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dc.contributor.authorMann, Michael E.
dc.contributor.authorAbers, Geoffrey A.
dc.contributor.authorCrosbie, Kayla
dc.contributor.authorCreager, Kenneth
dc.contributor.authorUlberg, Carl
dc.contributor.authorMoran, Seth
dc.contributor.authorRondenay, Stéphane
dc.date.accessioned2020-07-03T08:59:50Z
dc.date.available2020-07-03T08:59:50Z
dc.date.issued2019
dc.identifier.citationMann ME, Abers GA, Crosbie, Creager, Ulberg, Moran, Rondenay S. Imaging Subduction Beneath Mount St. Helens: Implications for Slab Dehydration and Magma Transport. Geophysical Research Letters. 2019;46(6):3163-3171eng
dc.identifier.urihttp://hdl.handle.net/1956/23302
dc.description.abstractMount St. Helens (MSH) is anomalously 35–50 km trenchward of the main Cascade arc. To elucidate the source of this anomalous forearc volcanism, the teleseismic‐scattered wavefield is used to image beneath MSH with a dense broadband seismic array. Two‐dimensional migration shows the subducting Juan de Fuca crust to at least 80‐km depth, with its surface only 68 ± 2 km deep beneath MSH. Migration and three‐dimensional stacking reveal a clear upper‐plate Moho east of MSH that disappears west of it. This disappearance is a result of both hydration of the mantle wedge and a westward change in overlying crust. Migration images also show that the subducting plate continues without break along strike. Combined with low temperatures inferred for the mantle wedge, this geometry greatly limits possible source regions for mantle melts that contribute to MSH magmas and requires lateral migration over large distances.eng
dc.language.isoengeng
dc.publisherAGUeng
dc.titleImaging Subduction Beneath Mount St. Helens: Implications for Slab Dehydration and Magma Transporteng
dc.typeJournal articleeng
dc.date.updated2020-02-18T11:38:16Z
dc.rights.holderCopyright 2019. American Geophysical Union. All Rights Reserved.eng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
dc.identifier.cristinID1704775
dc.identifier.doi10.1029/2018GL081471eng
dc.source.issn0094-8276eng
dc.source.issn1944-8007eng
dc.relation.journalGeophysical Research Letters


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