Volcanic stratigraphy of the Los Azufres geothermal area, Mexico

Element mobility during the hydrothermal alteration of rhyolitic rocks of the Los Azufres geothermal field, Mexico

“…1, inset), 200 km WNW of Mexico City. Although the high geothermal potential of the LAGF has prompted a large number of studies, only a few papers have been published on the geochemistry of the rocks in the area (Cathelineau et al, 1985;Dobson and Mahood, 1985;Pradal and Robin, 1994;TorresAlvarado and Satir, 1998). These papers, however, report on major element data only, occasionally providing information on a few trace elements.…”

Three-dimensional thermal sensitivity analysis of cooling of a magma chamber in the Los Azufres geothermal field, Michoacán, Mexico

“…The geology and geochemistry of the area were reported by Campos-Enríquez et al (2005), Cathelineau et al (1987), Dobson and Mahood (1985), Pandarinath (2011), Pandarinath et al (2008, Pradal and Robin (1994), Verma (1985), Verma and Andaverde (1996), and Verma et al (2005), among others. The pre-volcanic basement consists of shales, sandstones, and conglomerates of Eocene to Oligocene age.…”

“…The LAGF is located in the state of Michoacán, about 200 km NW of Mexico City, between approximately 100°38′ and 100°43′ W and 19°50′ and 19°45′ N, and covers an area of about 72 km 2 (Dobson and Mahood 1985). The geology and geochemistry of the area were reported by Campos-Enríquez et al (2005), Cathelineau et al (1987), Dobson and Mahood (1985), Pandarinath (2011), Pandarinath et al (2008, Pradal and Robin (1994), Verma (1985), Verma and Andaverde (1996), and Verma et al (2005), among others.…”

“…Cubic polynomial equations were fitted to the appropriate simulated results. Similarly, six runs were carried out for discretization time of 20, 10, and 1 year, mesh size of 0.20 and 0.10 km, and total simulation time of 0.40 million years representing the entire eruption history of the main volcanic events (Dobson and Mahood 1985;Verma and Andaverde 1996). These runs were obtained for 5 km depth of the top of magma chamber, 600 km 3 of chamber volume, and three magma recharge events at 0.34 Ma (20 km 3 of magma), 0.22 Ma (12 km 3 ), and 0.026 Ma (5 km 3 ).…”

Radium depletion and 210Pb/226Ra disequilibrium of Mar^|^iacute;taro hydrothermal deposits, Los Azufres geothermal field, Mexico

“…Most of the geothermal activity is concentrated in the southern portion of a large (80 km diameter) caldera within the Morelia-Acambay rift, inside the Trans-Mexican Volcanic Belt (Pasquaré et al, 1988;Ferrari et al, 1991). The 3000 m thick geothermal reservoir formed in the fractured, Upper Miocene to Pliocene andesite and basalt complex called the Mil Cumbres andesite (Dobson and Mahood, 1985). The reservoir is sealed to the surface by a dominantly rhyolitic sequence of Pleistocene age (Pradal and Robin, 1994).…”