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dc.contributor.author
Schulte-Pelkum, Vera
dc.contributor.author
Becker, Thorsten W.
dc.contributor.author
Behr, Whitney M.
dc.contributor.author
Miller, Meghan S.
dc.date.accessioned
2021-11-30T12:20:55Z
dc.date.available
2021-11-29T11:34:45Z
dc.date.available
2021-11-30T12:20:55Z
dc.date.issued
2021-11
dc.identifier.issn
1525-2027
dc.identifier.other
10.1029/2021gc010099
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/517497
dc.identifier.doi
10.3929/ethz-b-000517497
dc.description.abstract
The style of convective force transmission to plates and strain-localization within and underneath plate boundaries remain debated. To address some of the related issues, we analyze a range of deformation indicators in southern California from the surface to the asthenosphere. Present-day surface strain rates can be inferred from geodesy. At seismogenic crustal depths, stress can be inferred from focal mechanisms and splitting of shear waves from local earthquakes via crack-dependent seismic velocities. At greater depths, constraints on rock fabrics are obtained from receiver function anisotropy, Pn and P tomography, surface wave tomography, and splitting of SKS and other teleseismic core phases. We construct a synthesis of deformation-related observations focusing on quantitative comparisons of deformation style. We find consistency with roughly N-S compression and E-W extension near the surface and in the asthenospheric mantle. However, all lithospheric anisotropy indicators show deviations from this pattern. Pn fast axes and dipping foliations from receiver functions are fault-parallel with no localization to fault traces and match post-Farallon block rotations in the Western Transverse Ranges. Local shear wave splitting orientations deviate from the stress orientations inferred from focal mechanisms in significant portions of the area. We interpret these observations as an indication that lithospheric fabric, developed during Farallon subduction and subsequent extension, has not been completely reset by present-day transform motion and may influence the current deformation behavior. This provides a new perspective on the timescales of deformation memory and lithosphere-asthenosphere interactions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Tectonic Inheritance During Plate Boundary Evolution in Southern California Constrained From Seismic Anisotropy
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-10-30
ethz.journal.title
Geochemistry, Geophysics, Geosystems
ethz.journal.volume
22
en_US
ethz.journal.issue
11
en_US
ethz.journal.abbreviated
Geochem. Geophys. Geosyst.
ethz.pages.start
e2021GC010099
en_US
ethz.size
22 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::09636 - Behr, Whitney / Behr, Whitney
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::09636 - Behr, Whitney / Behr, Whitney
en_US
ethz.date.deposited
2021-11-29T11:34:55Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-11-30T12:21:02Z
ethz.rosetta.lastUpdated
2022-03-29T16:20:36Z
ethz.rosetta.versionExported
true
ethz.COinS
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