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DOI 10.2172/5791657
Title Geothermal resources of Sao Miguel Island, Azores, Portugal
Creator/Author Duffield, W.A. ; Muffler, L.J.P.
Publication Date1984 Jan 01
OSTI IdentifierOSTI ID: 5791657; Legacy ID: TI85901331
Report Number(s)USGS-OFR-84-287
DOI10.2172/5791657
Other Number(s)Other: ON: TI85901331
Resource TypeTechnical Report
Research OrgGeological Survey, Flagstaff, AZ (USA); Geological Survey, Menlo Park, CA (USA); Geological Survey, Denver, CO (USA); Geological Survey, Volcanoes National Park, HI (USA)
Subject15 GEOTHERMAL ENERGY; AZORES ISLANDS; GEOTHERMAL RESOURCES; GEOTHERMAL FLUIDS; CHEMICAL COMPOSITION; VOLCANOES; HYDROTHERMAL SYSTEMS; GEOCHEMISTRY; ISOTOPE DATING; MAGNETOTELLURIC SURVEYS; PERMEABILITY; QUATERNARY PERIOD; RESERVOIR ROCK; THERMODYNAMICS; AGE ESTIMATION; CENOZOIC ERA; CHEMISTRY; ELECTRICAL SURVEYS; ELECTROMAGNETIC SURVEYS; ENERGY SYSTEMS; EUROPE; FLUIDS; GEOLOGIC AGES; GEOPHYSICAL SURVEYS; GEOTHERMAL SYSTEMS; ISLANDS; PORTUGAL; RESOURCES; SURVEYS; WESTERN EUROPE
Related SubjectGeothermal Legacy
Description/AbstractGeothermal studies were carried out on the island of Sao Miguel, Azores to characterize the nature of the resource, to estimate its magnitude, and to identify target areas toward which exploration and developmental drilling might be directed. The main geothermal resource areas are Furnas, Agua de Pau, and Sete Cidades, three Quaternary silicic volcanic centers characterized by summit calderas beneath which magmatic heat sources provide thermal energy to overlying hydrothermal convection systems. For each of the systems, the studies have defined the size of the system, the subsurface temperature, the thermodynamic state of fluid in the system, the chemical composition of the fluid, and permeable parts of the system. 8 figs. (ACR)
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: Pages: 22
Availability US Geological Survey, Box 25425, Denver Federal Center, Denver, CO 80225.
System Entry Date2007 May 14
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