[1] Radar interferometry (InSAR), field measurements and creepmeters reveal surface slip on multiple faults in the Imperial Valley triggered by the main shock of the 4 April 2010 El Mayor‐Cucapah Mw 7.2 earthquake. Co‐seismic offsets occurred on the San Andreas, Superstition Hills, Imperial, Elmore Ranch, Wienert, Coyote Creek, Elsinore, Yuha, and several minor faults near the town of Ocotillo ...

Hydrothermally altered samples from outcrops along the eastern Stillwater Range (NV), and scale and vein samples from Dixie Valley geothermal wells were collected for fluid-inclusion analyses. Fluidinclusion microthermometry and gas analysis by quadropole mass spectrometry were applied to establish the chemistry of the fluids trapped during alteration. Relationships between CO2/CH4, N2/Ar, and ...

Neoproterozoic sedimentary successions worldwide display evidence for multiple low-latitude glacial events and continental rifting episodes related to the fragmentation of the supercontinent Rodinia. In Death Valley, eastern California, these events are represented by two intervals of glacial diamictite and two episodes of synsedimentary extensional faulting in the Kingston Peak Formation. Deep...

To determine factors controlling permeability variations within and adjacent to a fault-hosted geothermal reservoir at Dixie Valley, Nevada, we conducted borehole televiewer observations of wellbore failure (breakouts and cooling cracks) together with hydraulic fracturing stress measurements in six wells drilled into the Stillwater fault zone at depths of 2-3 km. Measurements in highly permeabl...

Synthesis of geodetic and seismological results for the 1979 Imperial Valley earthquake is approached using three-dimensional finite element modeling techniques. The displacements and stresses are calculated elastically throughout the modeled region. The vertical elastic structure in the model is derived from compressional and shear wave velocities as used in the seismic data analysis (Fuis et ...

[1] Large-scale crustal deformation in the Levant is mainly related to the DST and the CFS. The former is an active left lateral transform, bounding the Arabian plate and the Sinai sub-plate, and the latter branches out of the former and separates the Sinai sub-plate into two tectonic domains. In this study we obtain the velocities of 33 permanent GPS stations and 145 survey stations that were ...

HYDROLOGIC PROPERTIES OF THE DIXIE VALLEY, NEVADA, GEOTHERMAL RESERVOIR FROM WELL-TEST ANALYSES R.H. Morinl, S.H. Hickman2, C.A. Barton3, A.M. Shapird, W.R. Benoits, J.H. Sass6 1U.S. Geological Survey, Denver, CO 80225, USA [email protected] 2U.S. Geological Survey, Menlo Park, CA 94025, USA [email protected] 3Stanford University, Dept. of Geophysics, Stanford, CA 94305, USA barton@ pan...

The potential for basin amplification of ground motion from significant seismic sources 100-200 km (62-124 mi.) from the Las Vegas Valley (such as the Death Valley Fault System) and Quaternary faults in the valley could provide sufficient energy to cause liquefaction. Key criteria of liquefiable soils coupled with a shallow groundwater table (less than 15 m (50 ft)) are met at several sites in ...