Tectonic melange records the Silurian-Devonian subduction-metamorphic process of the southern Dunhuang terrane, southernmost Central Asian Orogenic Belt

doi:10.1130/G38834.1

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	Tectonic melange records the Silurian-Devonian subduction-metamorphic process of the southern Dunhuang terrane, southernmost Central Asian Orogenic Belt
	Wang, Hao Y. C.1,2; Chen, Hong-Xu 1; Zhang, Qian W. L.1; Shi, Meng-Yan 1; Yan, Quan-Ren 1,2; Hou, Quan-Lin 1,2; Zhang, Qing 3; Kusky, Timothy 4,5; Wu, Chun-Ming 1,2
刊名	GEOLOGY
	2017-05-01
卷号	45 期号:5 页码:427-430
ISSN号	0091-7613
DOI	10.1130/G38834.1
文献子类	Article
英文摘要	The Hongliuxia tectonic melange of the southern Dunhuang terrane, northwestern China, southernmost Central Asian Orogenic Belt (CAOB), consists of eclogite, mafic granulite, and amphibolite as puddingstones within a matrix of metapelitic gneiss and marble; these rocks are interpreted to be part of an ancient subduction zone setting. Secondary ion mass spectrometry U-Pb dating of metamorphic zircons obtained from the puddingstones and matrix metapelite suggests that the metamorphism occurred at ca. 428-391 Ma. The metamorphic rocks all record similar clockwise metamorphic pressuretemperature- time (P-T-t) paths of the western Alpine type. However, remarkable differences between metamorphic peak P-T conditions ranging from 830 degrees C and 24.2 kbar for the eclogite puddingstone to 700 degrees C and 10.2 kbar for the metapelite matrix were found in the melange rocks. This indicates the mixing of rocks from significantly different depths to create a tectonic melange in a subduction channel, possibly juxtaposed during the uplift stage. These data suggest that the southernmost CAOB underwent subduction and subsequent exhumation caused by subduction of the Paleozoic Hongliuxia ocean during the middle Silurian to middle Devonian.
WOS关键词	HIGH-PRESSURE GRANULITES ; NORTH CHINA CRATON ; ACCRETIONARY ; EVOLUTION ; MARGINS ; HISTORY ; ZIRCON
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000404101300015
资助机构	National Natural Science Foundation of China(41225007 ; National Natural Science Foundation of China(41225007 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; 41372199) ; 41372199) ; National Natural Science Foundation of China(41225007 ; National Natural Science Foundation of China(41225007 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; 41372199) ; 41372199) ; National Natural Science Foundation of China(41225007 ; National Natural Science Foundation of China(41225007 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; 41372199) ; 41372199) ; National Natural Science Foundation of China(41225007 ; National Natural Science Foundation of China(41225007 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(KAI201605) ; 41372199) ; 41372199)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/50664]
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	Wu, Chun-Ming
作者单位	1.Univ Chinese Acad Sci, Coll Earth Sci, POB 4588, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, 11 South Minzudaxue Rd, Beijing 100081, Peoples R China 4.China Univ Geosci, Ctr Global Tecton, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 5.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hao Y. C.,Chen, Hong-Xu,Zhang, Qian W. L.,et al. Tectonic melange records the Silurian-Devonian subduction-metamorphic process of the southern Dunhuang terrane, southernmost Central Asian Orogenic Belt[J]. GEOLOGY,2017,45(5):427-430.
APA	Wang, Hao Y. C..,Chen, Hong-Xu.,Zhang, Qian W. L..,Shi, Meng-Yan.,Yan, Quan-Ren.,...&Wu, Chun-Ming.(2017).Tectonic melange records the Silurian-Devonian subduction-metamorphic process of the southern Dunhuang terrane, southernmost Central Asian Orogenic Belt.GEOLOGY,45(5),427-430.
MLA	Wang, Hao Y. C.,et al."Tectonic melange records the Silurian-Devonian subduction-metamorphic process of the southern Dunhuang terrane, southernmost Central Asian Orogenic Belt".GEOLOGY 45.5(2017):427-430.