Lithospheric dismemberment and magmatic processes of the Great Basin–Colorado Plateau transition, Utah, implied from magnetotellurics

Abstract

[1] To illuminate rifting processes across the Transition Zone between the extensional Great Basin and stable Colorado Plateau interior, we collected an east-west profile of 117 wideband and 30 long-period magnetotelluric (MT) soundings along latitude 38.5 N from southeastern Nevada across Utah to the Colorado border. Regularized two-dimensional inversion shows a strong lower crustal conductor below the Great Basin and its Transition Zone in the 15–35 km depth range interpreted as reflecting modern basaltic underplating, hybridization, and hydrothermal fluid release. This structure explains most of the G Geochemistry Geophysics Geosystems

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Cite this paper

@inproceedings{Wannamaker2008LithosphericDA, title={Lithospheric dismemberment and magmatic processes of the Great Basin–Colorado Plateau transition, Utah, implied from magnetotellurics}, author={Philip E. Wannamaker and Derrick P. Hasterok and Jeffery M. Johnston and John A. Stodt and Timothy L. Sodergren and Louise Pellerin and Virginie Maris and William M. Doerner and Kim A. Groenewold and Martyn J . Unsworth}, year={2008} }