BLACKROCK SILVER ANNOUNCES UPDATED MINERAL RESOURCE ESTIMATE FOR THE TONOPAH WEST PROJECT
September 8, 2025
Reports 1.33 Million Tonnes Grading 493 G/T AgEq For 21.1 Million Ounces AgEq Indicated and 5.14 Million Tonnes Grading 525.9 G/T AgEq For 86.88 Million Ounces AgEq Inferred
VANCOUVER, BRITISH COLUMBIA, CANADA (Newsfile Corp.– September 8, 2025) – Blackrock Silver Corp. (TSX-V: BRC) (OTCQX: BKRRF) (FSE: AHZ0) (“Blackrock” or the “Company”) is pleased to report the results for its updated mineral resource estimate (the “Updated MRE”) for its 100% owned Tonopah West project (“Tonopah West” or the “Property”), located in West-Central Nevada within Nye and Esmeralda Counties, Nevada, United States. Tonopah West is conveniently situated directly adjacent to the town of Tonopah in Western Nevada, with highway US 95 crossing the Property, and the resource area lies exclusively within patented mining claims and fee lands. All amounts herein are presented in United States Dollars unless otherwise stated.
HIGHLIGHTS:
The Updated MRE contains a total of 0.107 million ounces (“Mozs”) of gold (“Au”) and 9.5Mozs of silver (“Ag”), or 21.1Mozs of silver equivalent (“AgEq”) of indicated mineral resources, and 0.47 Mozs of Au and 35.5Mozs of Ag, or 86.88Mozs of AgEq of inferred mineral resources.
Indicated mineral resources were not previously included in the mineral resource estimate for Tonopah West effective August 25, 2024 (the “Previous MRE”), highlighting how Blackrock’s recent in-fill drilling program (the “M&I Conversion Program“) at Tonopah West which commenced in mid-July 2024 has confirmed previous inferred mineral resource estimates and improved geologic confidence in the mineral resource estimate on the Project.
At a 180 grams per tonne (“g/t”) AgEq cutoff, the average block-diluted grade of the indicated mineral resources is 493 g/t AgEq and the average block-diluted grade of the inferred mineral resources is 525.9 g/t AgEq.
The Updated MRE includes 83 new drillholes completed in 2024-2025 and is based on a refined geologic model which was updated to reflect the new drilling and added more detail to the spatial distribution of mineralized veins.
Silver and gold mineralization at Tonopah West remains open to the northwest, east and internally between the main bodies of mineralization, and at depth.
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