SCOUT DRILLING CONFIRMS THE EXTENSION OF THE HIGH-GRADE MERTEN VEIN CREATING POTENTIAL TO EXPAND THE DPB RESOURCE UP TO 1,200 METRES TO THE EAST

VANCOUVER, BRITISH COLUMBIA, CANADA (Newsfile Corp.– March 31, 2025) – Blackrock Silver Corp. (TSX-V: BRC) (OTCQX: BKRRF) (FSE: AHZ0) (“Blackrock” or the “Company”) is pleased to announce the results from the reverse circulation (“RC”) Scout Drilling Program completed on the southeastern side of the DPB M&I Conversion area on its 100% owned Tonopah West project located in Nye and Esmeralda Counties, Nevada, United States.

Starting in late December 2024 and finishing in late January 2025, the Company completed ten exploration RC drillholes in the eastern portion of the DPB area and the adjacent Ohio target to test for gold and silver along a structural zone and beneath a felsic sill. A total of 3,857 metres (12,655 ft) was drilled. The program was very successful with silver and gold being returned from all targets.

SCOUT PROGRAM HIGHLIGHTS:

Assays from our reverse circulation scout drill program have returned significant gold & silver values in 7 drillholes that have successfully expanded the footprint of mineralization up to 1,200 metres to the east of the existing DPB resource toward the historic Ohio mine;
These intercepts cover a new zone of mineralization not included in the 2024 resource that may impact the upcoming DPB South resource update (Q3, 2025);
TW25-128 which returned 9.6 grams per tonne (g/t) gold and 1,198 g/t silver over 1.52-metres (2,063 g/t silver equivalent (AgEq)) from 292 metres in the Ohio area;
TW25-133 returned multiple thick zones of mineralization including 10.46 g/t gold and 10.6 g/t silver over 4.57-metres (952 g/t AgEq) including 1.52 metres grading 21.45 g/t gold and 15.7 g/t silver (1,948 g/t AgEq) from 309 metres and 3.05 metres grading 270 g/t AgEq (129 g/t silver and 1.57 g/t gold) from 280 metres;
TW25-130 cut 1.52 metres of 587 g/t AgEq (3.3 g/t gold and 290 g/t silver) from 189 metres
Assays from multiple drillholes have extended the Merten vein system by 540 metres along strike to the east of the main DPB South resource. With the inclusion of discovery hole TW25-128, targeting an area historic miners referred to as the Ohio vein, the mineralized trend could extend up to 1,200-metres in length;
Additional drilling has been deployed to this area and assays for three core holes, TXC25-133, -134 and -135 are pending
Andrew Pollard, Blackrock’s President and CEO, stated, “Results from our RC Scout drilling program confirm the discovery of a new high-grade gold and silver structural zone extending 1.2 kilometres (km) east from our existing resource shell. Historic miners referred to this eastern target area as the Ohio Vein, a substantial producer in the early 1900’s, but until now, its mineralization had remained elusive. With every drillhole in this program returning elevated grades across the trend, the scale of the project has increased dramatically, with the results suggesting significant new high-grade tonnage potential. Coupled with our recently released expansion results (see February 24, 2025 news release), where we successfully stepped out 500 metres to the northwest, we have increased the footprint of high-grade mineralization along the vein corridor by over 65% this year, adding an additional 1.7km of drill-defined strike. We have already deployed additional drilling to this new zone, with assays for three core drillholes pending.”

TW25-133 returned significant silver and gold with values starting at 309-metres grading 10.46 g/t gold and 10.6 g/.t silver over 4.57 metres (952 g/t AgEq). This mineralization extends the Merten vein 540 metres to the east-southeast of the main DPB South resource. With the inclusion of TW25-128 which returned 9.6 g/t gold and 1198 g/t silver over 1.5-metres (2,063 g/t AgEq), the zone could be up to 1,200-metres in cohesive strike. Table 1 summarizes the assay results (150 g/t AgEq cutoff).

Table 1: Scout Drilling Program results above 150 g/t AgEq
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https://blackrocksilver.com/blackrock-silver-steps-out-1-2km-across-new-high-grade-zone-at-tonopah-west/