The Sierra Madre del Sur might be best known for its skarn gold deposits, but the extent of Tertiary vulcanism has brought its share of epithermal deposits. Those are distributed extensively across the region, and to date in three have been delineated resources.
The San Jose Mine of Fortuna Silver in Oaxaca has the biggest resource base, with over 640 K Oz Au and almost 90 million Oz Ag, at an average grade of 1.7 g/t Au and 235 g/t Ag. The Higo Blanco project of Aura Silver Resources, and Fresnillo’s San Nicolas project also host resources with similar grades, but up to now what has been defined so far is not as significant. There are plenty of low sulfidation vein prospects and projects in the region.
The numbers we manage are largely from technical reports, company’s websites or yearly filings to the stock exchange, most to the end of 2014.