• 1,181 gpt AgEq1 over 3.1m (846 gpt Ag, 0.8 gpt Au, 2.7% Pb and 6.0% Zn) includes 3,224 gpt AgEq over 1.1m (2,300 gpt Ag, 2.1 gpt Au, 7.6% Pb and 16.3% Zn)
• 1,120 gpt AgEq over 2.7m (931 gpt Ag, 0.1 gpt Au, 1.9% Pb and 4.0% Zn) includes 1,566 gpt AgEq over 1.4m (1,478 gpt Ag, 1.3% Pb and 1.6% Zn)
• 755 gpt AgEq over 3.5m (737 gpt Ag, 0.1 gpt Au, 0.1% Pb and 0.3% Zn)
• 720 gpt AgEq over 4.8m (563 gpt Ag, 0.3 gpt Au, 1.6% Pb and 2.7% Zn)
Vancouver, BC – GR Silver Mining Ltd. (TSXV: GRSL, FRANKFURT: GPE, OTCQB: GRSLF) (“GR
Silver Mining” or the “Company”) – is pleased to report high-grade drill results from the San Juan-La Colorada Area at its 100%-owned Plomosas Silver Project (“Plomosas Project”) in Sinaloa, Mexico.
These drill results highlight continuity of high-grade silver mineralized zones in a 100 m step out from a previously released section of drill hole results at the San Juan Area (Figure 1). These latest results define a mineralized strike length for the the low sulphidation epithermal system of up to 1,000 m (see News Release dated July 7, 2020). This news release features results from 17 diamond core holes drilled by previous companies and not previously released. The cross section containing these results establishes a high-grade continuous zone of Ag-rich polymetallic breccia, along a shallow dipping fault for approximately 400 m down dip. In addition, the drill results continue to confirm silver-gold mineralized zones hosted by multiple high angle faults (link to cross section).
The results of the 17 drill holes indicate the possible extension of the San Juan-La Colorada Area towards the San Francisco Area to the south, supporting the presence of a much larger low sulphidation epithermal Ag-Au rich system (Figure 2).
The mineralized veins and hydthermal breccias appear to be proximal to each other in subparallel
1AgEq is based on long term gold, silver, zinc and lead prices of US$1600 per ounce gold, US$16.50 per ounce silver, US$0.85 per pound zinc and US$0.95 per pound lead. The metallurgical recoveries are assumed as 90% Ag, 95% Au, 78% Pb and 70% Zn.structures, a feature typical of low sulphidation epithermal systems. The concentration of multiple veins, in combination with increased continuity along strike and down-dip, represents an attractive target for future resource delineation.
GR Silver Mining President and CEO, Marcio Fonseca, commented, “The Company has prioritized the validation of the drill holes at the San Juan-La Colorada Area, focusing on expansion of mineralization along strike and down-dip. These latest results confirm high-grade mineralization extending to the S towards the San Francisco Area, suggesting potential to outline a large low sulphidation epithermal system with at least a 1000 m strike length”.
Figure 1: Drone Image of the San Juan-La Colorada Area (looking to the NW) - Drill Hole Location Map.
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The Company is advancing the rehabilitation of the historical San Juan underground workings, while continuing with geological and structural mapping/sampling. An improved understanding of the mineralized systems, which consists of a set of multiple structures hosting high-grade Ag-Au mineralization, has resulted in the definition of new drill targets. Detailed mapping by GR Silver Mining has identified down plunge extensions of previously released high-grade silver intercepts in polymetallic hydrothermal breccia (see news release dated April 2, 2020). In the lower levels of the historically developed San Juan workings, massive argentite, galena and sphalerite zones have been mapped similar to the previously released high-grade silver zones which included results such as 0.4 m at 4,698 g/t Ag and 0.2 m at 6,128 g/t Ag.

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