Corvus Gold Inc. (TSX: KOR) (OTCQX: CORVF) announces it has received additional positive results from its ongoing Main Zone infill and step-out Phase-4 drill program (Table 1). These latest results are from targets designed to infill unestimated parts of the 2018 mineral resource model, to potentially extend the deposit deeper and probe the eastern side of the property (Figure 1). Results appear to be encouraging for expanding the Mother Lode mineral resource as the grade and thickness of the intervals are higher and broader than previously known. In addition, the latest holes have expanded the new oxide Central Intrusive Zone below the Main Zone, although drilling conditions remain difficult upon entering the zone and both holes were terminated prematurely (lost), in the upper part of the CIZ.
Hole ML20-130 (88.4m @ 1.92 g/t Au & 9.2m @ 1.2 g/t Au, lost in the CIZ) was drilled to infill an area of the model between prior holes ML17-013 (NR17-19, Dec 12, 2017, 94.5m @ 1.2 g/t Au hole, ended before CIZ was reached) & ML17-037 (NR18-03, Feb 1, 2018, 12.2m @ 2.69 g/t Au , lost in the CIZ). The new drilling has shown the mineralization in this area is higher grade and has broader width and continuity to the east than previously modeled. The infill holes drilled to date have consistently been adding new mineralized areas to the model as well as upgrading and expanding higher-grade zones, which could have a positive impact on the future mineral resource model update planned for fall of this year.
Similar to the previous hole, ML20-131 (56.4m @1.92 g/t Au & 4.6m @ 1.43 g/t Au at the top of CIZ) was drilled to infill an area with limited drill data between holes ML17-012 (NR17-19, Dec 12, 2017, 29m @ 1.53 g/t Au, stopped before the CIZ) and ML17-019 (NR18-01, Jan 10, 2018, 35.1m @ 1.97 g/t Au stopped before the CIZ). The new results indicate the mineralized zone is broader and higher grade and could be accretive for the new mineral resource model. To thoroughly explore and quantify the new CIZ oxide target, Corvus will be utilizing more core tail type drilling which should increase our ability to get completely through the larger and higher-grade areas of this new zone. Hole ML20-129 (9.1m @ 0.67 g/t Au) was designed to test the eastern boundary of the Mother Lode property where it appears the system is limited in this area, although just east of the property boundary the adjacent owner (Coeur Mining) is pursuing the northern extension of the SNA deposit which lies to the southeast of the Mother Lode property.
Jeffrey Pontius, President and CEO of Corvus, said, “The ongoing infill/step-out part of the Phase-4 drill program has generated favorable results for expansion of the overall Mother Lode mineral resource model. In addition, the continued positive indication from the bottoms of these holes, showing a sizable oxide system at CIZ, is encouraging and Corvus will direct some of its deeper core tail drilling program toward evaluating the zones significance and its relationship to the deep intrusion target currently being tested. As we continue to gain more and more data on the impressive Mother Lode deposit, we will work to apply that data to our new discovery targets to the north, west and east of Mother Lode on Corvus Gold’s extensive land position.”
Mother Lode – Mineral Resource Expansion Phase-4 Results
(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 cut-off unless otherwise indicated below)
|Drill Hole #||from (m)||to (m)||Interval (m)||Gold (g/t)||Silver (g/t)||Comment|
AZ 000 dip-90
|216.41||225.55||9.14||0.67||n/a||Eastern Boundary Target
Upper OX zone
AZ 090 dip-75
|190.50||193.55||3.05||0.49||n/a||Central Main Zone
Upper OX zone
|inc||217.93||222.50||4.57||1.78||n/a||1 g/t cut|
|inc||256.03||320.04||64.01||2.27||n/a||1 g/t cut|
|inc||324.61||329.18||4.57||1.92||n/a||1 g/t cut|
|inc||349.00||356.62||7.62||1.32||n/a||1 g/t cut|
|359.66||361.19||1.53||1.98||n/a||CIZ Oxide Zone
Lost hole, poor recovery
AZ 090 dip-80
|109.73||115.82||6.09||0.39||n/a||Central Main Zone
Upper OX zone
|143.26||147.83||4.57||0.86||n/a||Upper OX zone|
|inc||158.50||208.79||50.29||2.10||n/a||1 g/t cut|
|350.52||355.09||4.57||1.43||n/a||CIZ Oxide Zone|
|362.71||367.28||4.57||0.34||n/a||Lost hole, poor recovery|
Qualified Person and Quality Control/Quality Assurance
Jeffrey A. Pontius (CPG 11044), a qualified person as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”), has supervised the preparation of the scientific and technical information that forms the basis for this news release and has approved the disclosure herein. Mr. Pontius is not independent of Corvus, as he is the CEO & President and holds common shares and incentive stock options.
Carl E. Brechtel, (Nevada PE 008744 and Registered Member 353000 of SME), a qualified person as defined by NI 43-101, has coordinated execution of the work outlined in this news release and has approved the disclosure herein. Mr. Brechtel is not independent of Corvus, as he is the COO and holds common shares and incentive stock options.
The work program at Mother Lode was designed and supervised by Mark Reischman, Corvus’ Nevada Exploration Manager, who is responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project log and track all samples prior to sealing and shipping. Quality control is monitored by the insertion of blind certified standard reference materials and blanks into each sample shipment. All mineral resource sample shipments are sealed and shipped to American Assay Laboratories (AAL) in Reno, Nevada, for preparation and assaying. AAL is independent of the Company. AAL’s quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025:1999. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Finally, representative blind duplicate samples are forwarded to AAL and an ISO compliant third-party laboratory for additional quality control. Mr. Pontius, a qualified person, has verified the data underlying the information disclosed herein, including sampling, analytical and test data underlying the information by reviewing the reports of AAL, methodologies, results and all procedures undertaken for quality assurance and quality control in a manner consistent with industry practice, and all matters were consistent and accurate according to his professional judgement. There were no limitations on the verification process.
Mr. Scott E. Wilson, CPG (10965), Registered Member of SME (4025107) and President of Resource Development Associates Inc., is an independent consulting geologist specializing in Mineral Reserve and Mineral Resource calculation reporting, mining project analysis and due diligence evaluations. He is acting as the Qualified Person, as defined in NI 43-101, and is the primary author of the Technical Report for the Mineral Resource estimate and has reviewed and approved the Mineral Resource estimate and the Preliminary Economic Assessment summarized in this news release. Mr. Wilson has over 29 years of experience in surface mining, mineral resource estimation and strategic mine planning. Mr. Wilson is President of Resource Development Associates Inc. and is independent of the Company under NI 43-101.
Mr. Wilson, a qualified person, has verified the data underlying the information disclosed herein, including sampling, analytical and test data underlying the information by reviewing the reports of AAL, methodologies, results and all procedures undertaken for quality assurance and quality control in a manner consistent with industry practice, and all matters were consistent and accurate according to his professional judgement. There were no limitations on the verification process.
Metallurgical testing on North Bullfrog and Mother Lode samples has been performed by McClelland Analytical Services Laboratories Inc. of Sparks Nevada (“McClelland”), McClelland is an ISO 17025 accredited facility that supplies quantitative chemical analysis in support of metallurgical, exploration and environmental testing using classic methods and modern analytical instrumentation. McClelland has met the requirements of the IAS Accreditations Criteria for Testing Laboratories (AC89), has demonstrated compliance with ANS/ISO/IEC Standard 17025:2005, General requirements for the competence of testing and calibration laboratories, and has been accredited, since November 12, 2012. Hazen Research Inc. (“Hazen”), an independent laboratory, has performed flotation, AAO testing and cyanide leach testing on samples of sulphide mineralization from the YellowJacket zone and Swale area of Sierra Blanca, and roasting tests on Mother Lode flotation concentrate. Hazen holds analytical certificates from state regulatory agencies and the US Environmental Protection Agency (the “EPA”). Hazen participates in performance evaluation studies to demonstrate competence and maintains a large stock of standard reference materials from the National Institute of Standards and Technology (NIST), the Canadian Centre for Mineral and Energy Technology (CANMET), the EPA and other sources. Hazen’s QA program has been developed for conformance to the applicable requirements and standards referenced in 10 CFR 830.120 subpart A, quality assurance requirements, January 1, 2002. Pressure oxidation test work on Mother Lode concentrate samples was performed by Resource Development Inc. of Wheatridge, CO.
For additional details, see 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 November 1, 2018 and amended on November 8, 2018, with an effective date of September 18, 2018 on the Company’s profile at www.sedar.com.
About the North Bullfrog & Mother Lode Projects, Nevada
Corvus controls 100% of its North Bullfrog Project, which covers approximately 90.5 km2 in southern Nevada. The property package is made up of a number of private mineral leases of patented federal mining claims and 1,134 federal unpatented mining claims. The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water right. The Company also controls 445 federal unpatented mining claims on the Mother Lode project which totals approximately 36.5 km2 which it owns 100%. The total Corvus 100% land ownership now covers over 127 km2, hosting two major new Nevada gold discoveries.
The combined Mother Lode and North Bullfrog Projects contains a Measured Mineral Resource for the mill of 9.3 Mt at an average grade of 1.59 g/t gold, containing 475 k ounces of gold and Indicated Mineral Resources for the mill of 18.2 Mt at an average grade of 1.68 g/t gold containing 988 k ounces of gold and an Inferred Mineral Resource for the mill of 2.3 Mt at an average grade of 1.61 g/t gold containing 118 k ounces of gold. In addition, the project contains a Measured Mineral Resource for oxide, run of mine, heap leach of 34.6 Mt at an average grade of 0.27 g/t gold containing 305 k ounces of gold and an Indicated Mineral Resource for, oxide, run of mine, heap leach of 149.4 Mt at an average grade of 0.24 g/t gold containing 1,150 k ounces of gold and an Inferred, oxide, run of mine, heap leach Mineral Resource of 78.7 Mt at an average grade of 0.26 g/t gold containing 549 k ounces of gold. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
About Corvus Gold Inc.
Corvus Gold Inc. is a North American gold exploration and development company, focused on its near-term gold-silver mining project at the North Bullfrog and Mother Lode Districts in Nevada. Corvus is committed to building shareholder value through new discoveries and the expansion of its projects to maximize share price leverage in an advancing gold and silver market.
A photo accompanying this announcement is available at
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