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Book Chapter

Cocorp Seismic Traverse Across the Rio Grande Rift

By
L.D. Brown
L.D. Brown
Department of Geological Sciences, Cornell University
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S. Kaufman
S. Kaufman
Department of Geological Sciences, Cornell University
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J.E. Oliver
J.E. Oliver
Department of Geological Sciences, Cornell University
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Published:
January 01, 1983

Abstract

COCORP's deep seismic reflection surveys in the Rio Grande Rift of central New Mexico consist of six lines recorded in 1975 and 1976 (Figure 1). Two of these, lines 1 and 1A, constitute an east-west traverse across the southern end of the Albuquerque-Belen basin. Although collected during an early stage of the COCORP program when economic constraints limited the amount of 3D control which could be obtained and data processing was less intensive, these seismic sections clearly map substantial buried structural relief, with the Albuquerque basin separated into two subgrabens by a central buried horst. Normal faulting in the eastern part of the rift may have been influenced by pre-existing Laramide thrust faults. Perhaps the most unique feature of these deep seismic data is evidence of an unusually strong mid-crustal reflection which is interpreted to correspond to an active magma body. This deep magma appears to have accumulated as series of sills beneath a mid-crustal barrier. The following summary is abstracted from a fuller discussion of the COCORP New Mexico results reported by Brown et al (1980).

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Contents

AAPG Studies in Geology

Seismic Expression of Structural Styles: A Picture and Work Atlas. Volume 1–The Layered Earth, Volume 2–Tectonics Of Extensional Provinces, & Volume 3–Tectonics Of Compressional Provinces

A. W. Bally
A. W. Bally
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American Association of Petroleum Geologists
Volume
15
ISBN electronic:
9781629810188
Publication date:
January 01, 1983

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