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The AAPG/Datapages Combined Publications Database

Tulsa Geological Society

Abstract


Tulsa Geological Society Digest
Vol. 33 (1965), Pages 292-292

Crustal Structure of Oklahoma: Abstract

Eysteinn Tryggvason1, Bob Qualls2

Abstract

During the summer of 1964 a long range seismic refraction profile was shot and recorded NE-SW across Oklahoma. This reversed profile was 376 km. long and extended from near Chelsea northeast of Tulsa to near Maniton southwest of Lawton. A model of the near surface layers of the earth fitting the observed Previous HitwaveNext Hit propagation consists of three horizontal layers in the crust and a horizontal boundary (moho) between the crust and the upper mantle. In addition there is a low Previous HitvelocityNext Hit surface layer of sedimentary rocks approximately 0.5 km. thick. The first crustal layer extends to a depth of 13.7 km. and has a P-Previous HitwaveNext Hit Previous HitvelocityNext Hit of 5.96 km./sec. An intermediate layer extends to a depth of 29.6 km. and has a P-Previous HitwaveNext Hit Previous HitvelocityNext Hit of 6.66 km./sec. The third crustal layer has a P-Previous HitwaveNext Hit Previous HitvelocityNext Hit of 7.20 km./sec. and extends down to moho at a depth of 50.9 km. Below moho the upper mantle Previous HitvelocityNext Hit is 8.32 km./sec. Compared with other continental areas, the observed upper mantle Previous HitvelocityNext Hit and the mean Previous HitvelocityTop in the crust is unusually high. The total thickness of the crust is also greater than in most continental areas, and greater than earlier estimates for Oklahoma.


 

Acknowledgments and Associated Footnotes

1 Univ. of Tulsa, Tulsa

2 Univ. of Tulsa, Tulsa

April 5, 1965

Copyright © 2006 by the Tulsa Geological Society