Seismic evidence for a cold serpentinized mantle wedge beneath Mount St Helens

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dc.citation.articleNumber13242en_US
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber7en_US
dc.contributor.authorHansen, S.M.en_US
dc.contributor.authorSchmandt, B.en_US
dc.contributor.authorLevander, A.en_US
dc.contributor.authorKiser, E.en_US
dc.contributor.authorVidale, J.E.en_US
dc.contributor.authorAbers, G.A.en_US
dc.contributor.authorCreager, K.C.en_US
dc.date.accessioned2016-11-22T15:16:07Zen_US
dc.date.available2016-11-22T15:16:07Zen_US
dc.date.issued2016en_US
dc.description.abstractMount St Helens is the most active volcano within the Cascade arc; however, its location is unusual because it lies 50 km west of the main axis of arc volcanism. Subduction zone thermal models indicate that the down-going slab is decoupled from the overriding mantle wedge beneath the forearc, resulting in a cold mantle wedge that is unlikely to generate melt. Consequently, the forearc location of Mount St Helens raises questions regarding the extent of the cold mantle wedge and the source region of melts that are responsible for volcanism. Here using, high-resolution active-source seismic data, we show that Mount St Helens sits atop a sharp lateral boundary in Moho reflectivity. Weak-to-absent PmP reflections to the west are attributed to serpentinite in the mantle-wedge, which requires a cold hydrated mantle wedge beneath Mount St Helens (<∼700 °C). These results suggest that the melt source region lies east towards Mount Adams.en_US
dc.identifier.citationHansen, S.M., Schmandt, B., Levander, A., et al.. "Seismic evidence for a cold serpentinized mantle wedge beneath Mount St Helens." <i>Nature Communications,</i> 7, (2016) Springer: http://dx.doi.org/10.1038/ncomms13242.en_US
dc.identifier.doihttp://dx.doi.org/10.1038/ncomms13242en_US
dc.identifier.urihttps://hdl.handle.net/1911/92719en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.ﾠen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleSeismic evidence for a cold serpentinized mantle wedge beneath Mount St Helensen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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