The historical multimillion-ounce Rosario gold-silver mine was reported to have closed in 1941 after an operating life spanning over 250 years.
The mine exploited precious metals from numerous veins up to 30m in width, located below the current town of Rosario. The historical operations are evidenced by three lakes which resulted from the subsidence of the underground workings and filling with groundwater. The old mine is currently held by Fresnillo plc, but further activity is not possible due to the position of the overlying Rosario town residential infrastructure with a population of 16,000.
However, as part of the March 2020 acquisition of the Plomosas Silver Project from First Majestic Silver Corp., GR Silver Mining Ltd also acquired a package of three concessions (Rosario I, Rosario II, and Rosario IV) strategically located adjacent to the Rosario town. These concessions, totaling 1,383 hectares, may host extensions to the historical Rosario gold-silver mineralization. The key regional structural features are oriented in a NW-SE direction, parallel to regional graben basin development and often the focus of precious metals mineralization.
GR Silver Mining Ltd will be reviewing these three concessions which lie along strike from, and also sub-parallel to, these potential structural extensions. Considering their close proximity to the multimillion-ounce historical Rosario mine, the concessions making up GR Silver’s Rosario Gold-Silver Project are substantially under-explored and highly prospective.