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dc.contributor.authorFerré, ECen
dc.contributor.authorGébelin, Aen
dc.contributor.authorConder, JAen
dc.contributor.authorChristensen, Nen
dc.contributor.authorWood, JDen
dc.contributor.authorTeyssier, Cen
dc.date.accessioned2019-10-09T10:48:08Z
dc.date.available2019-10-09T10:48:08Z
dc.date.issued2014-03-16en
dc.identifier.issn0094-8276en
dc.identifier.urihttp://hdl.handle.net/10026.1/14975
dc.description.abstract

The Minnesota River Valley (MRV) subprovince is a well-exposed example of late Archean lithosphere. Its high-grade gneisses display a subhorizontal layering, most likely extending down to the crust-mantle boundary. The strong linear fabric of the gneisses results from high-temperature plastic flow during collage-related contraction. Seismic anisotropies measured up to 1 GPa in the laboratory, and seismic anisotropies calculated through forward-modeling indicate ΔVP ~5-6% and ΔVS ~3%. The MRV crust exhibits a strong macroscopic layering and foliation, and relatively strong seismic anisotropies at the hand specimen scale. Yet the horizontal attitude of these structures precludes any substantial contribution of the MRV crust to shear wave splitting for vertically propagating shear waves such as SKS. The origin of the regionally low seismic anisotropy must lie in the upper mantle. A horizontally layered mantle underneath the United States interior could provide an explanation for the observed low SWS. Key Points The Archean crust of the Minnesota River Valley is strongly anisotropic The horizontally layered crust of the MRV cannot split vertical shear waves The cause of low SWS in the MRV must be in the uppermost mantle ©2014. American Geophysical Union. All Rights Reserved.

en
dc.format.extent1514 - 1522en
dc.language.isoenen
dc.titleSeismic anisotropy of the Archean crust in the Minnesota River Valley, Superior Provinceen
dc.typeJournal Article
plymouth.issue5en
plymouth.volume41en
plymouth.publication-statusPublisheden
plymouth.journalGeophysical Research Lettersen
dc.identifier.doi10.1002/2013GL059116en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
dc.identifier.eissn1944-8007en
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1002/2013GL059116en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.typeJournal Article/Reviewen


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