Crustal and upper mantle velocity structure of the Salton Trough, southeast California
Article Abstract:
A wide angle seismic transect across the Salton Trough, Basin and Range Province, southeast California, shows that the crust is thin under the Salton Trough and thick under the Chocolate Mountains to the northwest. There is a deep, young basin beneath the axis of the Salton Trough at the Imperial Valley and a shallow basin under the Colorado River. A regional high-velocity layer is present between 15 km under the surface and the base of the crust below the Salton Trough. The mantle and crust structure is due to a Basin and Range extension during Miocene and a still active ocean basin rifting.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1996
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Host rock rheology controls on the emplacement of tabular intrusions: implications for underplating of extending crust
Article Abstract:
An analysis of rheological conditions affecting tabular intrusions is done. Pooling, ponding and horizonal basaltic magma intrusion into the crystalline crust is paradoxical because stress conditions favoring them do not allow room for their formation. Crust and upper mantle rigid zones expand under stress while ductile regions flow with tectonic forces. The difference in reactions between crust and upper mantle affects tabular intrusions.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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More than one way to stretch: a tectonic model for extension along the plume track of the Yellowstone hotspot and adjacent basin and range province
Article Abstract:
A study was conducted on the extensional deformation of the Basin and Range Province surrounding the eastern Snake River Plain of southern Idaho. Strain rates were observed to be much higher than the elastic limits of rocks coupled to the Basin and Range. The results indicate that the extension of the plain is through a nearly aseismic process. Volcanic rift zones and subsurface dikes also provide evidence of the extension.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1998
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