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Title: (Sulfide-oxide-silicate phase equilibria and associated fluid inclusion properties in the Salton Sea geothermal system, California)

Our studies involved petrographic, fluid inclusion, geochemical and stable isotopic studies of drillcores and fluids from the Salton Sea geothermal system. Our initial studies revealed the presence of previously-unrecognized evaporitic anhydrite at depth throughout the geothermal system. The high salinity of the Salton Sea geothermal brines previously had been attributed to low-temperature dissolution of surficial evaporitic deposits by meteoric waters. Our microthermometric studies of halite--containing fluid inclusions in the meta-evaporites indicated that the high salinity of the geothermal brines is derived in part from the hydrothermal metamorphism of relatively deeply-buried salt and evaporites. In addition, our research concentrated on mineralized fractures in drillcores.
Authors:
Publication Date:
OSTI Identifier:
6993946
Report Number(s):
DOE/ER/13408-1; UCR/IGPP--88/27
ON: DE90012891
DOE Contract Number:
FG03-85ER13408
Resource Type:
Technical Report
Research Org:
California Univ., Riverside, CA (USA). Inst. of Geophysics and Planetary Physics
Sponsoring Org:
DOE/ER
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 58 GEOSCIENCES; SALTON SEA GEOTHERMAL FIELD; GEOCHEMISTRY; ANHYDRITE; BRINES; CALIFORNIA; CHEMICAL ANALYSIS; CHEMICAL COMPOSITION; DRILL CORES; GEOTHERMAL FLUIDS; GEOTHERMAL WELLS; HYDROTHERMAL SYSTEMS; ISOTOPE RATIO; PROGRESS REPORT; ROCK-FLUID INTERACTIONS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM SULFATES; CHEMISTRY; DOCUMENT TYPES; ENERGY SYSTEMS; FEDERAL REGION IX; FLUIDS; GEOTHERMAL FIELDS; GEOTHERMAL SYSTEMS; MINERALS; NORTH AMERICA; OXYGEN COMPOUNDS; SULFATE MINERALS; SULFATES; SULFUR COMPOUNDS; USA; WELLS Geothermal Legacy 152003* -- Geothermal Data & Theory-- Rock-Water-Gas Interactions; 580000 -- Geosciences