The Molango Manganese District covers an approximate area of 1,250 km2 in northeasternmost Hidalgo State (Fig. 1). In spite of the extensive erosion of the orebody, vast manganese ore volumes are spread over approximately 180 km2 (Frakes and Bolton, 1984).
The center of the area, which includes the villages of Molango, Xochicoatlan, Lolotla, Tepehuacan, and Tlanchinol, is at 98°45′W and 20°55′N. The Tetzintla area, presently under development, is located in the northern part of the Manganese District, about 20 km north of Molango (Hidalgo), at 90°41′15″W, and 20°57′30″N. The paved Mexico-Tampico short route crosses the district from south to north; at “Las Casetas” on km 157, a 16-km paved roadway connects the Tetzintla Mine with the Compañía Minera Autlán's industrial and housing (Otongo) areas.
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.