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Title: Chemical Variations in the Rocks of La Primavera Geothermal Field (Mexico) Related with Hydrothermal Alteration

The origin and fate of the components dissolved in the geothermal fluids are of great importance in the study of epithermal deposits, and in the environmental considerations for exploitation of geothermal fields. The chemical study of La Primavera geothermal field in Mexico has environmental importance due to the high arsenic concentration observed in the thermal water and the possible contamination of aquifers in the area. The variations in the chemistry of all altered samples with respect to unaltered samples indicates depletion of manganese, and the alkalis; and enrichment in iron and magnesium. Most samples show an enrichment in aluminum and titanium, and depletion in silica and calcium. Trace elements follow different trends at various depths: shallow depths are more favorable for deposition of the analyzed trace elements than the surface or the deep part of the reservoir.
Authors:
; ;
Publication Date:
OSTI Identifier:
895915
Report Number(s):
GEO-PROC-95-02
TRN: US200703%%793
Resource Type:
Conference
Resource Relation:
Conference: Proceedings of The 17th New Zealand Geothermal Workshop 1995
Research Org:
Instituto de Geofiscia, UNAM. Mexico, D.F.; Facultad de Ingenieria, UNAM. Mexico, D.F.; Instituto de Geologia, UNAM. Mexico, D.F.
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; ALUMINIUM; AQUIFERS; ARSENIC; CALCIUM; CHEMISTRY; CONTAMINATION; DEPOSITION; ELEMENTS; GEOTHERMAL FIELDS; GEOTHERMAL FLUIDS; HYDROTHERMAL ALTERATION; HYDROXIDES; IRON; MAGNESIUM; MANGANESE; SILICA; TITANIUM; TRACE AMOUNTS; Geothermal Legacy