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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2002
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56841409 |
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Table of Contents:
- Hydrodynamic model of Los Humeros geothermal field, Mexico, based on geochemical, mineralogical and isotopic data B. I. Romero E. Portugal G. Izquierdo R. M. Barragán Ciencias de la Tierra mineralogy Los Humeros Geochemistry stable isotopes geothermal field The local basement of Los Humeros geothermal field is a Paleozoic metamorphic complex, a Mesozoic folded sedimentarysequence formed by chlorite-muscovite shales, lower Tertiary syenitic and granodioritic intrusions and Pliocene andesites. Basedon pressure test logs in the central collapse area two geothermal reservoirs were recognized: A reservoir of low liquid saturationlocated at depth and a shallow (two phase) reservoir dominated by liquid clearly related to the hydrothermal mineralogy. Geochemicaldata confirm the presence of two aquifers: An upper, neutral pH aquifer with temperature around 280ºC, and a deeper one withhigher temperature. The chemical classification shows that waters are bicarbonate and chloride types. Mineralogical studiesidentified a zone of typical hydrothermal alteration, considered as high-rank low-intensity, and another zone where deep wellslocated in the central collapse zone show no alteration but high temperatures. The mineralogical evidence confirms the boundariesof the two reservoirs in the system. Isotopic results of C, H and O in fluids from producing wells and related natural springs wereused to study the dynamics of the system. The data allowed a preliminary model to be postulated. 2002 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56841409 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.41