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Detailed Reference Information |
Gan, W., Zhang, P., Shen, Z., Prescott, W.H. and Svarc, J.L. (2003). Initiation of deformation of the Eastern California Shear Zone: Constraints from Garlock fault geometry and GPS observations. Geophysical Research Letters 30: doi: 10.1029/2003GL017090. issn: 0094-8276. |
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We suggest a 2-stage deformation model for the Eastern California Shear Zone (ECSZ) to explain the geometry of the Garlock fault trace. We assume the Garlock fault was originally straight and then was gradually curved by right-lateral shear deformation across the ECSZ. In our 2-stage deformation model, the first stage involves uniform shear deformation across the eastern part of the shear zone, and the second stage involves uniform shear deformation across the entire shear zone. In addition to the current shape of the Garlock fault, our model incorporates constraints on contemporary deformation rates provided by GPS observations. We find that the best fitting age for initiation of shear in eastern part of the ECSZ is about 5.0 ¿ 0.4 Ma, and that deformation of the western part started about 1.6 Myr later. |
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Abstract |
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Keywords
Geodesy and Gravity, Crustal movements--interplate, Geodesy and Gravity, Space geodetic surveys, Mathematical Geophysics, Modeling, Tectonophysics, Plate boundary--general |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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