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dc.contributor.authorMiller, Nathaniel C.  Concept link
dc.contributor.authorLizarralde, Daniel  Concept link
dc.date.accessioned2016-10-28T19:16:48Z
dc.date.available2017-02-14T09:54:26Z
dc.date.issued2016-08-14
dc.identifier.citationGeophysical Research Letters 43 (2016): 7982–7990en_US
dc.identifier.urihttps://hdl.handle.net/1912/8478
dc.descriptionAuthor Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 43 (2016): 7982–7990, doi:10.1002/2016GL070083.en_US
dc.description.abstractEffects of serpentine-filled fault zones on seismic wave propagation in the upper mantle at the outer rise of subduction zones are evaluated using acoustic wave propagation models. Modeled wave speeds depend on azimuth, with slowest speeds in the fault-normal direction. Propagation is fastest along faults, but, for fault widths on the order of the seismic wavelength, apparent wave speeds in this direction depend on frequency. For the 5–12 Hz Pn arrivals used in tomographic studies, joint-parallel wavefronts are slowed by joints. This delay can account for the slowing seen in tomographic images of the outer rise upper mantle. At the Middle America Trench, confining serpentine to fault zones, as opposed to a uniform distribution, reduces estimates of bulk upper mantle hydration from ~3.5 wt % to as low as 0.33 wt % H2O.en_US
dc.description.sponsorshipNSF Grant Number: OCE-0841063en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2016GL070083
dc.subjectOuter rise faultingen_US
dc.subjectSerpentinizationen_US
dc.subjectSeismic anisotropyen_US
dc.titleFinite-frequency wave propagation through outer rise fault zones and seismic measurements of upper mantle hydrationen_US
dc.typeArticleen_US
dc.description.embargo2017-02-14en_US
dc.identifier.doi10.1002/2016GL070083


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