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dc.contributor.authorShen, Weisen  Concept link
dc.contributor.authorWiens, Douglas A.  Concept link
dc.contributor.authorAnandakrishnan, Sridhar  Concept link
dc.contributor.authorAster, Richard C.  Concept link
dc.contributor.authorGerstoft, Peter  Concept link
dc.contributor.authorBromirski, Peter D.  Concept link
dc.contributor.authorHansen, Samantha E.  Concept link
dc.contributor.authorDalziel, Ian W. D.  Concept link
dc.contributor.authorHeeszel, David S.  Concept link
dc.contributor.authorHuerta, Audrey D.  Concept link
dc.contributor.authorNyblade, Andrew A.  Concept link
dc.contributor.authorStephen, Ralph A.  Concept link
dc.contributor.authorWilson, Terry J.  Concept link
dc.contributor.authorWinberry, J. Paul  Concept link
dc.date.accessioned2018-11-09T16:11:58Z
dc.date.available2019-03-22T09:27:13Z
dc.date.issued2018-09-22
dc.identifier.citationJournal of Geophysical Research: Solid Earth 123 (2018): 7824-7849en_US
dc.identifier.urihttps://hdl.handle.net/1912/10702
dc.descriptionAuthor Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 123 (2018): 7824-7849, doi:10.1029/2017JB015346.en_US
dc.description.abstractWe construct a new seismic model for central and West Antarctica by jointly inverting Rayleigh wave phase and group velocities along with P wave receiver functions. Ambient noise tomography exploiting data from more than 200 seismic stations deployed over the past 18 years is used to construct Rayleigh wave phase and group velocity dispersion maps. Comparison between the ambient noise phase velocity maps with those constructed using teleseismic earthquakes confirms the accuracy of both results. These maps, together with P receiver function waveforms, are used to construct a new 3‐D shear velocity (Vs) model for the crust and uppermost mantle using a Bayesian Monte Carlo algorithm. The new 3‐D seismic model shows the dichotomy of the tectonically active West Antarctica (WANT) and the stable and ancient East Antarctica (EANT). In WANT, the model exhibits a slow uppermost mantle along the Transantarctic Mountains (TAMs) front, interpreted as the thermal effect from Cenozoic rifting. Beneath the southern TAMs, the slow uppermost mantle extends horizontally beneath the traditionally recognized EANT, hypothesized to be associated with lithospheric delamination. Thin crust and lithosphere observed along the Amundsen Sea coast and extending into the interior suggest involvement of these areas in Cenozoic rifting. EANT, with its relatively thick and cold crust and lithosphere marked by high Vs, displays a slower Vs anomaly beneath the Gamburtsev Subglacial Mountains in the uppermost mantle, which we hypothesize may be the signature of a compositionally anomalous body, perhaps remnant from a continental collision.en_US
dc.description.sponsorshipNational Science Foundation Grant Numbers: PLR‐1142518, PLR‐1246712, PLR 1246151, PLR‐1246416, PLR‐1744883, PLR‐ 1744883en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1029/2017JB015346
dc.subjectSeismologyen_US
dc.subjectCrust and uppermost mantleen_US
dc.subjectAmbient noise tomographyen_US
dc.subjectAntarcticaen_US
dc.subjectTransantarctic Mountainsen_US
dc.subjectGamburtsev Mountainsen_US
dc.titleThe crust and upper mantle structure of central and West Antarctica from Bayesian inversion of Rayleigh Wave and receiver functionsen_US
dc.typeArticleen_US
dc.description.embargo2019-03-22en_US
dc.identifier.doi10.1029/2017JB015346


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