GR Silver Mining Ltd (CVE:GRSL) (OTCQB:GRSLF) (FRA:GPE) announced positive preliminary metallurgical test work results from a 2,700-tonne bulk sample excavated from the San Juan Area underground development at the company’s Plomosas silver project in Sinaloa, Mexico.
Off-site processing of the bulk sample generated 27 tonnes of high-grade silver-gold concentrate, the company said. The bulk sample was excavated from a zone representative of the silver-gold-lead-zinc hydrothermal breccia in the upper levels of the underground development in order to initiate preliminary metallurgical test work on the San Juan Area.
A weighted average of samples from the larger bulk sample showed silver concentrate of 15,147 grams per ton (g/t).
READ: GR Silver Mining outlines new mineralized zone at the San Juan area of its flagship Plomosas silver project
"We are very encouraged with the results of the initial bulk sampling of the San Juan Breccia, which has indicated that a high-grade silver-gold concentrate can be produced using standard grind and flotation processing technology,” CEO Marcio Fonseca said in a statement. “Our current focus continues to advance surface and underground drilling with five diamond core rigs at the Plomosas silver project. We are also carrying out preliminary metallurgical studies to investigate potential metallurgical flow sheets, aiming to achieve high-value final concentrate products from the areas being drilled."
The purpose of the bulk sample was to investigate the continuity of the mineralization along strike on the upper level and assess the initial metallurgical response of this type of mineralization to a standard processing flow sheet, the company said. Six veins have already been identified as making up the San Juan Area and the sample represents a discrete portion of one of those veins.
GR Silver believes that the test work results provide valuable information and inputs towards defining a metallurgical flow sheet for future developments at Plomosas. The current drilling program will continue to provide additional key data for both metallurgical testing and resource definition, the company added.
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