Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys

doi:10.1080/00206814.2023.2233016

	Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys
	Xia, Ying 1; Sui, Qinglin2,3 ; He, Yongkang 4; Ji, Wenhua 4; Chen, Denghui 4; Zhao, Xiaojian 4; Zhao, Min 4; Gao, Xiaofeng 4; Wang, Kun3 ; Zhang, Lipeng 3; He, Haiyang 2; Wang, Jinfeng2 ; Chen, Yue 1
	2023-07-08
发表期刊	INTERNATIONAL GEOLOGY REVIEW
ISSN	0020-6814
页码	19
通讯作者	Sui, Qinglin(qlinsui@163.com)
摘要	The widespread occurrence of Carboniferous Wuluate Formation volcanic rocks in the West Kunlun is closely related to the evolution of the Paleo-Tethys but has received little attention. In this study, we conducted detailed fieldwork on the Wuluate Formation in West Kunlun and performed zircon U-Pb dating, whole-rock major and trace element analysis, whole-rock Sr-Nd isotope analysis, and in situ zircon Hf isotope analyses. The Wuluate Formation is characterized by a bimodal volcanic suite. Zircon U-Pb dating indicates that the rhyolites erupted at ca. 348-353 Ma, which is coeval with the zircon U-Pb dating result of 354 Ma for the basalt. The basalts show a tholeiitic magmatic evolution trend with flattened REE patterns and depleted whole-rock Sr-Nd and zircon Hf isotopes, indicating geochemical affinity to back-arc basin basalt (BABB). Trace element modelling results indicate that the primitive basaltic compositions fit well with the products of the DMM + sediments + H2O source under melting conditions of asthenospheric temperature and thin lithosphere thickness, and the REE modelling results show that the basalts underwent 40% to 95% crystallographic differentiation of olivine, monazite, hornblende, plagioclase, and magnetite. The silicic rocks are calcic to calcic-alkaline and meta/peraluminous. They exhibit flattened REE patterns and slightly enriched zircon Hf isotopes, which could originate from Precambrian metaigneous sources of West Kunlun. The Kungai bimodal suite is likely to have formed in a back-arc setting corresponding to the northward subduction of Paleo-Tethys. The subduction of Paleo-Tethys had already occurred, and a back-arc basin had developed before the Early Carboniferous.
关键词	bimodal suites Zircon U-Pb age back-arc West Kunlun Paleo-Tethys >
DOI	10.1080/00206814.2023.2233016
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42003028] ; Research Foundation of Education Bureau of Hunan Province, China[22B0433] ; Provincial Key Ramp;D Program of Xinjiang Autonomous Region[2022A03010-2]
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:001020821700001
出版者	TAYLOR & FRANCIS INC
WOS关键词	POTASSIC MICROGRANULAR ENCLAVES ; CALC-ALKALINE DIFFERENTIATION ; TRACE-ELEMENT COMPOSITION ; NW CHINA IMPLICATIONS ; OROGENIC BELT ; TECTONIC EVOLUTION ; FRACTIONAL CRYSTALLIZATION ; ACCRETIONARY TECTONICS ; MARIANA ARC ; ORIGIN
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182419
专题	深海极端环境与生命过程研究中心
通讯作者	Sui, Qinglin
作者单位	1.Chengdu Univ Technol, Coll Earth Sci, Chengdu, Peoples R China 2.Univ South China, Sch Resource Environm & Safety Engn, Hengyang, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China 4.China Geol Survey, Xian Ctr Geol Survey, Ctr Orogen Belt Geol, Xian, Peoples R China
通讯作者单位	深海极端环境与生命过程研究中心
推荐引用方式 GB/T 7714	Xia, Ying,Sui, Qinglin,He, Yongkang,et al. Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys[J]. INTERNATIONAL GEOLOGY REVIEW,2023:19.
APA	Xia, Ying.,Sui, Qinglin.,He, Yongkang.,Ji, Wenhua.,Chen, Denghui.,...&Chen, Yue.(2023).Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys.INTERNATIONAL GEOLOGY REVIEW,19.
MLA	Xia, Ying,et al."Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys".INTERNATIONAL GEOLOGY REVIEW (2023):19.