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2-D tomographic imaging of velocities in the Wichita uplift-Anadarko basin region of southwestern Oklahoma

CENTER FOR LITHOSPHERIC STUDIES THE UNIVERSITY OF TEXAS AT DALLAS, P.O. BOX 688, RICHARDSON, TEXAS 75083

Abstract

In January of 1985, a densely-recorded, wide-aperture seismic experiment was performed by the University of Texas at El Paso and at Dallas, across the southwestern Oklahoma aulacogen. A two-dimensional P-wave velocity distribution is estimated for the Wichita uplift, the Anadarko basin, and the interface between them, by iterative tomographic imaging of travel-time picks from seven shots located near the 100-km-long recording line. The region that is imaged is roughly triangular in shape, with depth = 0 km at the ends of line and 15 km near its center. The main features that are revealed are a high-velocity (>6.8 km/sec) central core in the Wichita uplift and an asymmetrical Anadarko basin with decreasing velocities toward the basin axis. There are indications, within the uplift, of local high-velocity sills and a local low-velocity region that may be a remnant of normal crustal material.

This article has been cited by other articles:

				I. B. KANG and G. A. MCMECHAN Two-dimensional elastic pseudo-spectral modeling of wide-aperture seismic array data with application to the Wichita Uplift-Anadarko Basin region of southwestern Oklahoma Bulletin of the Seismological Society of America, December 1, 1990; 80(6A): 1677 - 1695. [Abstract] [PDF]