Mexico - Mercedes | Mexico (100%-Yamana owned)
The Mercedes gold-silver underground mine in Sonora state began production in late 2011, and exceeded expectations in its first full year of operation. Production is expected to increase further in future years, as development of the mine accelerates and plant modifications are introduced. Ore is treated in a 1,500 tonnes per day plant that incorporates agitated leaching, counter current decantation and the Merrill-Crowe process.
The operation involves five vein zones. In 2012 development continued in the Barrancas zone, with production starting late in the year from the higher grade Lagunas Norte vein in that zone. Lagunas Norte is one of the newest discoveries at the mine and offers significant potential for increasing production as it was not included in the original mine plan.
Confirmation of width and grades in the Lupita zone and the recent discovery of high grade mineralization in the Rey de Oro zone are expected to boost measured and indicated mineral resources. The increase in mineral resources will extend mine life and help to maintain higher throughput and sustainable production levels.
Mineral Reserves and Mineral Resources (as at Dec. 31, 2012)
953,000 oz. proven & probable + 287,000 oz. measured and indicated
10.1 million oz proven & probable + 3.1 million oz measured and indicated
Strategic Mine Life:
* Please refer to www.yamana.com/Operations/ReservesAndResources
for complete information relating to mineral reserves and mineral resources indicating tonnage and grade for the various mines and projects.