气候变化领域集成服务门户(CCPortal): Detrital zircon U-Pb ages, Hf isotopic constraints, and trace element analysis of Upper Cretaceous-Neogene sedimentary units in the Western Nepal Himalaya: Implications for provenance changes and India-Asia collision

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DOI	10.1002/gj.3163
	Detrital zircon U-Pb ages, Hf isotopic constraints, and trace element analysis of Upper Cretaceous-Neogene sedimentary units in the Western Nepal Himalaya: Implications for provenance changes and India-Asia collision
	Baral, Upendra; Lin, Ding; Chamlagain, Deepak; Qasim, Muhammad; Paudayal, Khum N.; Neupane, Bhupati
通讯作者	Baral, U (通讯作者)
发表日期	2019
ISSN	0072-1050
EISSN	1099-1034
起始页码	120
结束页码	132
卷号	54 期号:1
英文摘要	The present study integrates detrital zircon U-Pb-Hf isotopic analysis from 13 sandstone samples from an Upper Cretaceous-Miocene sedimentary sequence in Nepal Himalaya to determine their provenance. These sequences constrain a shifting of provenance from south to north. The U-Pb ages from Upper Cretaceous-Palaeocene strata (Amile Formation) mainly cluster between similar to 1,860 and 1,400 Ma with a peak at similar to 1,630 Ma and an absence of grains younger than the Palaeoproterozoic (1,400 Ma) age. The detritus yielded positive detrital zircon epsilon(Hf) (t) values (as high as +10). However, the detrital zircon U-Pb ages from Eocene-Miocene sequence cluster at similar to 500-650, similar to 700-900, similar to 1,600-1,850, and similar to 2,500 Ma, and in addition, they have both positive and negative epsilon(Hf) (t) values (+11 to -25). This finding further elucidates that the detritus in the Amile Formation was entirely sourced from India, which changed following the time of the Bhainskati Formation deposition, to a mixture of both Asian and Indian affinities (the Himalayan region). This change in source region marks the possible time of the India-Asia collision during this transition phase, that is, Late Palaeocene-Earliest Eocene.
关键词	FORELAND BASIN SEDIMENTS KARNALI RIVER SECTION FOLD-THRUST BELT TECTONIC EVOLUTION SOUTHERN TIBET EXHUMATION HISTORY TETHYS HIMALAYA NORTHERN INDIA NW INDIA GEOCHRONOLOGY
英文关键词	detrital U-Pb geochronology; India-Asia collision; Lu-Hf analysis; Nepal Himalaya
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000455038100008
来源期刊	GEOLOGICAL JOURNAL
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/259541
推荐引用方式 GB/T 7714	Baral, Upendra,Lin, Ding,Chamlagain, Deepak,et al. Detrital zircon U-Pb ages, Hf isotopic constraints, and trace element analysis of Upper Cretaceous-Neogene sedimentary units in the Western Nepal Himalaya: Implications for provenance changes and India-Asia collision[J]. 中国科学院青藏高原研究所,2019,54(1).
APA	Baral, Upendra,Lin, Ding,Chamlagain, Deepak,Qasim, Muhammad,Paudayal, Khum N.,&Neupane, Bhupati.(2019).Detrital zircon U-Pb ages, Hf isotopic constraints, and trace element analysis of Upper Cretaceous-Neogene sedimentary units in the Western Nepal Himalaya: Implications for provenance changes and India-Asia collision.GEOLOGICAL JOURNAL,54(1).
MLA	Baral, Upendra,et al."Detrital zircon U-Pb ages, Hf isotopic constraints, and trace element analysis of Upper Cretaceous-Neogene sedimentary units in the Western Nepal Himalaya: Implications for provenance changes and India-Asia collision".GEOLOGICAL JOURNAL 54.1(2019).