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Tectonic activity along the inner margin of the South Tibetan Detachment constrained by syntectonic leucogranite emplacement in Western Bhutan

Montomoli, C; Carosi, Rodolfo; Rubatto, Daniela; Visona, Dario; Iaccarino, Salvatore

Description

In Western Bhutan Himalayas leucogranite dykes emplaced in sub-vertical hybrid fractures that cut across the high-grade rocks of the upper Greater Himalayan Sequence just below to the South Tibetan Detachment. The granitic dykes dip to the North often showing a mylonitic deformation with a top-down to-the-N sense of shear. The high-angle fractures are interpreted to be related to the evolution of the South Tibetan Detachment toward a brittle regime of deformation. U-Pb monazite ages constrain...[Show more]

dc.contributor.authorMontomoli, C
dc.contributor.authorCarosi, Rodolfo
dc.contributor.authorRubatto, Daniela
dc.contributor.authorVisona, Dario
dc.contributor.authorIaccarino, Salvatore
dc.date.accessioned2021-09-22T06:33:02Z
dc.identifier.issn2038-1719
dc.identifier.urihttp://hdl.handle.net/1885/248338
dc.description.abstractIn Western Bhutan Himalayas leucogranite dykes emplaced in sub-vertical hybrid fractures that cut across the high-grade rocks of the upper Greater Himalayan Sequence just below to the South Tibetan Detachment. The granitic dykes dip to the North often showing a mylonitic deformation with a top-down to-the-N sense of shear. The high-angle fractures are interpreted to be related to the evolution of the South Tibetan Detachment toward a brittle regime of deformation. U-Pb monazite ages constrain the leucogranite emplacement at 13.9±06 Ma implying that brittle-ductile deformation of the South Tibetan Detachment was active at that time. NNE-SSW to nearly E-W trending large scale antiforms and synforms mapped in NW Bhutan affected the Greater Himalayan Sequence and South Tibetan Detachment only after 14 Ma.
dc.description.sponsorshipFinancial support was provided by project MIUR-PRIN 2010-2011 (Resp. R. Carosi) and by Pisa (Resp. C. Montomoli), Torino (Resp. R. Carosi) and Padova (Resp. D. Visonà) Universities.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherSocieta Geologica Italiana
dc.rights© Società Geologica Italiana, Roma 2016
dc.sourceItalian Journal of Geosciences
dc.subjectSouth Tibetan Detachment System
dc.subjectleucogranite
dc.subjectBhutan Himalaya
dc.subjectmonazite geochronology
dc.titleTectonic activity along the inner margin of the South Tibetan Detachment constrained by syntectonic leucogranite emplacement in Western Bhutan
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume136
dc.date.issued2017
local.identifier.absfor040313 - Tectonics
local.identifier.absfor040303 - Geochronology
local.identifier.ariespublicationu4027924xPUB531
local.publisher.urlhttps://www.socgeol.it/
local.type.statusPublished Version
local.contributor.affiliationMontomoli, C, Universita di Pisa
local.contributor.affiliationCarosi, Rodolfo, University of Torino
local.contributor.affiliationRubatto, Daniela, College of Science, ANU
local.contributor.affiliationVisona, Dario, University of Padova
local.contributor.affiliationIaccarino, Salvatore, Universita di Pisa
local.description.embargo2099-12-31
local.bibliographicCitation.issue1
local.identifier.doi10.3301/IJG.2015.26
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2020-11-23T11:13:15Z
local.identifier.scopusID2-s2.0-85011357104
local.identifier.thomsonID000394731400001
CollectionsANU Research Publications

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