RETRANSMISSION: Benchmark Delivers 2.1 Million oz of 1.62 g/t AuEq Indicated and 821,000 oz of 1.57 g/t AuEq Inferred for Its Initial Mineral Resource Estimate
- Indicated Mineral Resource of 2.1 million ounces grading 1.62 grams per tonne (g/t) gold equivalent (AuEq), as per Table 1;
- Inferred Mineral Resource of 821,000 ounces grading 1.58 g/t AuEq;
- The Mineral Resource is amenable to both open pit and underground mining methods;
- Pit constrained (open pit)
- Indicated - 2.05 M oz AuEq
- Inferred - 595 k oz AuEq
- Out of Pit (potential underground below the pit at Cliff Creek and AGB)
- Indicated - 48 k oz AuEq
- Inferred - 226 k oz AuEq
- Pit constrained (open pit)
- The Mineral Resource shows excellent continuity and consistency, demonstrated by increasing AuEq cut-off grades having marginal impact on the pit constrained AuEq ounces as demonstrated in Table 2;
- The MRE will form the basis of a Preliminary Economic Assessment (PEA) expected to be completed in late Q2 2021, and;
- All of the zones remain open and Benchmark is fully funded for its upcoming 2021 100,000 metre drill program.
John Williamson, CEO, commented, "This initial multi-million-ounce Mineral Resource has exceeded all expectations and has significant expansion potential with the planned 2021 drill program. In addition, the regional exploration drill program will be targeting zones for new satellite deposits."
Ian Harris, VP Engineering, commented, "The Project is demonstrating potential for economic mining methods with high-grade mineralization extending from surface to depth. The resilience of the Mineral Resource at a wide range of cut-off grades in all pits bodes well for the upcoming Preliminary Economic Assessment and is expected to provide multiple routes to successful project design. Benchmark's drill-to-build philosophy is delivering the results to develop the Lawyers project into a world-class gold silver mine."
The 2021 drill program will consist of approximately 100,000 m of drilling, of which 50,000 m will be for Mineral Resource definition drilling to both expand current Mineral Resources and to upgrade the current Inferred Mineral Resources to Measured & Indicated classifications for inclusion in an anticipated Feasibility Study in 2022. In addition to expanding the Mineral Resource zones at depth and along strike, a regional exploration program will consist of ~50,000 m to drill test and expand existing and new discovery targets. The regional program has potential to add gold-silver ounces in an updated Mineral Resource Estimate for 2021. The effective date of the MRE is May 11, 2021 and a Technical Report on the Lawyers project will be filed on the Company's website and SEDAR within 45 days of this news release.
Table #1: Lawyers Initial Mineral Resource Estimate (1-7)
|Pit Constrained Mineral Resource @ 0.5 g/t AuEq Cut-Off|
|Resource Area||Classification||Tonnes k||Au |
|AuEq g/t||Au |
|Total Out of Pit Mineral Resource @ 2.0 g/t AuEq Cut-Off|
|Classification||Tonnes k||Au |
|AuEq g/t||Au |
(Cliff Creek + AGB)
|Total Mineral Resource|
|Resource||Classification||Tonnes k||Au |
|AuEq g/t||Au |
- Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. The estimate of Mineral Resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues. There is no certainty that Mineral Resources will be converted to Mineral Reserves.
- The Inferred Mineral Resource in this estimate has a lower level of confidence than that applied to an Indicated Mineral Resource and must not be converted to a Mineral Reserve. It is reasonably expected that the majority of the Inferred Mineral Resource could be upgraded to an Indicated Mineral Resource with continued exploration.
- The Mineral Resources in this news release were estimated in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions (2014) and Best Practices Guidelines (2019) prepared by the CIM Standing Committee on Reserve Definitions and adopted by the CIM Council.
- Mineral Resource estimation parameters used were as follows:
- Total database of 696 drill holes with 77,175 assays
- 65 mineralized domains
- 5m x 5m x 5m block model
- One metre capped composites
- Inverse distance cubed grade interpolation for Indicated used minimum of three composites from two holes
- Average bulk density of 2.67 t/m3
- Average respective Indicated and Inferred classification search ranges of 35m and 65m
- Metal prices used were US$1,600/oz Au and US$20/oz Ag and 0.80 FX with process recoveries of 90% Au and 83% Ag. A C$24/tonne process cost and C$5 G&A cost were used. The Au:Ag ratio was 90.5:1.
- The constraining pit optimization parameters were C$3/t mineralized and waste material mining cost and 50-degree pit slopes with a 0.50 g/t AuEq cut-off.
- The out-of-pit parameters were at a C$100/t mining and $15/t sustaining development cost. The out-of-pit Mineral Resource grade blocks were quantified above the 2.0 g/t AuEq cut-off, below the constraining pit shell and within the constraining mineralized wireframes. Out-of-Pit Mineral Resources selected exhibited continuity and reasonable potential for extraction by the long hole underground mining method. Isolated, non-contiguous blocks were removed.
Figure 1 - Map illustrating the Cliff Creek, AGB, Dukes Ridge and Phoenix block models, $1600/oz AuEq modeled open pits and the expansion potential of the zones.
To view an enhanced version of this graphic, please visit:
Table #2: Sensitivity analysis of grade and tonnage at varying pit-constrained AuEq cut-off grades at the Cliff Creek, AGB, and Dukes Ridge & Phoenix deposits.
|Cliff Creek||AuEq g/t||k||g/t||Au k oz||g/t||Ag M oz||g/t||AuEq k oz|
Quality Assurance and Control
Results from samples were analyzed at ALS Global Laboratories (Geochemistry Division) in Vancouver, Canada (an ISO/IEC 17025:2017 accredited facility). The sampling program was undertaken by Company personnel under the direction of Rob L'Heureux, P.Geol. A secure chain of custody is maintained in transporting and storing of all samples. Gold was assayed using a fire assay with atomic emission spectrometry and gravimetric finish when required (+10 g/t Au). Analysis by four acid digestion with 48 element ICP-MS analysis was conducted on all samples with silver and base metal over- limits being re-analyzed by atomic absorption or emission spectrometry. Rock chip samples from outcrop/bedrock are selective by nature and may not be representative of the mineralization hosted on the Project.
Michael Dufresne, M.Sc, P.Geol., P.Geo., and Eugene Puritch, P.Eng. of P&E Mining Consultants Inc. are the Qualified Persons, as defined in National Instrument 43-101 Standards of Disclosure for Mineral Projects, who have reviewed and approved of the scientific and technical disclosure in this news release. Mr. Puritch is independent of the Company.
About Benchmark Metals
Benchmark Metals Inc. is a Canadian mineral exploration company focused on proving and developing the substantial Mineral Resource potential of the Lawyer's Gold-Silver Project, located in the prolific Golden Horseshoe of northern British Columbia, Canada. The Company trades on the TSX Venture Exchange in Canada, the OTCQX Best Market in the United States, and the Tradegate Exchange in Europe. Benchmark is managed by proven Mineral Resource sector professionals, who have a track record of advancing exploration projects from grassroots scenarios through to production.
ON BEHALF OF THE BOARD OF DIRECTORS
s/ "John Williamson"
John Williamson, Chief Executive Officer
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