Tectonic geomorphology of the San Andreas fault zone in the southern Indio Hills, Coachella Valley, California

Keller, Edward A.; Bonkowski, M. S.; Korsch, R. J.; Shlemon, Roy J.

doi:10.1130/0016-7606(1982)93<46:tgotsa>2.0.co;2

Cited by 97 publications

(86 citation statements)

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“…1). The predicted slip rates on other segments are close to the upper bounds of geological estimates (KELLER et al, 1982;WELDON and SIEH, 1985;HARDEN and MATTI, 1989;POWELL and WELDON, 1992). Using different viscosity and yield strengths affects the absolute values but not the general pattern of the predicted fault slip rates.…”

Section: Initiation Of the Sjfmentioning

confidence: 62%

Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling

Liu

2007

Pure appl. geophys.

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The San Andreas Fault (SAF) is the Pacific-North American plate boundary, yet in southern California a significant portion of the relative plate motion is accommodated by the San Jacinto Fault (SJF). Here we investigate the initiation of the SJF and its interaction with the SAF in a threedimensional visco-elasto-plastic finite-element model. The model results show that the restraining bend of the southern SAF causes strain localization along the SJF, thus may have contributed to its initiation. Slip on the SJF tends to reduce slip rate on the SAF and enhance deformation in the Eastern California Shear Zone. The initiation of the SJF and its interaction with the SAF reflect the evolving plate boundary zone as it continuously seeks the most efficient way to accommodate the relative plate motion.

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Section: Initiation Of the Sjfmentioning

confidence: 62%

Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling

Liu

2007

Pure appl. geophys.

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“…More relevant to our analysis are rates south of the Banning Pass. At Indio Sieh [1986] found a minimum rate of 30 mm/a for the 1000 -1700 AD time period, at the high end of the 10-35 mm/a interpreted at the nearby Biskra Palms site by Keller et al [1982]. Recently the estimate of Keller et al [1982] has been reevaluated at the Biskra Palms site by van der Woerd et al [2006] on the basis of revised alluvial fan displacement offsets and more accurate dating methods to give a SSAF rate of $16 mm/a, within the range of Keller et al [1982].…”

Section: Geologic Rate Estimatesmentioning

confidence: 99%

“…At Indio Sieh [1986] found a minimum rate of 30 mm/a for the 1000 -1700 AD time period, at the high end of the 10-35 mm/a interpreted at the nearby Biskra Palms site by Keller et al [1982]. Recently the estimate of Keller et al [1982] has been reevaluated at the Biskra Palms site by van der Woerd et al [2006] on the basis of revised alluvial fan displacement offsets and more accurate dating methods to give a SSAF rate of $16 mm/a, within the range of Keller et al [1982]. This suggests that the current best estimate of slip on the SSAF is $16 mm/a, with even slower rates near Indio and the Salton Sea farther south reflecting shallower creep [Sieh and Williams, 1990;Shifflett et al, 2002].…”

Section: Geologic Rate Estimatesmentioning

confidence: 99%

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

Lundgren¹,

Hetland²,

Liu³

et al. 2009

J. Geophys. Res.

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[1] We use ground geodetic and interferometric synthetic aperture radar satellite observations across the southern San Andreas (SAF)-San Jacinto (SJF) fault systems to constrain their slip rates and the viscosity structure of the lower crust and upper mantle on the basis of periodic earthquake cycle, Maxwell viscoelastic, finite element models. Key questions for this system are the SAF and SJF slip rates, the slip partitioning between the two main branches of the SJF, and the dip of the SAF. The best-fitting models generally have a high-viscosity lower crust (h = 10 21 Pa s) overlying a lower-viscosity upper mantle (h = 10 19 Pa s). We find considerable trade-offs between the relative time into the current earthquake cycle of the San Jacinto fault and the upper mantle viscosity. With reasonable assumptions for the relative time in the earthquake cycle, the partition of slip is fairly robust at around 24-26 mm/a for the San Jacinto fault system and 16-18 mm/a for the San Andreas fault. Models for two subprofiles across the SAF-SJF systems suggest that slip may transfer from the western (Coyote Creek) branch to the eastern (Clark-Superstition hills) branch of the SJF from NW to SE. Across the entire system our best-fitting model gives slip rates of 2 ± 3, 12 ± 9, 12 ± 9, and 17 ± 3 mm/a for the Elsinore, Coyote Creek, Clark, and San Andreas faults, respectively, where the large uncertainties in the slip rates for the SJF branches reflect the large uncertainty in the slip rate partitioning within the SJF system.Citation: Lundgren, P., E. A. Hetland, Z. Liu, and E. J. Fielding (2009), Southern San Andreas-San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations,

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“…We applied methodologies used in similar tectonically active regions (e.g. California, New Zealand), where the recognition of lateral displacements of streams and alluvial terraces, resulting from active strike-slip faulting (Wallace, 1968;Huang, 1993;Jackson et al, 1996;Burbank and Anderson, 2001), were combined with age controls (e.g., Matsuda, 1967;Keller et al, 1982;Sieh and Jahns, 1984;Van Dissen and Berryman, 1996).…”

Section: Introductionmentioning

confidence: 99%

Preliminary slip rate estimates for the Düzce segment of the North Anatolian Fault Zone from offset geomorphic markers

2008

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Tectonic geomorphology of the San Andreas fault zone in the southern Indio Hills, Coachella Valley, California

Cited by 97 publications

References 0 publications

Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling

Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling

Southern San Andreas‐San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations

Preliminary slip rate estimates for the Düzce segment of the North Anatolian Fault Zone from offset geomorphic markers

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