Summary of Results of a Geological and Geophysical Investigation of the Geothermal Energy Potential of the Pilgrim Springs KGRA, Alaska
- Key words
- Exploration; USA; Alaska; Pilgrim Springs KGRA; Geological Surveys; Mapping; Hydrological Surveys; Springs; Geophysical Surveys; Electrical Conductivity; Seismic Noise; Geochemical Surveys; Geothermometers
- Location
- Pilgrim Springs, Alaska
- Conference
- Geothermal Resources Council Transactions
- Year
- 1980
- Session
- Exploration; Geological surveys; Geophysical surveys
- Language
- English
Abstract
Reconnaissance geological and geophysical studies indicate that the Pilgrim Springs, Alaska, area is underlain by an intermediate temperate, liquid dominated geothermal system of substantial magnitude. Initial exploratory drilling has confirmed the presence of the shallow, = 1-1.5 km2 hot water reservoir delineated by our geophysical surveys. Large artesian flow rates of 200 and 300-400 gallons/minute of 90°C water indicated that at least one good aquifer if present at shallow depths within this reservoir. Resistivity surveys suggest that the reservoir is approximately 50 m thick. Deeper hot water reservoirs may also be contained in the thick sedimentary section identified by seismic and gravity surveys, but they have not as yet been located by our initial resistivity surveys. The power presently being dissipated from the upper 50 m of the system is a minimum of 350 megawatts.
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