Direct-Current Resistivity Survey At Long Valley Caldera Geothermal Area (Pribnow, Et Al., 2003)
Exploration Activity: Direct-Current Resistivity Survey At Long Valley Caldera Geothermal Area (Pribnow, Et Al., 2003)
|Exploration Activity Details|
|Location||Long Valley Caldera Geothermal Area|
|Exploration Technique||Direct-Current Resistivity Survey|
|Activity Date||- 2003|
"DC electrical sounding measurements provide a 2-D image of the resistivity distribution beneath Long Valley Caldera. Conductive zones and SP anomalies correlate with the location of known faults in agreement with previous electrical surveys of this area. The resistivity structure in the western part of the caldera with two prominent high conductive features reflects a present-day shallow hydrothermal system that is also observed in temperature logs (Sorey et al., 1991). We conclude that the part of the resurgent dome to a depth of 2.0^2.5 km is not part of the shallow hydrothermal system identified to the west. The deeper conductive regions here may be caused by hydrothermal alteration or a fluid filled fracture system."
- Daniel F. C. Pribnow, Claudia Schutze, Suzanne J. Hurter, Christina Flechsig, John H. Sass (October 2003) Fluid Flow In The Resurgent Dome Of Long Valley Caldera- Implications From Thermal Data And Deep Electrical Sounding