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The AAPG/Datapages Combined Publications Database
Utah Geological Association
Abstract
An Overview of the Geology and Geochemistry of the Roosevelt Hot Springs Geothermal System, Utah
Abstract
The Roosevelt Hot Springs geothermal system is the largest and most important geothermal resource in the eastern Basin and Range Province. This field is hosted in granitic and metamorphic basement rocks that appear to be heated by recent intrusions related to 0.5-0.8 Ma rhyolite domes. The resource, which is operated by the Intermountain Geothermal Company, a subsidiary of California Energy Company, Inc., produces 26 Mw (gross) from a power plant brought on line in 1984.
Roosevelt Hot Springs has been the focus of numerous investigations since the early 1970’s by exploration companies and academic groups. In 1977-1979, a large amount of geoscientific data were placed in the public domain through the Department of Energy’s Industry Coupled Program. In support of this program, detailed mapping of the field and surrounding areas, geochemical soil and downhole studies, interpretation of the fluid chemistry, and various geophysical investigations were undertaken. The results of these and other geological and geochemical studies are described in this paper.
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