The mine is located in Cajón del Maipo, in the commune of San José de Maipo, 76 km from Santiago and north of the town of San Gabriel. It is part of the old Merceditas mining district, which produced silver in colonial times and later copper. At its peak, Minera Merceditas produced more than 40% of the copper produced in Chile.

The objective of this visit was to recognize the geology of the area, the mineralization and its extension along with the mining development. To date there is no mining activity and most of the works have partial access. The UTM coordinates of the center of the mineralized area are N 6.258.200 – E 389.900 near the Volcán River.

ROSALINDA Project

Mineralization: The mineralization observed in the mining works is sulfide, constituting a mantle contained in a gray tuff; it consists of chalcopyrite, arsenopyrite, danaite and pyrite, extending as fine dissemination and in small clusters. In some areas, magnetite is abundant, as well as specularite.
Along with the mineralization, the rock presents quartz banding and a slight sillification.

Mining Workings: During the visit, 7 mining workings were recognized, some of 60 m, others of 20-25 m, partially accessible. There are others that are covered by alluvial fill.
Even though the area is covered with bushes and shrubs, it is possible to see large clearings, the product of an old mining operation.

Mining Property: The Rosalinda mining property is covered by the exploitation concession called Rosalinda 1/10; It covers an area of 96 hectares and belongs to the Melosita Uno Society of San José de Maipo.