Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada
Conference Paper: Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada
AbstractA 'nested graben' structural model, in which multiple faults successively displace rocks downward to the deepest part of the basin, is supported by recent field geologic analysis and correlation of results to geophysical data for Dixie Valley. Aerial photographic analysis and detailed field mapping provide strong evidence for a deep graben separated from the ranges to the east and west by multiple normal faults that affect the Tertiary/Quaternary basin-fill sediments. Correlation with seismic reflection and gravity surveys shows that some faults recognized by minor displacements at the surface produce significant stratigraphic offsets at depth in basin-fill sediments and help to explain gravity gradients displaced basin- ward from the range-front. The concept of a complex series of faults (both synthetic and antithetic) separating the Stillwater Range from Dixie Valley allows for the possibility that the geothermal circulation encompasses multiple faults both inboard and outboard of the range-front fault. This geometry increases the exploration potential of the area by providing additional possibilities for fault-controlled permeability and larger volumes of permeable rocks.
- Richard P. Smith, Kenneth W. Wisianz and David D. BlackweIl
- GRC, 2001
- Not Provided
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Richard P. Smith,Kenneth W. Wisianz,David D. BlackweIl. 2001. Geologic And Geophysical Evidence For Intra-Basin And Footwall Faulting At Dixie Valley, Nevada. In: (!) ; (!) ; (!) . (!) : GRC; p. (!)