Caldera Complex
Iska Iska is a major silver-tin polymetallic porphyry-epithermal complex associated with a Miocene collapsed/resurgent caldera, emplaced on Ordovician age rocks with major breccia pipes, dacitic domes and hydrothermal breccias.
The Complex extends along strike in a general NNW-SSE direction for at least 4km, a width of at least 2km and likely extends to a depth of more than 1km. Mineralization age is similar to Cerro Rico de Potosí and other major deposits such as San Vicente, Chorolque, Tasna and Tatasi located in the same geological trend.