The Velardeña Mining Unit, owned by Minerales Metálicos del Norte, S.A., a member of Grupo Industrial Minera México, S.A. de C.V., is located in northeastern Durango State within the Cuencamé municipality, 150 km northeast of the city of Durango and 85 km south-southwest of Torreón. Geographic coordinates of Velardeña Village, in the vicinity of the mineworks, are 25°04′N and 103°44′W. Altitude above sea level ranges from 1,400 m in the valley separating Sierra de Santa Maria and Sierra de San Lorenzo to about 2,000 m at the San Lorenzo peaks. Climate and vegetation are typical of northern Mexico’s semidesert zone. Federal Highway 49 runs approximately 6 km northwest of Velardeña, crossing the Durango-TorreÃ³n railroad track 2.5 km farther on at PedriceÃ±a, near which is a small light-aircraft runway. Velardeña has telephone and telegraph facilities, schools, and other services for a population of 5,000, most of whom depend on the mines for a living (Fig. 1).
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.