The Santa Eulalia Mining District, covering approximately 30 km2 is located 25 km east of the town of Chihuahua in the ierra Santo Domingo (Fig. 1). It is divided into two mineralized zones: the East Field (San Antonio Mine), and the West Field (Buena Tierra and Potosi Mines) (see Fig. 5). The orebodies are principally chimneys and mantos, consisting of minor filling and replacement along fractures and disseminated minerals in tactites.
Access to the district is by paved road from Chihuahua; a continually reconditioned dirt road runs for 11 km between the two fields. Temperatures in the dry steppe climate range from −4°C (winter low) to 38°C (summer high); the normal torrential rain period is from May to September with lighter rains in November and December. Mining is the region's main economic activity, employing about 90 percent of the working-age males; cattle-raising and agriculture are of domestic scale.
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.