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Late Quaternary paleoseismology of the southern Steens fault zone, northern Nevada

Stephen F. Personius, Anthony J. Crone, Michael N. Machette, Shannon A. Mahan, Jai Bok Kyung, Hector Cisneros and David J. Lidke
Late Quaternary paleoseismology of the southern Steens fault zone, northern Nevada
Bulletin of the Seismological Society of America (October 2007) 97 (5): 1662-1678

Abstract

The 192-km-long Steens fault zone is the most prominent normal fault system in the northern Basin and Range province of western North America. We use trench mapping and radiometric dating to estimate displacements and timing of the last three surface-rupturing earthquakes (E1-E3) on the southern part of the fault south of Denio, Nevada. Coseismic displacements range from 1.1 to 2.2+ or -0.5 m, and radiometric ages indicate earthquake times of 11.5+ or -2.0 ka (E3), 6.1+ or -0.5 ka (E2), and 4.6+ or -1.0 ka (E1). These data yield recurrence intervals of 5.4+ or -2.1 k.y. between E3 and E2, 1.5+ or -1.1 k.y. between E2 and E1, and an elapsed time of 4.6+ or -1.0 k.y. since E1. The recurrence data yield variable interval slip rates (between 0.2+ or -0.22 and 1.5+ or -2.3 mm/yr), but slip rates averaged over the past approximately 18 k.y. (0.24+ or -0.06 mm/year) are similar to long-term (8.5-12.5 Ma) slip rates (0.2+ or -0.1 mm/yr) measured a few kilometers to the north. We infer from the lack of significant topographic relief across the fault in Bog Hot Valley that the fault zone is propagating southward and may now be connected with a fault at the northwestern end of the Pine Forest Range. Displacements documented in the trench and a rupture length of 37 km indicate a history of three latest Quaternary earthquakes with magnitudes of M 6.6-7.1 on the southern part of the Steens fault zone.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 97
Serial Issue: 5
Title: Late Quaternary paleoseismology of the southern Steens fault zone, northern Nevada
Affiliation: U. S. Geological Survey, Denver, CO, United States
Pages: 1662-1678
Published: 200710
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 72
Accession Number: 2007-124326
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 3 tables, sketch maps
N41°45'00" - N41°57'30", W118°50'60" - W118°37'30"
Secondary Affiliation: Korea National University of Education, KOR, South KoreaUniversidad Nacional de San Luis, ARG, Argentina
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200750
Program Name: USGSOPNon-USGS publications with USGS authors
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