Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1978)
Exploration Activity: Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1978)
|Exploration Activity Details|
|Location||Long Valley Caldera Geothermal Area|
|Exploration Technique||Thermal Gradient Holes|
|Activity Date||1978 - 1985|
Thermal gradient drilling also continued during this period, consisting of several holes including:
- The CH8-10 thermal-gradient holes drilled by the U.S. Geological Survey prior to 1978 to relatively shallow depths ranging from about 55 to 290 m, with maximum encountered temperatures ranging from about 5 to 104°C
- The LVFU 13-21 thermal-gradient hole drilled on the Resurgent Dome by Union Oil Company, approximately _ km south and east of the future site of the Long Valley Exploratory Well (LVEW)
- Thermal-gradient holes 28-29 and 34-29, and the 48-29 observation well drilled by Oxy Santa Fe in December 1985 under the CA-11667 lease.
In the caldera's east moat, just south of Hot Creek gorge, a temperature reversal was detected in the CH10 well, providing additional evidence supporting the eastward flow of thermal water through the caldera groundwater system.
- Michael L. Sorey, Robert Edward Lewis, F.H. Olmsted (1978) The Hydrothermal System of Long Valley Caldera, California