Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model

Due to the limited resolution at depth of geodetic and other geophysical data, the geometry and the loading rate of the ramp‐décollement faults below the metropolitan Los Angeles are poorly understood. Here we complement these data by assuming conservation of motion across the Big Bend of the San An...

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Main Authors: Daout, S., Peltzer, G., Doin, M.-P., Liu, Z., Jolivet, R., Barbot, Sylvain
Other Authors: Earth Observatory of Singapore
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/87828
http://hdl.handle.net/10220/46833
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-878282020-09-26T21:27:33Z Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model Daout, S. Peltzer, G. Doin, M.-P. Liu, Z. Jolivet, R. Barbot, Sylvain Earth Observatory of Singapore Fault Geometry Bayesian Approach DRNTU::Social sciences::Geography Due to the limited resolution at depth of geodetic and other geophysical data, the geometry and the loading rate of the ramp‐décollement faults below the metropolitan Los Angeles are poorly understood. Here we complement these data by assuming conservation of motion across the Big Bend of the San Andreas Fault. Using a Bayesian approach, we constrain the geometry of the ramp‐décollement system from the Mojave block to Los Angeles and propose a partitioning of the convergence with 25.5 ± 0.5 mm/yr and 3.1 ± 0.6 mm/yr of strike‐slip motion along the San Andreas Fault and the Whittier Fault, with 2.7 ± 0.9 mm/yr and 2.5 ± 1.0 mm/yr of updip movement along the Sierra Madre and the Puente Hills thrusts. Incorporating conservation of motion in geodetic models of strain accumulation reduces the number of free parameters and constitutes a useful methodology to estimate the tectonic loading and seismic potential of buried fault networks. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2018-12-05T07:58:56Z 2019-12-06T16:50:18Z 2018-12-05T07:58:56Z 2019-12-06T16:50:18Z 2016 Journal Article Daout, S., Barbot, S., Peltzer, G., Doin, M.-P., Liu, Z., & Jolivet, R. (2016). Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model. Geophysical Research Letters, 43(21), 11192-11201. doi:10.1002/2016GL071061 0094-8276 https://hdl.handle.net/10356/87828 http://hdl.handle.net/10220/46833 10.1002/2016GL071061 en Geophysical Research Letters © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Fault Geometry
Bayesian Approach
DRNTU::Social sciences::Geography
spellingShingle Fault Geometry
Bayesian Approach
DRNTU::Social sciences::Geography
Daout, S.
Peltzer, G.
Doin, M.-P.
Liu, Z.
Jolivet, R.
Barbot, Sylvain
Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
description Due to the limited resolution at depth of geodetic and other geophysical data, the geometry and the loading rate of the ramp‐décollement faults below the metropolitan Los Angeles are poorly understood. Here we complement these data by assuming conservation of motion across the Big Bend of the San Andreas Fault. Using a Bayesian approach, we constrain the geometry of the ramp‐décollement system from the Mojave block to Los Angeles and propose a partitioning of the convergence with 25.5 ± 0.5 mm/yr and 3.1 ± 0.6 mm/yr of strike‐slip motion along the San Andreas Fault and the Whittier Fault, with 2.7 ± 0.9 mm/yr and 2.5 ± 1.0 mm/yr of updip movement along the Sierra Madre and the Puente Hills thrusts. Incorporating conservation of motion in geodetic models of strain accumulation reduces the number of free parameters and constitutes a useful methodology to estimate the tectonic loading and seismic potential of buried fault networks.
author2 Earth Observatory of Singapore
author_facet Earth Observatory of Singapore
Daout, S.
Peltzer, G.
Doin, M.-P.
Liu, Z.
Jolivet, R.
Barbot, Sylvain
format Article
author Daout, S.
Peltzer, G.
Doin, M.-P.
Liu, Z.
Jolivet, R.
Barbot, Sylvain
author_sort Daout, S.
title Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
title_short Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
title_full Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
title_fullStr Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
title_full_unstemmed Constraining the kinematics of metropolitan Los Angeles faults with a slip‐partitioning model
title_sort constraining the kinematics of metropolitan los angeles faults with a slip‐partitioning model
publishDate 2018
url https://hdl.handle.net/10356/87828
http://hdl.handle.net/10220/46833
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