Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Conservation, 2009)

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Exploration Activity: Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Conservation, 2009)

Exploration Activity Details
Location Long Valley Caldera Geothermal Area
Exploration Technique Thermal Gradient Holes
Activity Date 1991 - 1991

Usefulness not useful
DOE-funding Unknown

 
Exploration Basis
The Oh Well-1 temperature-gradient hole was drilled to 664 m depth in December 1991 near the town of Mammoth Lakes in the western caldera.
 
Notes
A maximum temperature of < 85°C was encountered in the hole. Although the measured temperature gradient was slightly higher than typical background gradients within the caldera, impermeable Early Rhyolite units penetrated by the borehole lacked thermal fluid input and were considered unproductive.


Additional References