The Los Campos project covers approximately 500 hectares and is located in the southern part of the Zacatecas District, a world-class epithermal silver-gold district that has historic production in excess of 1 billion ounces of silver and nearly 10 million ounces of gold. The Los Campos was reportedly an important producer of silver in colonial times, and surface workings consist of four vertical shafts of unknown depth. In the centre of the project is an inactive kaolin quarry.
The geology of the Los Campos concession consists of intermediate volcanic rocks overlain by rhyolite, rhyolite tuff and red conglomerates. Very little is known about mineralisation on the Los Campos property. What is visible on the dumps appears to be epithermal in nature and similar to mineralisation elsewhere in the Zacatecas district. The prominent 200m x 100m illite-smectite hydrothermal alteration pipe is thought to be the barren clay alteration cap that has formed above an epithermal silver-gold deposit.
In the south of the prospect outcrops rocks of the Eocene conglomerate that could be a favourable host for quartz stockwork veining and disseminated silver-gold mineralisation, similar to that found at the Laguna Zacatecana prospect east of Zacatecas.
Ten samples were taken by the Mexican government in the 1980’s from the two dumps associated with the main shafts. These dumps were estimated to contain 9,000 tonnes averaging 134 g/t Ag. Similar data is available for the San Vincente dumps, which were estimated to contain 27,681 tonne averaging 123 g/t Ag.