Preservation of a Paleoproterozoic rifted margin in the Himalaya:Insight from the Ulleri-Phaplu-Melung orthogneiss
Preservation of a Paleoproterozoic rifted margin in the Himalaya:Insight from the Ulleri-Phaplu-Melung orthogneiss作者机构:Earth Environmental and Geographical Sciences IKBSAS University of British Columbia Department of Earth Sciences Memorial University of Newfoundland Department of Earth Science University of CaliforniaSanta Barbara
出 版 物:《Geoscience Frontiers》 (地学前缘(英文版))
年 卷 期:2019年第10卷第3期
页 面:873-883页
核心收录:
学科分类:07[理学] 0708[理学-地球物理学] 0704[理学-天文学]
主 题:Himalaya Geochemistry Paleogeography Rifting Geochronology
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 *** 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.