气候变化领域集成服务门户(CCPortal): Detrital zircon ages and provenance of Neogene foreland basin sediments of the Karnali River section, Western Nepal Himalaya

CCPortal

DOI	10.1016/j.jseaes.2017.02.003
	Detrital zircon ages and provenance of Neogene foreland basin sediments of the Karnali River section, Western Nepal Himalaya
	Baral, Upendra; Ding, Lin; Chamlagain, Deepak
通讯作者	Baral, U (通讯作者)
发表日期	2017
ISSN	1367-9120
EISSN	1878-5786
起始页码	98
结束页码	109
卷号	138
英文摘要	This paper deals with the possible provenance of the middle Miocene to early Pleistocene fluvial sediments of the Siwalik Group along with the Karnali River section (Western Nepal) and adds new insights into the formation and evolution of the Himalayan orogeny by means of detrital zircon U-Pb dating by LA-ICP-MS supplemented with sandstone petrography. The modal composition of the dated sandstone samples shows a 'recycled orogen' field in QFL diagram, indicating significant reworking and recycling of the detrital sediments during the mountain building process. The detrital zircon U-Pb ages from the Lower Siwalik cluster around similar to 490-600 Ma and similar to 750-1300 Ma with major peaks at 560 Ma, 927 Ma, and 983 Ma. The result shows that the Tethys Himalaya, Higher Himalaya and possibly the Lesser Himalaya were the predominant sources during the deposition of the Lower Siwalik Group. Contrarily, the detrital zircon U-Pb ages in the Middle Siwalik rocks contains clusters around similar to 299-727 Ma, similar to 750-1200 Ma, similar to 1650-1900 Ma with major peaks at 469 Ma and 905 Ma. However, the increased input of mid-Proterozoic detritus (similar to 1600 Ma) points to the possibility of denudation of the lower Lesser Himalaya following the deposition of the lower part of Middle Siwalik (i.e. since similar to 10 Ma). (C) 2017 Elsevier Ltd. All rights reserved.
关键词	MAGNETIC POLARITY STRATIGRAPHY SIWALIK GROUP SEDIMENTS FOLD-THRUST BELT TECTONIC EVOLUTION U-PB ISOTOPIC CONSTRAINTS RECENT EXHUMATION EASTERN NEPAL FISSION-TRACK LATE MIOCENE
英文关键词	Nepal Himalaya; Siwalik Group; Karnali Section; U-Pb geochronology; Provenance analysis
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000401376300009
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/258947
推荐引用方式 GB/T 7714	Baral, Upendra,Ding, Lin,Chamlagain, Deepak. Detrital zircon ages and provenance of Neogene foreland basin sediments of the Karnali River section, Western Nepal Himalaya[J]. 中国科学院青藏高原研究所,2017,138.
APA	Baral, Upendra,Ding, Lin,&Chamlagain, Deepak.(2017).Detrital zircon ages and provenance of Neogene foreland basin sediments of the Karnali River section, Western Nepal Himalaya.JOURNAL OF ASIAN EARTH SCIENCES,138.
MLA	Baral, Upendra,et al."Detrital zircon ages and provenance of Neogene foreland basin sediments of the Karnali River section, Western Nepal Himalaya".JOURNAL OF ASIAN EARTH SCIENCES 138(2017).