Late cenozoic displacement transfer in the eastern Sylvania Mountain fault system and Lida Valley pull-apart basin, southwestern Nevada, based on 3D gravity depth inversion and forward models | Posted on:2015-04-14 | Degree:M.S | Type:Thesis | University:The University of Texas at Dallas | Candidate:Dunn, Sarah Beth | Full Text:PDF | GTID:2470390020950293 | Subject:Geology | Abstract/Summary: | | The Sylvania Mountain fault system transfers displacement from the Eastern California shear zone to the Walker Lane as it stretches from the Furnace Creek-Fish Lake Valley fault in southwestern Nevada. Strands of the structure bound the Lida Valley pull-apart basin which, based on gravity analysis, is internally dissected by a system of faults. The subsurface geometry was determined from our gravity survey with data inverted in 3D. Geologic cross-sections were used to forward model the gravity. Mapped faults and inferred structures were combined to construct the subsurface geometry and evaluate a fault displacement budget. By conserving fault slip, the restoration of the pre-Neogene basement to a reference datum indicates a cumulative vertical displacement of 2.3 to 2.5 km since onset of extension. Vertical displacements were used to compute the horizontal component of extension, ranging from 1.3 to 1.4 km. | Keywords/Search Tags: | Displacement, Fault, System, Gravity, Valley | | Related items |
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