DOI: 10.1007/s00531-015-1198-7
Scopus记录号: 2-s2.0-84929648991
论文题名: Detrital zircon U–Pb geochronology of the Siwalik Group of the Nepal Himalaya: implications for provenance analysis
作者: Baral U. ; Lin D. ; Chamlagain D.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期: 3 起始页码: 921
结束页码: 939
语种: 英语
英文关键词: Nepal Himalaya
; Provenance
; Siwalik Group
; U–Pb geochronology
Scopus关键词: basin evolution
; detrital deposit
; foreland basin
; geochronology
; provenance
; uranium-lead dating
; zircon
; Himalayas
; Nepal
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 ~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. © 2015, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929648991&doi=10.1007%2fs00531-015-1198-7&partnerID=40&md5=1b20eaafb9ed8e5b535dcfc1e3e7e022
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70171
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, and Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Department of Geology, Tri Chandra Multiple Campus, Tribhuvan University, 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,2016-01-01,105(3)