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Diablillos


The 100%-owned Diablillos gold-silver project is located 160 kilometers southwest of Salta on the altiplano of northern Argentina. The property is road accessible and is 275 kilometers south of our Pirquitas mine.

In a news release dated June 18, 2009, Silver Standard announced an updated resource estimate for Diablillos based on recent diamond drilling which was successful in converting a significant portion of the previously reported inferred resources into the indicated category. The project now hosts indicated resources of 640,000 ounces of gold and 77.1 million ounces of silver, and inferred resources of 187,000 ounces of gold and 6.3 million ounces of silver.

Based on a locked-cycle metallurgical program using conventional milling, preliminary precious metal recoveries averaged 86.9% for gold and 87.0% for silver. The heap leaching characteristics of the mineralization were also tested on a number of composites. Recoveries from column tests using a 3/4 inch crush averaged 65.2% for gold and 43.5% for silver.

A pre-feasibility study will be undertaken that will explore various combinations of milling and heap leaching alternatives.