气候变化领域集成服务门户(CCPortal): Provenance of Late Cretaceous accretionary complex within the Yarlung-Zangpo suture zone, Bainang, southern Tibet: Implications for the subduction-accretion of the Neo-Tethyan ocean

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DOI	10.1016/j.gr.2022.01.004
	Provenance of Late Cretaceous accretionary complex within the Yarlung-Zangpo suture zone, Bainang, southern Tibet: Implications for the subduction-accretion of the Neo-Tethyan ocean
	Guo, Xu-Dong; Ding, Lin; Laskowski, Andrew K.; Wang, Hou-Qi; Baral, Upendra; Zeng, Deng; Ding, Xiang-Li; Yue, Ya-Hui; Xie, Jing; Cai, Fu-Long
通讯作者	Cai, FL (通讯作者)
发表日期	2022
ISSN	1342-937X
EISSN	1878-0571
起始页码	78
结束页码	91
卷号	106
英文摘要	Accretionary complexes offer important source of information for studying the subduction history and source-to-sink system and neighboring terranes. In this study, we conducted field mapping, detrital zircon U-Pb age and trace element analyses, and electronic microprobe composition analysis of detrital Crspinel in sandstones from the Cretaceous Bainang accretionary complex in the central part of the Yarlung-Zangpo suture zone (YZSZ). The Bainang accretionary complex is located in a structural window that is mainly composed of Xigaze ophiolite, Late Triassic-Early Cretaceous radiolarite chert with a Late Cretaceous hemipelagic siliceous shale matrix, and Late Cretaceous sandstone. The obtained detrital zircon geochronological dataset confirms two spectra. Detrital zircons from the Canggasaba and Lianxiang sections are dominated by Precambrian grains with subordinate numbers of Mesozoic grains clustering at 243-178, 164-117, and 109-91 Ma, consistent with the melange and trench-fill Rongmawa Formation, and all the trace elements of the Mesozoic grains match continental arc affinity. Provenance analysis suggests that detritus in these sections was mainly derived from the eastern part of the Gangdese arc and the central-northern Lhasa terrane. These results confirm the existence of the ancestral Lhasa River that transports sediments from the eastern Lhasa terrane to the subduction zone and further westward along the east-west axial system parallel to the trench. Conversely, the Qiajiu section is mainly dominated by Mesozoic detrital zircon grains, representing submarine fan deposits that were sourced from the adjacent Gangdese arc and transported through a local north-south-flowing river system. Detrital Cr-spinel compositions and detrital zircon trace elements from the Qiajiu section also revealed the contribution of ophiolites. Considering the abundance of Eurasia-affinity detrital zircons, this study supports the single subduction model that was developed along the southern margin of the Lhasa terrane. (c) 2022 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词	XIGAZE FORE-ARC JURASSIC VOLCANIC-ROCKS ZIRCON U-PB LHASA TERRANE IMPLICATIONS INDIA-ASIA COLLISION SLAB ROLL-BACK NEO-TETHYS GANGDESE BATHOLITH YEBA FORMATION TRACE-ELEMENT
英文关键词	Yarlung-Zangpo suture zone; Accretionary complex; Detrital zircon U-Pb; Neo-Tethyan subduction
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000752729900006
来源期刊	GONDWANA RESEARCH
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/260723
推荐引用方式 GB/T 7714	Guo, Xu-Dong,Ding, Lin,Laskowski, Andrew K.,et al. Provenance of Late Cretaceous accretionary complex within the Yarlung-Zangpo suture zone, Bainang, southern Tibet: Implications for the subduction-accretion of the Neo-Tethyan ocean[J]. 中国科学院青藏高原研究所,2022,106.
APA	Guo, Xu-Dong.,Ding, Lin.,Laskowski, Andrew K..,Wang, Hou-Qi.,Baral, Upendra.,...&Cai, Fu-Long.(2022).Provenance of Late Cretaceous accretionary complex within the Yarlung-Zangpo suture zone, Bainang, southern Tibet: Implications for the subduction-accretion of the Neo-Tethyan ocean.GONDWANA RESEARCH,106.
MLA	Guo, Xu-Dong,et al."Provenance of Late Cretaceous accretionary complex within the Yarlung-Zangpo suture zone, Bainang, southern Tibet: Implications for the subduction-accretion of the Neo-Tethyan ocean".GONDWANA RESEARCH 106(2022).