Preservation of a Paleoproterozoic rifted margin in the Himalaya:Insight from the Ulleri-Phaplu-Melung orthogneiss

查看全文 作　　者：[1]K.Larson;[2]S.Piercey;[3]J.Cottle

机构地区：[1]Earth, Environmental and Geographical Sciences, IKBSAS, University of British Columbia;[2]Department of Earth Sciences, Memorial University of Newfoundland;[3]Department of Earth Science, University of California,Santa Barbara

出　　处：《Geoscience Frontiers》索引2019年第10卷第3期,共11页

基　　金：supported by NSERC Discovery Grants to K. Larson and S. Piercey and NSF Grant No. 1119380 to J. Cottle 摘　　要：Orthogneiss within the Paleoproterozoic strata of Lesser Himalayan sequence across the Himalaya has been variably linked to development in a continental arc setting, Indian basement, or a continental rift.New whole rock and trace element geochemical data and U/Pb zircon geochronology indicate that the granitoid protoliths to these rocks were derived from upper crustal sources in the Paleoproterozoic and have within-plate, A-type affinities. This is consistent with their generation in a rifted margin and is compatible with paleogeographic reconstructions that indicate an open boundary for present-day northern India in the Paleoproterozoic. 关键词：HIMALAYA Geochemistry PALEOGEOGRAPHY RIFTING GEOCHRONOLOGY

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Preservation of a Paleoproterozoic rifted margin in the Himalaya:Insight from the Ulleri-Phaplu-Melung orthogneiss

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