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DOI	10.1007/s00531-015-1198-7
	Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis
	Baral, Upendra; Lin, Ding; Chamlagain, Deepak
通讯作者	Baral, U (通讯作者)
发表日期	2016
ISSN	1437-3254
EISSN	1437-3262
起始页码	921
结束页码	939
卷号	105 期号:3
英文摘要	This paper deals with the provenance analysis of the Neogene foreland basin sediments of the Siwalik Group in the Nepal Himalaya. This study adopts the techniques of the optical petrography and detrital zircon U-Pb ages from two river sections: the Koshi Nadi in eastern Nepal and the Surai Khola in western Nepal Himalaya. The optical petrography data and resulting QFL plot show a recycled orogeny field for the studied sandstone samples, indicating northern lithotectonic units; Tethys Himalaya, Higher Himalaya and Lesser Himalaya as the source of the foreland basin sediments. The detrital zircon geochronological data set has clearly revealed that the cluster ages are younger than similar to 1000 Ma; however, the older grains (> 1000 Ma) are significantly fewer. The obtained age spectrum is similar to the Tethys Himalaya and the upper Lesser Himalaya, but the lower Lesser Himalayan rocks were not distinct, which indicates that sediments in the Neogene foreland basin of the Nepal Himalaya were primarily sourced from the Tethys Himalaya and upper Lesser Himalaya. The minor subordinate scattered peaks that roughly correspond to the age of the Higher Himalaya and lower Lesser Himalaya may indicate that a lower proportion of the sediments might have a link with the Higher Himalaya and lower Lesser Himalaya. Therefore, the provenance of the Siwalik Group in the Nepal Himalaya might have witnessed a mixed type of provenance similar to the northwestern Himalaya.
关键词	MAGNETIC POLARITY STRATIGRAPHY FORELAND BASIN DEPOSITS SURAI-KHOLA-SIWALIKS MAIN CENTRAL THRUST TECTONIC EVOLUTION ISOTOPIC CONSTRAINTS SEDIMENTARY RECORD ANNAPURNA RANGE SOUTHERN TIBET FISSION-TRACK
英文关键词	U-Pb geochronology; Provenance; Siwalik Group; Nepal Himalaya
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000372612100012
来源期刊	INTERNATIONAL JOURNAL OF 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/258721
推荐引用方式 GB/T 7714	Baral, Upendra,Lin, Ding,Chamlagain, Deepak. Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis[J]. 中国科学院青藏高原研究所,2016,105(3).
APA	Baral, Upendra,Lin, Ding,&Chamlagain, Deepak.(2016).Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis.INTERNATIONAL JOURNAL OF EARTH SCIENCES,105(3).
MLA	Baral, Upendra,et al."Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis".INTERNATIONAL JOURNAL OF EARTH SCIENCES 105.3(2016).