GR Silver Mining Ltd (TSX-V:GRSL) has announced additional underground drilling results in the Plomosas Mine Area as part of the 2022 infill and exploratory drilling program at the company's wholly-owned Plomosas Project in Sinaloa, Mexico.
In a statement, GR Silver Mining chairman and CEO, Eric Zaunscherb commented: "The previous resource estimate for the Plomosas Mine Area incorporated many historical drill holes that were selectively sampled for precious metals mineralization. The extensive surgical infill drill program conducted by GR Silver Mining provided 'proof of concept', successfully replacing many historical drill holes in the resource model.
"In the process, the company's geologists have opportunely defined incremental high-grade precious metal mineralization that was previously unrecognized. These facts suggest the potential for an increase in grade and content in the Plomosas Mine Area in the highly anticipated resource update."
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Among the underground drilling objectives was to confirm the presence of high-grade gold epithermal veins in the hanging wall and footwall of the main mineralized zone in new areas of the historic underground mine.
The 35 drill holes reported were all drilled from within the historic Plomosas Mine Area, mainly below the 900 level, and represent the penultimate batch of drill results to be incorporated into the resource estimation at the Plomosas Mine Area.
Gold highlights from the underground drilling results were (downhole widths):
- PLIP22-30: 14.1 metres (m) at 2.67 grams per ton (g/t) Au and 69 g/t Ag (353 g/t AgEq1) including 0.6m at 40.18 g/t Au and 219 g/t Ag (4,075 g/t AgEq)
- PLI22-52: 9.9m at 1.91 g/t Au, including 0.25m at 64.50 g/t Au
In addition, the drilling results continue to reveal attractive high-grade silver-polymetallic mineralization in unmined areas at the lower levels of the historic underground mine.
The drill hole results continue to demonstrate the potential to incorporate wide and attractive polymetallic results into the upcoming resource estimation.
Other drillhole results included
- PLIP22-29: 22.0m at 1.01 g/t Au, 55 g/t Ag, 3.1% Pb, 4.8% Zn and 0.2% Cu (441 g/t AgEq) including 3.0m at 5.42 g/t Au, 299 g/t Ag, 1.8% Pb, 9.7% Zn and 0.6% Cu (1,291 g/t AgEq)
- PLIP22-35: 18.5m at 1.08 g/t Au, 20 g/t Ag, 0.5% Pb, 1.5% Zn and 0.3% Cu (221 g/t AgEq) including 0.8m at 6.09 g/t Au, 46 g/t Ag, 2.7% Pb, 8.4% Zn and 0.8% Cu (1,105 g/t AgEq)
- PLIP22-42: 3.1m at 1.97 g/t Au, 50 g/t Ag, 19.7% Pb, 15.6% Zn and 0.3% Cu (1,422 g/t AgEq)
The Plomosas Mine Area drilling program has now been completed and one batch of assays is pending to be processed and incorporated into the resource estimation, expected to be published later in Q1 2023.
The program has achieved its objectives of replacing some specific areas where zero values were adopted in the previous resource estimation, but also, more importantly, defining the presence of high-grade gold and silver zones which form part of a distinct mineralizing event, hosted within the same structure as well as the footwall and hanging wall of the Plomosas Breccia.
The company completed the infill drilling program at the Plomosas Mine Area at the end of 2022 and final assays are being received and processed. This program added approximately 11,750 metres of core drilling (186 holes) in specific areas of the existing NI 43-101 resource block model, achieving the key objectives and supporting more detailed geological mineralization modelling, while also enhancing the silver and gold grade distribution in the upcoming resource estimate.
GR Silver Mining is a Canadian-based, Mexico-focused junior mineral exploration company engaged in cost-effective silver-gold resource expansion on its 100%-owned assets, located on the eastern edge of the Rosario Mining District, in the southeast of Sinaloa State, Mexico.
The company controls 100% of two past-producer precious metal underground and open pit mines, within the expanded Plomosas Project, which includes the integrated San Marcial Area and La Trinidad acquisition. In conjunction with a portfolio of early to advanced-stage exploration targets, the company holds 734 square kilometres of concessions containing several structural corridors totaling over 75 kilometres in strike length.
Contact the author at jon.hopkins@proactiveinvestors.com