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

doi:10.1080/00206814.2023.2233016

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	Carboniferous back-arc bimodal rocks in West Kunlun during northward subduction of the Paleo-Tethys
	Xia, Ying 3; Sui, Qinglin 1,2; He, Yongkang 4; Ji, Wenhua 4; Chen, Denghui 4; Zhao, Xiaojian 4; Zhao, Min 4; Gao, Xiaofeng 4; Wang, Kun 1; Zhang, Lipeng 1
刊名	INTERNATIONAL GEOLOGY REVIEW
	2023-07-08
页码	19
关键词	bimodal suites Zircon U-Pb age back-arc West Kunlun Paleo-Tethys >
ISSN号	0020-6814
DOI	10.1080/00206814.2023.2233016
通讯作者	Sui, Qinglin(qlinsui@163.com)
英文摘要	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.
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
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:001020821700001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/182418]
专题	海洋研究所_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.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China 2.Univ South China, Sch Resource Environm & Safety Engn, Hengyang, Peoples R China 3.Chengdu Univ Technol, Coll Earth Sci, Chengdu, Peoples R China 4.China Geol Survey, Xian Ctr Geol Survey, Ctr Orogen Belt Geol, Xian, Peoples R China
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.