HR: 1340h
AN: T33A-1151    [Abstracts]
TI: Magnetotelluric Transect Through Yosemite National Park Provides a First Look at Deep Crust and Upper Mantle Electrical Conductivity
AU: Ostos, L
EM: linda.ostos@gmail.com
AF: Department of Earth Sciences, University of California, Riverside, CA 92521, United States
AU: * Park, S K
EM: magneto@ucrmt.ucr.edu
AF: Department of Earth Sciences, University of California, Riverside, CA 92521, United States
AB: The first of three east-west regional transects has been completed as part of an NSF-supported study to examine the nature of the lithosphere beneath the Sierra Nevada. This transect from the Nevada border to the San Joaquin Valley through Yosemite National Park consists of 15 long period magnetotelluric soundings spaced approximately 20 km apart. Data were recorded with instruments from the EMSOC (Electromagnetic Studies of Continents) consortium and processed using both local and distant remote referencing. Broadband data were also acquired at each long period site, so magnetotelluric transfer functions at periods from 0.01 to 20,000 s were sampled. Initial models of the electrical structure reveal the extent to which Basin and Range extensional processes encroach on the Sierra Nevada batholith.
DE: 0925 Magnetic and electrical methods (5109)
DE: 8110 Continental tectonics: general (0905)
DE: 8124 Earth's interior: composition and state (1212, 7207, 7208, 8105)
SC: Tectonophysics [T]
MN: 2007 Fall Meeting