A new ophiolitic melange containing boninitic blocks in Alxa region: Implications for Permian subduction events in southern CAOB

doi:10.1016/j.gsf.2018.02.014

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	A new ophiolitic melange containing boninitic blocks in Alxa region: Implications for Permian subduction events in southern CAOB
	Zheng, Rongguo 1,2; Li, Jinyi 1; Xiao, Wenjiao 2,3,4,5; Wang, Lijia 1
刊名	GEOSCIENCE FRONTIERS
	2018-09-01
卷号	9 期号:5 页码:1355-1367
关键词	Alxa region CAOB Ophiolite LA-ICP MS U-Pb Oxygen isotope
ISSN号	1674-9871
DOI	10.1016/j.gsf.2018.02.014
英文摘要	The Alxa region, located in the southernmost part of Central Asian Orogenic Belt, is a key region for understanding the tectonic processes associated with the closure of the Paleo-Asian Ocean. Issues of late Paleozoic tectonic settings and tectonic unit divisions of the Alxa region still remain controversial. In this study, we report a new ophiolitic melange named the Tepai ophiolitic melange in the northern Alxa region, northwest of Alxa Youqi. The tectonic blocks in the Tepai ophiolitic melange are mainly composed of serpentinized peridotites, serpentinites, mylonitized gabbros, gabbros, basalts, and quartzites, with a matrix comprising highly deformed clastic rocks. A gabbro exhibits a zircon LA-ICP-MS U-Pb age of 278.4 +/- 3.3 Ma. Gabbros exhibit high MgO and compatible element contents, but extremely low TiO2, totally rare earth element and high field strength element contents. These rocks exhibit light rare earth element depleted patterns, and display enriched in large-ion lithophile elements and depleted in high field strength elements. Boninite-like geochemical data show that they were formed in a subduction-related environment, and derived from an extremely depleted mantle source infiltrated by subduction-derived fluids and/or melts. The Tepai ophiolitic melange exhibits similar zircon U-Pb-O isotopic compositions and whole-rock geochemical characteristics to those of the Quagan Qulu ophiolite. Therefore, we propose that the Tepai ophiolitic melange may have been the western continuation of the Quagan Qulu ophiolite. Our new finding proves the final closure of the Paleo-Asian Ocean might have taken place later than the early Permian. (C) 2018, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
资助项目	National Natural Science Foundation of China[41502214] ; National Natural Science Foundation of China[41230207] ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences[J1706] ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows[2015LH0049] ; China Postdoctoral Foundation[2016M590990] ; Chinese Academy of Sciences[XDB18020203] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SYS012]
WOS关键词	ASIAN OROGENIC BELT ; NORTH CHINA CRATON ; INNER-MONGOLIA ; U-PB ; TRACE-ELEMENT ; NW CHINA ; CONTINENTAL GROWTH ; ZIRCON STANDARDS ; OCEANIC-CRUST ; LANGSHAN AREA
WOS研究方向	Geology
语种	英语
出版者	CHINA UNIV GEOSCIENCES, BEIJING
WOS记录号	WOS:000442691400008
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; Outlay Research Fund of Institute of Geology, Chinese Academy of Geological Sciences ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; China Postdoctoral Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88126]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Xiao, Wenjiao
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Rongguo,Li, Jinyi,Xiao, Wenjiao,et al. A new ophiolitic melange containing boninitic blocks in Alxa region: Implications for Permian subduction events in southern CAOB[J]. GEOSCIENCE FRONTIERS,2018,9(5):1355-1367.
APA	Zheng, Rongguo,Li, Jinyi,Xiao, Wenjiao,&Wang, Lijia.(2018).A new ophiolitic melange containing boninitic blocks in Alxa region: Implications for Permian subduction events in southern CAOB.GEOSCIENCE FRONTIERS,9(5),1355-1367.
MLA	Zheng, Rongguo,et al."A new ophiolitic melange containing boninitic blocks in Alxa region: Implications for Permian subduction events in southern CAOB".GEOSCIENCE FRONTIERS 9.5(2018):1355-1367.