La Primavera geothermal field, Jalisco
Saúl Vengas S., Germán Ramírez S., Carlos Romero G., Pablo Reyes V., Antonio Razo M., Luis C.A. Gutiérrez N., Francisco Arellano G., José Perezyera y Z., 1991. "La Primavera geothermal field, Jalisco", Economic Geology, Mexico, Guillermo P. Salas
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Preliminary exploration to evaluate the La Primavera (Jalisco) geothermal prospect began in the 1960s with photogeological interpretation and geochemical surveys of the surface shows. In the late 1960s the (then) Office of Geothermal Exploration of the ComisiÃ³n Federal de Electricidad (CFE) drew up a wideranging geological project to explore the central portion of Jalisco State. Results indicated La Primavera to be the most favorable of several geothermal prospects by reason of its geologic structural conditions and the ages and compositions of its rocks. Detailed geological, geochemical, geophysical, and geohydrological surveys were carried out to select exploratory well locations. Five geothermal wells (PR-1, PR-2, PR-4, PR-5, and RC-1) were drilled in a first phase between January 1980 and August 1982. Subsequently, PR-1 was deepened, and drilling began on PR-8 in 1984.
The Sierra La Primavera lies 15 km west of the city of Guadalajara (Fig. 1) between longitudes 103°28′ and 103°38′W and latitudes 20°32′ and 20°43′N, in a volcanic area of fumaroles and hot springs. The region forms part of a series of valleys, basins, and block mountains of mainly mid-Tertiary to Pliocene- Quaternary volcanic rocks. Drainage is parallel and dendritic; in the rainy season, intermittent streams carry water to the valleys and basins draining toward the Río Grande de Santiago in the north and the Río Ameca in the west, and thence to the Pacific Ocean.
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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.