Results 121 to 130 of about 179 (154)
Geology of Los Azufres Caldera, Mexico, and its relationships with regional tectonics [PDF]
Journal of Volcanology and Geothermal Research, 1991 Ferrari, L., Gardufio, V.H., Pasquar6, G. and Tibaldi, A., 1991. Geology of Los Azufres caldera, Mexico, and its relationships with regional tectonics. In: S.P Verma (Editor), Calderas: Genesis, Structure and Unrest. J. Volcanol. Geotherm. Res., 47: 129-148. The Los Azufres geothermal field is one of several silicic centres of the Mexican Volcanic Belt
Luca Ferrari, Alessandro Tibaldi
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Volcanic stratigraphy of the Los Azufres geothermal area, Mexico
Journal of Volcanology and Geothermal Research, 1985Abstract The Los Azufres volcanic center, located 200 km northwest of Mexico City, is one of a number of Pleistocene silicic volcanic centers with active geothermal systems that lie north of the axis of the Mexican Neovolcanic Belt. Silicic volcanism began approximately 1 m.y. ago with eruption of the Agua Fria rhyodacite to high-silica rhyolite lava
Patrick F. Dobson, Gail A. Mahood
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Development of a numerical hydraulic model of the Los Azufres steam pipeline network
Geothermics, 2009The development and documentation of a hydraulic model of the steam pipeline network at the Los Azufres geothermal field is presented, as well as the results obtained using one- and two-phase numerical simulators. Flow simulations were performed to determine pressure and heat losses, flow directions and velocities in that network.
Alfonso García-Gutiérrez +5 more
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Origin of rainwater acidity near the Los Azufres geothermal field, Mexico
Geothermics, 2000The chemical and isotopic compositions of rainwater were monitored at Los Azufres geothermal field (88 MWe) and its surroundings during May – September 1995, which is the rainy season. Samples were collected from eight sites: three within the field, three in its surroundings and two sufficiently far from the field such that they have no geothermal ...
Mahendra P Verma
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Residual steam to energy: a project for Los Azufres geothermal field, Mexico
Geothermics, 1999More than 500 t/h of residual steam are discharged into the atmosphere at Los Azufres geothermal field. Steam comes from nine back-pressure turbines that are at present generating 45 MW. A significant increase in output can be obtained if low pressure turbines are installed to expand residual steam from atmospheric pressure up to a vacuum pressure in ...
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A chlorite solid solution geothermometer the Los Azufres (Mexico) geothermal system
Contributions to Mineralogy and Petrology, 1985Chlorite constitutes a major hydrothermal alteration product of metamorphism of andesites, in the active geothermal system of Los Azufres (Mexico). Electron microprobe analyses performed on a set of crystals from each sample show wide variations in composition. Correlation coefficients among chemical constituents were calculated.
Cathelineau, Michel, Nieva, David
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Chemical Equilibrium in Hydrothermal Systems: The Case of Los Azufres Geothermal Field, Mexico
International Geology Review, 2002This work presents a review of the geological, hydrogeochemical, and mineralogical information related to the Los Azufres geothermal field, along with new isotopic data from hydrothermal calcite and quartz. The equilibrium state between present-day geothermal fluids and hydrothermal mineral phases in this field was examined using mineralogical ...
Ignacio S Torres-Alvarado
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Thermodynamic evolution of the Los Azufres, Mexico, geothermal reservoir from 1982 to 2002
Geothermics, 2005An investigation has been made of the response of the Los Azufres geothermal reservoir to 20 years of development, beginning in 1982. The simulator WELFLO was used to characterize the thermodynamic conditions of the reservoir fluids. The first response to exploitation consisted of a decrease in pressure and an increase in enthalpy.
Víctor Manuel Arellano +2 more
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Elemental analysis of the geothermic microecology of the Los Azufres (Mexico) volcanic complex
Journal of Radioanalytical and Nuclear Chemistry, 2019Three geothermal microecologies, constituted of fumaroles, hydrothermal springs and the native volcanic superstratum at the Los Azufres (Mexico) volcanic complex, have been analysed for the concentrations of Cd, Hg, Pb, Th and U in the tissues and rhizospheric soils of the extremophilic plants that colonise the fumaroles, as well as in the sediments ...
Waleed A. Abuhani +6 more
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Contributions to Mineralogy and Petrology, 1988
Smectite, illite, celadonite and chlorite are the major products of alteration of rhyolites and andesites, in the upper part of the Los Azufres geothermal system. Changes in mineral assemblages and composition of phases are observed as a function of depth and host rock lithology. Two different sequences characterize the rhyolites and the andesites from
Cathelineau, M., Izquierdo, G.
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Smectite, illite, celadonite and chlorite are the major products of alteration of rhyolites and andesites, in the upper part of the Los Azufres geothermal system. Changes in mineral assemblages and composition of phases are observed as a function of depth and host rock lithology. Two different sequences characterize the rhyolites and the andesites from
Cathelineau, M., Izquierdo, G.
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