Geometry, kinematics, and mechanics of the interaction between strike-slip and normal faults in active rifts: An example from the Quaternary-active Kane Springs Wash fault zone, Nevada, USA
Author:
Abdelhaleem Shaimaa12ORCID, Taylor Wanda J.1, Reid Andrew1, Reed Nathan G.3
Affiliation:
1. 1Department of Geoscience, University of Nevada–Las Vegas, Las Vegas, Nevada 89119, USA 2. 2Geology Department, Cairo University, Giza, Egypt 3. 3Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA
Abstract
Abstract
The interactions among dip-slip and strike-slip faults are critical features in rift segmentation, including strain and slip transfer between faults of different rift segments. Here, we focused on the influence of factors such as fault and fracture geometries, kinematics, and local stress fields on the interaction and linkage of synchronous strike-slip and normal faults. Well-exposed faults along the tectonically active boundary between the central and northern Basin and Range provided for both reliable geometric data and consideration of rift segment development. We documented relative ages and distributions of Quaternary deposits, scarps, and geometries of three ~20–65-km-long Quaternary faults: the N-striking, normal Coyote Spring fault; the ENE-striking, left-lateral Kane Springs Wash fault; and the N-striking, normal Wildcat Wash fault.
The normal faults bend to accommodate slip-type differences across linkage zones, with the strike-slip fault and local processes influencing interactions. Influenced by the local stress field of the Kane Springs Wash fault, the Coyote Spring fault bends SE as it approaches and links to the Kane Springs Wash fault. Influenced by the off-fault or process-zone fractures of the Kane Springs Wash fault, the Wildcat Wash fault bends NE and links with the Kane Springs Wash fault. The Kane Springs Wash fault continues beyond the normal fault terminations, suggesting slip transfer between them via the Kane Springs Wash fault. These relations and the ages of offset units suggest that activity on the faults was approximately synchronous despite slip-type differences. Consequently, in slip transfer, the local strike-slip stress environment and off-fault fractures influenced the geometry of the normal fault terminations; the strike-slip fault formed a boundary to dip-slip fault propagation; and this boundary facilitated kinematic and geodetic segmentation, forming a Basin and Range rift segment boundary.
Publisher
Geological Society of America
Reference154 articles.
1. Abdelhaleem, S., and Taylor, W.J., 2015, Kinematics and timing of deformation of Nellis Dunes Recreational Area, Nevada: American Association of Petroleum Geologists Search and Discovery Article 51120 (adapted from oral presentation given at Pacific Section American Association of Petroleum Geologists, Society of Exploration Geophysicists, and Society for Sedimentary Geology [SEPM] Joint Technical Conference, Oxnard, California, 3–5 May 2015), https://www.searchanddiscovery.com/pdfz/documents/2015/51120abdelhaleem/ndx_abdelhaleem.pdf.html. 2. The 1997 Umbria-Marche, Italy, earthquake sequence: A first look at the main shocks and aftershocks;Amato;Geophysical Research Letters,1998 3. Overlapping faults, intrabasin highs, and the growth of normal faults;Anders;The Journal of Geology,1994 4. Microfracturing, paleostress and the growth of faults;Anders;Journal of Structural Geology,1994 5. Anderson, R.E.
, compiler, 1998, Fault Number 1062, Wildcat Wash Fault: Quaternary Fault and Fold Database of the United States, https://earthquake.usgs.gov/hazards/qfaults (last accessed 17 November 2023).
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