Barite has been mined in the Coalcom án area since the 1950s. Compa ña Minera Autlán undertook a manganese exploration drilling program at the end of that decade with negative results; however, Zn and Ag values, of little interest to the company at the time, were significant.
What is now known as the La Minita Unit of Minera Capela, S.A. de C.V., was not discovered until 1976, when the Peñoles San Luis Potosí (S.L.P.) Regional Office, under Jose E. Gaytán Rueda, began searching for volcanogenic deposits
Figures & Tables
This volume was developed, produced, and privately printed in Mexico, in Spanish, by the late Ing. G.P. Salas in 1988, as a Mexican contribution to the Geology of North America, with the understanding that it would be translated into English for inclusion in the set. The translation is by Dr. Cecily Petzall of Caracas, Venezuela, with considerable figure translation and redrafting provided by GSA. Salas worked on the volume until his death, with much valuable help from Ing. Hugo Cortez Guzmán. The result is a valuable English-language synthesis of the information available to Salas in the early to mid-1980s about the geothermal, coal, and metal-mining sectors (and some non-metallic resources) of the economic geology of Mexico.