaller volume host in proximity to dikes and the basal Tertiary unconformity. Tertiary volcanic rocks and debris flow breccias are also mineralized at Mother Lode. Alteration types associated with gold mineralization include passive decalcification and illite-pyrite alteration. Unique features of Mother Lode-style mineralization compared to typical Carlin-type deposits include: the association with fluorine, the significant volume of mineralization that is rhyolite porphyry dike-hosted, elevated tellurium and bismuth, and the generally passive, innocuous, very low-silica nature of the mineralization. Carlin-type gold deposits are generally known to form at depths of >2 kilometers, at temperatures between 180-240^oC. Mineralization at Mother lode may have formed at depths of 500-1000 meters or less, and at temperatures <240^oC (Weiss, 1996).

Exploration is ongoing at MLP. Exploration at the Project has been conducted using RC and core drilling, geophysics, surface mapping and rock chip sampling.

The focus of the Phase 1-3 drilling programs between 2017-2019 has been to delineate open pit resources at the Mother Lode deposit area. The deposit remains open at depth to the west, north and east of the current limit of drilling, with excellent potential for additional open pit and underground mineable resources. The primary focus of Phase 4 drilling in 2020 has been to extend the Mother Lode deposit to the west and beneath known mineralization. The deeper drilling strategy in 2020 has included casing of reverse circulation pilot holes (pre-collars) and drilling core tails out the bottom. In 2019, a 3D Induced polarization survey was conducted over the Mother Lode deposit area. In 2020, a Titan-160 MT survey was jointly conducted by Corvus and Coeur Mining over a large area including the MLP and Coeur’s Crown Block. Additional exploration target areas on the MLP are shown on Figure 9-1 including: Lynnda Strip, Hidden Canyon, Prospector Pass, Flatiron, Willys, Sawtooth, Twisted Canyon, and Baileys Gap. Each of the exploration targets are described briefly in the follow sections.

The Lynnda Strip target area was staked in September 2018. The ~100-meter-wide strip of MN-claims covers a gap between the Coeur Crown block to the south and the AngloGold Ashanti Silicon property to the North. Coeur Mining discovered significant gold mineralization adjacent to the Lynnda Strip in early 2020. Coeur drilled three holes that crossed onto the Lynnda Strip. Corvus has received the results for one of these holes (CH20-011), which contains broad intervals of low-grade oxide mineralization as well as 1.52m of 9 g/t Au. Corvus subsequently obtained a Notice-level drilling permit from the BLM (N-99731) and began the first phase of drilling on the Lynnda Strip in the fourth quarter of 2020. The new discovery at the Lynnda Strip is completely blind, locally high-grade, and predominantly oxide. In stark contrast to the mineralization at Mother Lode, Lynnda Strip consists of volcanic-hosted vein, stockwork and disseminated mineralization. Drilling is in progress at the Lynnda Strip.

The Hidden Canyon target area was identified, and the Snake claims were staked between AngloGold Ashanti’s Silicon and Transvaal properties in 2020. The target area exhibits high-level, low temperature, volcanic-hosted (Ammonia Tanks Tuff) argillic alteration with late, fracture- and breccia-filling chalcedonic quartz. The alteration is associated with a series of NE- to NNE-trending, vertical to steeply west-dipping fractures. A first pass of 10 rock chip samples yielded detectable gold (6-14 ppb) in two samples. The surface geochemistry is consistent with what would be expected from this style of high-level alteration in the Bullfrog district. The target is to test for blind, Bullfrog-style, vein/stockwork/disseminated mineralization at depth below the surface alteration.

The Prospector Peak target area was also identified during the staking of the Snake claims in 2020. Surface hydrothermal alteration is relatively weak at Prospector Pass. However, a series of NE-trending, low-temperature, crustiform banded quartz veins has been identified on the adjacent AngloGold Ashanti ground. These vein structures project under the Snake claims in Section 21.

9.1.4                    Flatiron

The Flatiron target is located 700 meters southwest of the Mother Lode deposit. GEXA was originally attracted to the Mother Lode area in 1983 because of the gold and cinnabar-bearing silicified breccia along the Fluorspar Canyon Fault (FCF) at Flatiron. The first 54 holes at the original Mother Lode property were drilled at Flatiron by GEXA in 1985. Nearly all of these early holes intersected between 3-15 meters of low- grade gold mineralization (0.5 to 1 g/t, with values up to 5 g/t). Three holes were drilled by Corvus in early 2018 to test the down-dip extension of the known mineralization along the FCF. All three holes (ML18-056, -057 and -058) cut gold mineralization similar to the historic drilling. The style of mineralization at Flatiron is identical to Mother Lode. The Flatiron mineralization is interpreted to be a distal extension of the Mother Lode deposit, and ultimately may connect with Mother Lode mineralized zone at depth and along strike. There has been no follow-up drilling since 2018. The Flatiron target has not been adequately tested, and follow-up drilling is planned for 2021.

The Willys target area is located on the ME claim block, 2 km east of the Mother Lode pit. The Willys target area is underlain by the Sedimentary Rocks of Joshua Hollow (Tjs), the Lithic Ridge Tuff (Tlr), pre-Rainier Mesa Tuff (Tprt), the Rainier Mesa Tuff (Tmr), and the Gravels of Sober-up Gulch (Tgs). There are also small outcrops of altered quartz-porphyry rhyolite dikes exposed beneath Tgs gravels along the west side of the claim block. The dikes appear to be intruding Tjs and Tlr, in a similar setting to the Mother Lode deposit. The first pass of surface rock sampling yielded no significant gold values. Recessive exposures of altered and iron-stained Tjs and Tlr have yielded arsenic values up to 439 ppm. The alteration and trace element geochemistry exhibited in the Tlr unit at Willys is similar to what is exposed on the north wall of the pit above the Mother Lode mineralization. Three RC holes were drilled by Corvus in late 2018. There were no quartz-porphyry rhyolite dikes identified in the drill holes, however, one hole (ML18-96) had significant anomalous gold (up to 98 ppm) associated with sulphidized basaltic dikes. In light of the discovery at Lynnda Strip, the Willys target is being re-evaluated and additional drilling is planned for 2021. The Willys area has excellent potential for discovery of both Mother Lode-style and Lynnda Strip-style gold mineralization.

The Sawtooth target is located 7 kilometers west of Mother Lode on the western portion of the MN claim block in lower Fluorspar Canyon. Geologic mapping has identified the Sawtooth fault: a large-displacement, NNE- trending, down-to-the-west normal fault. The Sawtooth fault juxtaposes Ammonia Tanks Tuff (Tma) in the hanging wall against pre-Rainier Mesa Tuff (Tprt) in the footwall. The fault is largely covered by alluvium. The footwall of the fault also includes exposures of lower Bullfrog Tuff (Tcb) below the Tprt unit. The Tram Tuff (Tct), the Lithic Ridge Tuff (Tlr) and possibly Tjs are all expected to lie at depth in the footwall of the fault. The down-to-the-west displacement on the fault is estimated to be 500 meters or more. Limited rock sampling has identified anomalous arsenic (up to 160 ppm) and antimony (up to 15 ppm) in strongly altered Tcb in the footwall of the fault. The structural and stratigraphic setting is similar to the MP Fault at the Bullfrog mine. The Sawtooth fault is expected to sole into the Fluorspar Canyon Fault just 400 meters south of the MN claim block. The target is to test for blind vein or disseminated gold mineralization in the footwall rocks of the Sawtooth Fault at depth. First pass drilling is planned for 2021.

The Twisted Canyon target area is located 3.5 kilometers west of the Lynnda Strip drill area, and 2.5 kilometers northwest of Mother Lode (Figure 9-1). The area lies along the eastern margin of a feature described by Fridrich (2007) as the Twisted Canyon Topographic Wall. First pass mapping and sampling has yielded a sample with 65 ppb Au and 2.37 ppm Hg associated with high level argillic alteration. The alteration is hosted in pre-Rainier Mesa rhyolite lavas and tuffs, indicating a younger age of alteration and mineralization than Mother Lode. The Twisted Canyon target area exhibits a strong chargeability anomaly paired with a strong resistivity anomaly in the Titan-160 MT survey data. The MT response is similar to the response at Lynnda Strip. Additional field work is required in 2021 to develop a drill target in this area.

Figure 9-1 - MLP Target Location Map

The Baileys Gap target area is located 6-9 kilometers northwest of Mother Lode, just southeast of the Baileys target area in the Eastern Steam-heated Zone of the NBP (Figure 9-1). The entire target area is covered by post-mineral Tertiary tuffs and gravels, including the Spearhead Member of the Stonewall Flat Tuff (7.5 Ma, Sawyer et al, 1994) and the Gravels of Sober-up Gulch (Tgs). The Baileys target area exhibits intense quartz-alunite-kaolinite steam-heated alteration, which appears to extend under cover to the southeast beneath the Baileys Gap area. Corvus believes the Eastern Steam-heated Zone at NBP is contiguous with the large steam-heated alteration zone present at the Silicon mine area to the southeast (see Figure 9-1). Additional work, including geophysical surveys, is required to generate drill targets at Baileys Gap.

The Mother Lode Property was acquired in May 2017, and Corvus reprioritized exploration for the higher-grade mineralization indicated to exist at MLP. Corvus initiated the MLP drilling program in 2017 with fall Phase 1 drilling and Phase 2 drilling in the spring of 2018. Exploration drilling has continued at MLP with a core drill rig and a RC drilling rig operating currently.

The current Mother Lode claim group at MLP was once a part of a much larger claim block. The purchase of the Mother Lode group included the data for 520 drill holes totaling 66,932 meters (219,592 feet). The data included exploration holes and water wells from within and surrounding the current claim block. The first known drilling at the MLP was conducted by Galli Exploration (GEXA). In 1985, GEXA drilled 54 shallow holes totaling 4,371 meters (14,340 ft) along the Flatiron target southwest of Mother Lode. Between 1987 and 1991, GEXA and the USNGSJV drilled 318 holes totaling 40,842 meters (133,964 ft) in conjunction with discovery, delineation and development of the Mother Lode and SNA deposits. The GEXA-USNGSJV drilling included four PQ core holes at Mother Lode and four PQ core holes at SNA. The GEXA-USNGSJV drilling also included six water wells drilled in 1988. Between 1987 and 1997, Cordex/Rayrock drilled 132 holes totaling 19,502 meters (63,984 ft) on the ground surrounding the original Mother Lode property. A significant portion of this drilling was at Mother Lode proper in 1997 after the property was acquired by Rayrock in 1995. The 1997 Rayrock drilling included two PQ core holes at Mother Lode. Rayrock also drilled two shallow water wells (monitor wells) near the Daisy Leach Pad. The existing drilling data from the earlier exploration and production operations has been compared to the results of the Corvus 2017-2018 drilling as part of the data verification program, which is discussed in Section 11. No exploration drilling had occurred in the Mother Lode area for a period of nearly 20 years between 1998 and the fall of 2017.

Starting in September 2017 through July 2018, Corvus has drilled 78 holes totaling 25,823 meters (84,721 ft), including three core holes and 75 reverse circulation holes. All three core holes (ML17-001, 002 and 003) were drilled HQ diameter from the surface. ML17-003 was reduced to NQ lower in the hole when the HQ rods were stuck. The three core holes were drilled early in the program and have been essential to recognizing and understanding the stratigraphy at Mother Lode. Most aspects of drilling and sampling procedures at the MLP are done with the same methodology and quality control developed and used at the NBP since 2010.

Reverse circulation drilling uses 5½ inch downhole hammer bits. Most holes were completed with a hammer bit to depths of up to 440 meters (1445 ft). Tricone rotary drill bits are used to complete those holes that had significant groundwater inflow. Perched water was been encountered in a number of holes. Corvus measures static water level daily as a hole is drilled. Historic drilling at Mother Lode indicated localized, perched water zones, and the Corvus exploration drilling has produced similar information. The data have not demonstrated a predictable static water table. A few of the deeper holes past 400 meters have encountered fracture-controlled groundwater up to 30 gallons per minute. When groundwater is encountered, it is measured by a timed 5-gallon bucket test taken from the discharge at the splitter.

Reverse circulation samples are collected at continuous 5-foot (1.52 meter) intervals starting from the top of each hole. Two duplicate samples for each interval are captured in large sample bags placed in 5-gallon buckets. The custom-made, heavy duty, sample bags have a white barcode tag for the samples going to the assay lab, and a red barcode tag for the duplicate samples being kept for other purposes (field duplicates, metallurgical testing, etc.). The sample hose and rotary splitter are cleaned thoroughly with a high-pressure water sprayer prior to drilling of each 20-foot rod (6.1 meter). In order to minimize contamination between 5-foot intervals, the splitter is also quickly sprayed out after each interval is drilled, but before the sample bags are pulled, without stopping drill penetration. Individual samples bags are tied-off without pouring off the contained water and placed in orderly rows at the drill site for natural decanting of the excess water. The sampling associated with reverse circulation drilling is supervised by an on-site Corvus rig geologist.

Within 3-5 days the samples are sufficiently dry to allow transport. The samples are loaded into super sacks (bulk bags) and transported to a staging area at Corvus’ core shack/field office. Pre-selected blanks and reference standards are placed inside the super sack, and it is sealed with a large, numbered plastic zip-tie. The super sacks are stored in a secure area until they are loaded onto the assay lab truck. The assay lab truck comes to the project for sample pick-ups on an as-needed basis. Chain of custody is transferred to the assay lab personnel at pick-up time.

The drill chips are cursorily logged at the drill site, and later logged in greater detail in an office setting using a binocular microscope. Magnetic susceptibility and an HCL acid “fizz-test” are also measured on the chips for each five-foot interval. The geologic characteristics that are determined routinely on drill chips include: color, lithology and stratigraphic unit assignment, alteration style and intensity, vein type and percentage, sulphide type and percentage, and oxide type and relative intensity. The following five oxide classes are used to quantify the oxidation state of each sample:

Class 1: Unoxidized; total sulphide, no oxide present

Class 2: Mostly unoxidized; sulphide with minor oxide present

Class 3: Mixed oxide/sulphide; generally, both oxide and sulphide in nearly equal proportions

Class 4: Mostly oxidized; oxidized with minor fresh sulphide present

Class 5: Completely oxidized; total oxide; no sulphide present

Oxide classes 5, 4 and 3 have consistently yielded favorable gold recoveries in cyanide solubility tests (see Section 12). Resource model blocks assigned to classes 5, 4 and 3 comprise the oxide mineralization category. Oxide classes 2 and 1 have consistently yielded un-favorable gold recoveries in cyanide solubility tests. Model blocks assigned to oxide classes 2 and 1 comprise the sulphide mineralization category.

Significant intercepts from the MLP drilling between July 2018 and September 2020 are shown in Figure 10-1 and listed in Table 10-1 and Table 10-2. Drilled intercepts are not true widths. No known drilling, sampling or recovery factors have been identified that materially impact the accuracy and reliability of the results. Note, in Table 10-1 reported intercepts are not true widths as there is currently insufficient data to calculate true orientation in space. Mineralized intervals are calculated using a 0.3 g/t cutoff unless otherwise indicated below.

Figure 10-1 - 2018-2020 Corvus Drill Hole Locations at MLP

Table 10-1 - Drill Intercepts for August 2018 to September 2020 Drilling at Mother Lode - Reverse Circulation Holes (not true width)