Primero owns 100% of the Ventanas and Lechuguilla properties, which are not covered by the San Dimas silver purchase agreement with Silver Wheaton.

The Ventanas property is located 32 kilometres southeast of San Dimas, totals 3,470 hectares contains no less than 17 old mine workings and multiple low to intermediate sulphidation epithermal veins systems. It is divided into three vein areas: the Mala Noche, Ventanas and San Cayetano areas. Each has numerous previously explored and worked veins with a style of mineralization similar to San Dimas. Despite the significant historical workings, many parts of the Ventanas property remain under-explored. A National Instrument 43-101 compliant resource estimate was completed for Mala Noche Resource Corp. (predecessor of Primero) in 2009.


The Lechuguilla greenfield property is directly adjacent to the south of San Dimas and is largely unexplored due to its large size and the region's challenging topography but display similar geological characteristics as found on the San Dimas and Ventanas properties. It is a highly prospective area, with the potential to identify mineralization on a scale potentially comparable to the current San Dimas mine. The Lechuguilla property is covered extensively by the regional upper volcanic sequence, however the discovery of the Jessica vein in late-2014 demonstrated to Primero's exploration geologists that the volcanic capping was a post-mineralization event and that precious metal bearing veins continue to exist under this geological sequence. Lechuguilla contains numerous identified "geological windows" through the upper volcanic capping with multiple vein outcroppings already noted.

Primero's total concession area in the San Dimas district totals 68,628 hectares.

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