Skip to Main Content
GEOREF RECORD

Fault zone characteristics and basin complexity in the southern Salton Trough, California

Patricia Persaud, Yiran Ma, Joann M. Stock, John A. Hole, Gary S. Fuis and Liang Han
Fault zone characteristics and basin complexity in the southern Salton Trough, California
Geology (Boulder) (September 2016) 44 (9): 747-750

Abstract

Ongoing oblique slip at the Pacific-North America plate boundary in the Salton Trough produced the Imperial Valley (California, USA), a seismically active area with deformation distributed across a complex network of exposed and buried faults. To better understand the shallow crustal structure in this region and the connectivity of faults and seismicity lineaments, we used data primarily from the Salton Seismic Imaging Project to construct a three-dimensional P-wave velocity model down to 8 km depth and a velocity profile to 15 km depth, both at 1 km grid spacing. A V (sub P) = 5.65-5.85 km/s layer of possibly metamorphosed sediments within, and crystalline basement outside, the valley is locally as thick as 5 km, but is thickest and deepest in fault zones and near seismicity lineaments, suggesting a causative relationship between the low velocities and faulting. Both seismicity lineaments and surface faults control the structural architecture of the western part of the larger wedge-shaped basin, where two deep subbasins are located. We estimate basement depths, and show that high velocities at shallow depths and possible basement highs characterize the geothermal areas.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 44
Serial Issue: 9
Title: Fault zone characteristics and basin complexity in the southern Salton Trough, California
Affiliation: California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States
Pages: 747-750
Published: 201609
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 30
Accession Number: 2016-083473
Categories: Structural geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2016243
Illustration Description: illus. incl. geol. sketch maps
N31°00'00" - N34°00'00", W117°00'00" - W114°00'00"
Secondary Affiliation: Virginia Polytechnic Institute and State University, USA, United StatesU. S. Geological Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201640
Program Name: USGSOPNon-USGS publications with USGS authors
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal