气候变化领域集成服务门户(CCPortal): Provenance of Jurassic-Cretaceous Tethyan Himalayan sequences in the Thakkhola Section- Nepal, inferring pre-collisional tectonics of the central Himalaya

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DOI	10.1016/j.jseaes.2020.104288
	Provenance of Jurassic-Cretaceous Tethyan Himalayan sequences in the Thakkhola Section- Nepal, inferring pre-collisional tectonics of the central Himalaya
	Neupane, Bhupati; Zhao, Junmeng; Allen, Charlotte M.; Ju, Yiwen; Baral, Upendra; Gyawali, Babu Ram
通讯作者	Neupane, B ; Zhao, JM (通讯作者)
发表日期	2020
ISSN	1367-9120
EISSN	1878-5786
卷号	192
英文摘要	The Jurassic-Cretaceous (Upper Tethyan) flysch well exposed in the Thakkhola Section, Nepal, was deposited prior to the continent-continent collision between the Indian and Eurasian plates. This Tethyan Himalayan Sequence (THS) has preserved the extreme northern passive margin of the Indian plate with its direct deposition onto the eroded Precambrian rocks in the lowest part of this relatively continuous section. The clastic rocks of the THS, as they are useful to constrain the paleogeography and paleotectonics of the Himalayan Orogen. In this study, we report the petrography, detrital zircon U-Pb isotopic ages, and zircon trace element data for sandstone samples from the Upper part of a Triassic stratigraphic section. The mineral modal composition data indicates that these quartz-rich units were derived from recycled orogen. This is supported that the youngest zircons analyzed can be dated to similar to 400 Ma that predates the depositional age by hundreds of millions of years. A total of 85% of the zircon ages are < 1,500 Ma and the oldest dated zircon is similar to 3300 Ma. What these sections share in terms of detrital zircon signals are peaks at pre-Rodinian, a Grenvillian, a Gondwanan, and nothing either younger, except for the weak presence or total absence, of a Cretaceous zircon age signal. More importantly, these results drive us to surmise that either sedimentary or crystalline, in the Indian plate that has provided the unusual mix of 475-675 Ma and 825-950 Ma age peaks, with the latter associated with an Eastern African super deltaic fan.
关键词	U-PB GEOCHRONOLOGY SOUTHERN TIBET TRACE-ELEMENT ZIRCON GEOCHRONOLOGY SEDIMENTARY HISTORY EXHUMATION HISTORY LHASA TERRANE EVOLUTION GONDWANA LESSER
英文关键词	Upper Tethyan units; Paleogeography; Passive margin; Provenance; U-Pb dating
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000521111600013
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259982
推荐引用方式 GB/T 7714	Neupane, Bhupati,Zhao, Junmeng,Allen, Charlotte M.,et al. Provenance of Jurassic-Cretaceous Tethyan Himalayan sequences in the Thakkhola Section- Nepal, inferring pre-collisional tectonics of the central Himalaya[J]. 中国科学院青藏高原研究所,2020,192.
APA	Neupane, Bhupati,Zhao, Junmeng,Allen, Charlotte M.,Ju, Yiwen,Baral, Upendra,&Gyawali, Babu Ram.(2020).Provenance of Jurassic-Cretaceous Tethyan Himalayan sequences in the Thakkhola Section- Nepal, inferring pre-collisional tectonics of the central Himalaya.JOURNAL OF ASIAN EARTH SCIENCES,192.
MLA	Neupane, Bhupati,et al."Provenance of Jurassic-Cretaceous Tethyan Himalayan sequences in the Thakkhola Section- Nepal, inferring pre-collisional tectonics of the central Himalaya".JOURNAL OF ASIAN EARTH SCIENCES 192(2020).