| Abstract: | Audiomagnetotelluric (AMT) data along thirteen profiles in Spring, Snake, and Three Lakes Valleys, and the corresponding two-dimensional (2-D) inverse models, are presented. The AMT method is a valuable tool for estimating the electrical resistivity of the Earth over depth ranges of a few meters to roughly one kilometer. It is important for revealing subsurface structure and stratigraphy within the Basin and Range province of eastern Nevada that can be used to define the geohydrologic framework of the region. We collected AMT data using the Geometrics StrataGem EH4 system. Profiles were 1.2 to 4.6 km in length with station spacing of 100-400 m. Data were recorded in a coordinate system parallel to and perpendicular to the assumed regional geologic strike direction. We show station locations, sounding curves of apparent resistivity, phase, and coherency, and 2-D models. The 2-D inverse models are computed from the transverse electric (TE), transverse magnetic (TM), and TE+TM mode data using the conjugate gradient, finite-difference method of Rodi and Mackie (2001). Preliminary interpretation of these models defines the structural framework of the basins and the resistivity contrasts between alluvial basin-fill, volcanic units, and carbonate/clastic rocks. |
| Genre: | USGS Numbered Series |
| ProdID: | 80095 |
| Citation Author: | McPhee, Darcy K.; Chuchel, Bruce A.; Pellerin, Louise |
| Citation Contributing Office: | USGS Geophysics Unit Menlo Park |
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| Citation Edition: | Version 1.0 |
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| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0400000 |
| Citation LatS: | 0383000 |
| Citation LonE: | -1140000 |
| Citation LonW: | -1150000 |
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| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | 47 p. |
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| Citation Public Comments: | In cooperation with the Southern Nevada Water Authority (SNWA) |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2007-1181 |
| Citation Search Results Text: | Audiomagnetotelluric Data and Two-Dimensional Models from Spring, Snake, and Three Lakes Valleys, Nevada; 2007; OFR; 2007-1181; McPhee, Darcy K.; Chuchel, Bruce A.; Pellerin, Louise |
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| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | Audiomagnetotelluric Data and Two-Dimensional Models from Spring, Snake, and Three Lakes Valleys, Nevada; 2007; OFR; 2007-1181; McPhee, Darcy K.; Chuchel, Bruce A.; Pellerin, Louise |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2007/1181/ |
| Date Other: | Wed, 11 Jul 2007 00:00 -0500 |
| Publisher: | Geological Survey (U.S.) |
