HR: 0804h
AN: NS11E-0837    [Abstracts]
TI: Preliminary Pseudo 3-D Imagery of the State Line Fault, Stewart Valley, Nevada Using Seismic Reflection Data
AU: * Saldaña, S C
EM: ssaldana@ees.nmt.edu
AF: Earth and Environmental Science Department, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801, United States
AU: Snelson, C M
EM: snelson@ees.nmt.edu
AF: Earth and Environmental Science Department, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801, United States
AU: Taylor, W J
EM: wanda.taylor@unlv.edu
AF: Department of Geoscience, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AU: Beachly, M
EM: mbeachly@hastings.edu
AF: Department of Physics, Hastings College, 710 N. Turner, Hastings, NE 68901, United States
AU: Cox, C M
EM: cmc3h@mtsu.edu
AF: Department of Geoscience, Middle Tennessee State University, 1500 Greenland Dr., Murfreesboro, TN 37172, United States
AU: Davis, R
EM: davisr17@unlv.nevada.edu
AF: Department of Geoscience, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AU: Stropky, M
EM: stropkym@unlv.nevada.edu
AF: Department of Geoscience, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AU: Phillips, R
EM: phill203@nevada.edu
AF: Department of Civil and Environmental Engineering, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AU: Robins, C
EM: robinsc@unlv.nevada.edu
AF: Department of Geoscience, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AU: Cothrun, C
EM: Chris.Cothrun@unlv.edu
AF: Department of Civil and Environmental Engineering, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154, United States
AB: The Pahrump Fault system is located in the central Basin and Range region and consists of three main fault zones: the Nopah range front fault zone, the State Line fault zone and the Spring Mountains range fault zone. The State Line fault zone is made up north-west trending dextral strike-slip faults that run parallel to the Nevada- California border. Previous geologic and geophysical studies conducted in and around Stewart Valley, located ~90 km from Las Vegas, Nevada, have constrained the location of the State Line fault zone to within a few kilometers. The goals of this project were to use seismic methods to definitively locate the northwestern most trace of the State Line fault and produce pseudo 3-D seismic cross-sections that can then be used to characterize the subsurface geometry and determine the slip of the State Line fault. During July 2007, four seismic lines were acquired in Stewart Valley: two normal and two parallel to the mapped traces of the State Line fault. Presented here are preliminary results from the two seismic lines acquired normal to the fault. These lines were acquired utilizing a 144-channel geode system with each of the 4.5 Hz vertical geophones set out at 5 m intervals to produce a 595 m long profile to the north and a 715 m long profile to the south. The vibroseis was programmed to produce an 8 s linear sweep from 20-160 Hz. These data returned excellent signal to noise and reveal subsurface lithology that will subsequently be used to resolve the subsurface geometry of the State Line fault. This knowledge will then enhance our understanding of the evolution of the State Line fault. Knowing how the State Line fault has evolved gives insight into the stick-slip fault evolution for the region and may improve understanding of how stress has been partitioned from larger strike-slip systems such as the San Andreas fault.
DE: 0910 Data processing
DE: 0935 Seismic methods (3025, 7294)
DE: 0994 Instruments and techniques
DE: 7299 General or miscellaneous
DE: 8010 Fractures and faults
SC: Near-Surface Geophysics [NS]
MN: 2007 Fall Meeting