Mineral zonation and stable isotope geochemistry of a production well in the Geysers Geothermal field, California

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Trans. - Geotherm. Resour. Counc.; (United States)

OSTI ID:6927002

Sternfeld, J N; Elders, W A

Petrologic and stable isotope geochemical studies were conducted on well cuttings from a Sulphur Banks tract steam well in the Geysers. The observed hydrothermal mineral zonation is indicative of an extremely hot (>300/sup 0/C) water-dominated geothermal system characterized by high fluid flow associated with fault contacts. Strata within the steam reservoir are not distinguished by diagnostic steam-derived secondary alteration products. However, a late stage generation of calcite was interpreted to have been deposited during the transition of the reservoir fluid to the vapor phase. The distribution of this material is restricted to a shallow zone (<600m) corresponding to the shallow steam anomaly reported in the Sulphur Banks area.

• Research Organization: Institute of Geophysics and Planetary Physics University of California, Riverside, CA
• DOE Contract Number: AT03-80SF11458
• OSTI ID: 6927002
• Journal Information: Trans. - Geotherm. Resour. Counc.; (United States), Journal Name: Trans. - Geotherm. Resour. Counc.; (United States) Vol. 6; ISSN TGRCD
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150302* -- Geothermal Exploration &amp; Exploration Technology-- Geochemical Techniques &amp; Surveys
CALIFORNIA
CHEMICAL COMPOSITION
CHEMISTRY
ENERGY SYSTEMS
FEDERAL REGION IX
FLUIDS
GEOCHEMICAL SURVEYS
GEOCHEMISTRY
GEOTHERMAL FIELDS
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
GEOTHERMAL WELLS
GEYSERS GEOTHERMAL FIELD
HETEROGENEOUS EFFECTS
HOT-WATER SYSTEMS
HYDROTHERMAL SYSTEMS
ISOTOPE RATIO
MINERALS
NORTH AMERICA
SAMPLING
SURVEYS
USA
WATER CHEMISTRY
WELLS