Mineral resources of parts of the Departments of Antioquia and Caldas, Zone II, Colombia
The mineral resources of an area of 40,000 sq km, principally in the Department of Antioquia, but including small parts of the Departments of Caldas,…
Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.
Mineral resources of parts of the Departments of Antioquia and Caldas, Zone II, Colombia Author: Hall, R.B., Feininger, Tomas, Barrero, L., Dario, Rico H. Year: 1970 Category: Report The mineral resources of an area of 40,000 sq km, principally in the Department of Antioquia, but including small parts of the Departments of Caldas, C6rdoba, Risaralda, and Tolima, were investigated during the period 1964-68. The area is designated Zone II by the Colombian Inventario Minero Nacional(lMN). The geology of approximately 45 percent of this area, or 18,000 sq km, has been mapped by IMN. Zone II has been a gold producer for centuries, and still produces 75 percent of Colombia's gold. Silver is recovered as a byproduct. Ferruginous laterites have been investigated as potential sourc Tags: usgs, wollastonite deposits Source: ://pubs.usgs.gov/of/1970/0148/plate-1.pdf