Exploratory Boreholes At Long Valley Caldera Geothermal Area (Suemnicht, Et Al., 2007)
Exploration Activity: Exploratory Boreholes At Long Valley Caldera Geothermal Area (Suemnicht, Et Al., 2007)
|Exploration Activity Details|
|Location||Long Valley Caldera Geothermal Area|
|Exploration Technique||Exploratory Boreholes|
|Activity Date||1992 - 2002|
Mammoth Pacific LP drilled several intermediate-depth exploration wells in 1992 (wells 66-31 and 38-32) and 2002 (well BC 12-31) to further evaluate the geothermal potential of the caldera's south moat.
The 38-32 core hole was drilled to 353 m depth <1 km south of Casa Diablo. The BC 12-31 core hole was drilled to 600 m depth approximately 2 km west of the geothermal power plants. The excellent quality of these core holes yielded considerable new information into the stratigraphy beneath the southern moat zone, including evidence supporting the existence of a post-eruption landslide block that might act as an impermeable layer within the hydrothermal flow system.
- Gene A. Suemnicht, Michael L. Sorey, Joseph N. Moore, Robert Sullivan (2007) The Shallow Hydrothermal System of Long Valley Caldera, California