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Brady, R., Wernicke, B., McNutt, M., Mutter, J. and Correa, G. (2000). Results of the Basin and Range Geoscientific Experiment (BARGE): A marine-style seismic reflection survey across the eastern boundary of the central Basin and Range Province. Geochemistry Geophysics Geosystems 1. doi: 10.1029/2000GC000078. issn: 1525-2027. |
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Approximately 120 km of marine-style deep seismic reflection data were shot during a survey on the waters of Lake Mead in southeastern Nevada. The survey extends from near the abrupt eastern edge of the Basin and Range Province (BRP) to a point ~80 km into the extended domain. Data quality throughout the survey ranged from fair to poor; the recorded data include significant towing noise and occasionally problematic diffractions and sideswipe from canyon walls. The upper 2--4 s of the data shows well-defined reflections from sedimentary fill, but below that point, reflectivity is weak. Lower crustal reflectivity is generally absent under the eastern part of the survey, with a slight increase in reflectivity to the west. The reflection Moho appears as a series of weakly defined, discontinuous reflections, most of which occur at 10--11 s. A particularly interesting feature of the data set is the relative lack of reflectivity from the lower crust, which is a region of strong reflectivity on other seismic reflection data sets from the BRP. |
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Abstract |
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Entire Document PDF |
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Keywords
Marine Geology and Geophysics, Marine seismics, Seismology, Continental crust, Tectonophysics, Continental tectonics—extensional, Information Related to Geographic Region, North America |
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Journal
Geochemistry Geophysics Geosystems |
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Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org |
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