GR Silver Mining Drills Two New Silver and Gold Mineralized Zones at San Marcial. SMS25-10A Returns 9 m at 374 g/t Ag including 1.0 m at 1,542 g/t Ag; and 33 m at 1.44 g/t Au including 1.2 m at 32.1 g/t Au
Executive Summary
- GR Silver Mining announced step‑out drill hole SMS25‑10A intersected high‑grade silver (9 m @ 374 g/t Ag, including 1 m @ 1,542 g/t Ag) and gold (33 m @ 1.44 g/t Au, including 1.2 m @ 32.1 g/t Au).
- The results define two new mineralized zones outside the current resource area, supporting a porphyry‑related model and indicating potential for significant resource expansion.
- The hole is the farthest southeast drilled in the Parallel Breccia Target, confirming continuity of mineralization over at least 500 m from the existing resource.
Key Details
- Hole SMS25‑10A – Silver Zone
- Interval: 24.0 m to 33.0 m (9.0 m true width not estimated)
- Grade: 374 g/t Ag, 0.08 % Cu, 0.59 % W
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High‑grade sub‑interval: 32.0 m to 33.0 m – 1.0 m @ 1,542 g/t Ag, 1.4 % Cu, 0.62 % W
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Hole SMS25‑10A – Gold Zone
- Interval: 122.7 m to 155.8 m (33.2 m)
- Grade: 4 g/t Au (no Cu/W reported)
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High‑grade sub‑interval: 137.5 m to 138.7 m – 1.2 m @ 32.1 g/t Au
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Geological Context
- Targeted a high‑chargeability geophysical anomaly never previously drilled.
- Mineral assemblage includes tourmaline, actinolite, albite, K‑feldspar, overprinted by quartz‑pyrite alteration and chlorite‑hematite veining.
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Presence of Cu and W alongside Ag suggests proximity to an intrusive porphyry system ~150 m below the hole bottom.
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Structural Significance
- Intercepts lie along a NE‑SW structural corridor intersecting major NW‑SE regional structures.
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Demonstrates continuity of mineralized structure for ≥500 m from the existing San Marcial Resource Area.
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Program Context
- Part of the 2025 San Marcian Step‑Out Drill Program (Table 2 lists all holes, statuses, and coordinates).
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Other recent holes (e.g., SMS25‑08) also returned high‑grade gold zones, reinforcing the prospectivity of both NW‑SE and NE‑SW trends.
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Qualified Person
- Marcio Fonseca, P.Geo., President & CEO, reviewed and approved the release under NI 43‑101.
Notable Quotes
“The ongoing success of step‑out drilling at the San Marcial Area in 2025 reflects the diligent and detailed exploration efforts of GR Silver Mining's team… The identification of mineralogical assemblages characteristic of porphyry‑related systems, together with the presence of high‑grade gold zones, underscores the strong potential for further resource expansion at San Marcial.” – Marcio Fonseca, President & CEO
All results are uncut and undiluted; true widths have not been estimated due to insufficient data.