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dc.contributor.authorChambers, Jennifer
dc.contributor.authorParrish, Randall
dc.contributor.authorArgles, Tom
dc.contributor.authorHarris, Nigel
dc.contributor.authorHorstwood, Matthew
dc.date.accessioned2011-09-10T23:05:01Z
dc.date.available2011-09-10T23:05:01Z
dc.date.issued2011-03-11
dc.identifier.citationChambers , J , Parrish , R , Argles , T , Harris , N & Horstwood , M 2011 , ' A short-duration pulse of ductile normal shear on the outer South Tibetan detachment in Bhutan : Alternating channel flow and critical taper mechanics of the eastern Himalaya ' , Tectonics , vol. 30 , pp. TC2005 . https://doi.org/10.1029/2010TC002784en
dc.identifier.issn0278-7407
dc.identifier.otherPURE: 7047018
dc.identifier.otherPURE UUID: 14ec337a-c208-45d7-a6f9-5f4862b4ce1a
dc.identifier.otherWOS: 000288334200001
dc.identifier.otherScopus: 79952757056
dc.identifier.urihttps://hdl.handle.net/10023/2002
dc.descriptionField work was supported by a NERC Research Studentship field grant.en
dc.description.abstractIn easternmost Bhutan the South Tibetan detachment (STD) is a ductile shear zone that juxtaposes the Radi (or Sakteng) klippe of the Tethyan Sedimentary Series from underlying high-grade Greater Himalayan rocks. In situ LA-ICPMS U-Th-Pb analysis of metamorphic monazite from the immediate footwall and hanging wall of the STD within the shear zone at the base of the klippe, constrains north vergent normal shear to between 25 and 20 Ma. Coeval thrusting on the Main Central Thrust during this time supports a phase of channel flow-viscous wedge model activity, lasting only similar to 3 Ma. Geochronologic data from the eastern Himalaya indicate alternating mechanisms for extrusion of the metamorphic core of the orogen from the Late Oligocene through to the Late Miocene, switching from channel flow-viscous wedge behavior to critical taper-frictional wedge behavior, each phase lasting approximately only 2 to 5 Ma. The tectonic evolution of the eastern Himalaya is comparable to central and western Himalayan tectonics during the Early Miocene, but during the Middle Miocene metamorphism and magmatism in the eastern Himalaya migrated toward the orogenic hinterland, a process not widely documented elsewhere in the Himalaya, thus highlighting the need for an orogenic model in three spatial dimensions. Citation: Chambers, J., R. Parrish, T. Argles, N. Harris, and M. Horstwood (2011), A short-duration pulse of ductile normal shear on the outer South Tibetan detachment in Bhutan: Alternating channel flow and critical taper mechanics of the eastern Himalaya, Tectonics, 30, TC2005, doi:10.1029/2010TC002784.
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofTectonicsen
dc.rightsCopyright (c)2011 by the American Geophysical Union. Deposited 6 months from publication by AGUen
dc.subjectPrograde metamorphic reactionsen
dc.subjectMain central thrusten
dc.subjectMC-ICP-MSen
dc.subjectU-PBen
dc.subjectContinental collisionen
dc.subjectLesser himalayaen
dc.subjectMonaziteen
dc.subjectEvolutionen
dc.subjectSequenceen
dc.subjectSystemen
dc.subjectQE Geologyen
dc.subject.lccQEen
dc.titleA short-duration pulse of ductile normal shear on the outer South Tibetan detachment in Bhutan : Alternating channel flow and critical taper mechanics of the eastern Himalayaen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. School of Geography and Geosciencesen
dc.identifier.doihttps://doi.org/10.1029/2010TC002784
dc.description.statusPeer revieweden
dc.date.embargoedUntil2011-09-11


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