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学科主题: 地球科学::地质学
题名: Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis
作者: Baral, U (Baral, Upendra)1, 2, 3; Lin, D (Lin, Ding)1, 2; Chamlagain, D (Chamlagain, Deepak)4
通讯作者: Baral, U
刊名: INTERNATIONAL JOURNAL OF EARTH SCIENCES
发表日期: 2016
DOI: 10.1007/s00531-015-1198-7
卷: 105, 期:3, 页:921-939
收录类别: SCI
合作性质: 国际
文章类型: Article
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.
语种: 英语
WOS记录号: WOS:000372612100012
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7727
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Tribhuvan Univ, Dept Geol, Tri Chandra Multiple Campus, Kathmandu, Nepal

Recommended Citation:
Baral, U ,Lin, D ,Chamlagain, D . Detrital zircon U-Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2016,105(3):921-939.
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