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The Liuyuan complex in the Beishan, NW China: a Carboniferous-Permian ophiolitic fore-arc sliver in the southern Altaids

文献类型：期刊论文

作者Mao, Qigui1,2; Xiao, Wenjiao1; Windley, Brian F.3; Han, Chunming1; Qu, Junfeng1; Ao, Songjian1; Zhang, Ji'en1; Guo, Qianqian1
刊名GEOLOGICAL MAGAZINE
出版日期2012-05-01
卷号149期号:3页码:483-506
关键词Carboniferous-Permian Liuyuan complex accretionary orogenesis Beishan southern Altaids
ISSN号0016-7568
DOI10.1017/S0016756811000811
文献子类Article
英文摘要The tectonic history and time of closure of the Palaeo-Asian ocean of the Altaids are issues of lively current debate. To address these issues, this paper presents detailed geological, petrological and geochemical data of the Liuyuan complex (LC) in the Beishan region in NW China, located in the southernmost Altaids, in order to constrain its age, origin and tectonic setting. The LC mainly comprises massive basalts, pillow basalts, basaltic breccias, gabbros and ultramafic rocks together with cherts and tuffs. Most prominent are gabbros and large volumes of basaltic lavas. These mafic rocks have high TiO2 contents, flat rare earth element (REE) patterns and show high-field-strength elements (HFSEs) similar to those of mid-ocean ridge basalts (MORB). The mafic rocks exhibit positive epsilon(Nd(t)) (6.6-9.0) values, representing magmas derived from the mantle. But these basic rocks are also enriched in Th relative to REEs, and are systematically depleted in Nb-Ta-(Ti) relative to REEs. There is also a large range in initial Sr-87/Sr-86 (0.7037-0.7093). All these variables indicate that mantle-derived magma was contaminated by fluids and/or melts from a subducting lithospheric slab, and formed in a supra-subduction zone (SSZ) setting. A gabbro intruded in the complex was dated by LA-ICP-MS on 20 zircons that yielded a Pb-206-U-238 weighted average age of 286 +/- 2 Ma. Considering the fact that all these basalts are imbricated against Permian tuffaceous sediments and limestone, we propose that the LC formed as an ophiolite in a fore-arc in Carboniferous-Permian time. This indicates that the Palaeo-Asian ocean still existed at 286 +/- 2 Ma in early Permian time, and thus the time of closure of the Palaeo-Asian ocean was in or after the late Permian.
WOS关键词ASIAN OROGENIC BELT ; PALEOZOIC TECTONIC EVOLUTION ; A-TYPE GRANITES ; NORTHWEST CHINA ; GEOCHEMICAL CHARACTERISTICS ; CONTINENTAL GROWTH ; ISOTOPIC EVIDENCE ; EASTERN XINJIANG ; GANSU PROVINCE ; CRUSTAL GROWTH
WOS研究方向Geology
语种英语
WOS记录号WOS:000302369600008
出版者CAMBRIDGE UNIV PRESS
资助机构Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 40523003 ; 40523003 ; 40523003 ; 40523003 ; 40973036) ; 40973036) ; 40973036) ; 40973036) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 40523003 ; 40523003 ; 40523003 ; 40523003 ; 40973036) ; 40973036) ; 40973036) ; 40973036) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 40523003 ; 40523003 ; 40523003 ; 40523003 ; 40973036) ; 40973036) ; 40973036) ; 40973036) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese State 973 Project(2007CB411307) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese Academy of Sciences(KZCX2-YW-Q04-08) ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; Chinese State 305 Projects(2011BAB06B04-1 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; NSFC(40725009 ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 2011BAB06B04-3) ; 40523003 ; 40523003 ; 40523003 ; 40523003 ; 40973036) ; 40973036) ; 40973036) ; 40973036)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84098]  
专题中国科学院地质与地球物理研究所
通讯作者Xiao, Wenjiao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China
3.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
推荐引用方式
GB/T 7714		 Mao, Qigui,Xiao, Wenjiao,Windley, Brian F.,et al. The Liuyuan complex in the Beishan, NW China: a Carboniferous-Permian ophiolitic fore-arc sliver in the southern Altaids[J]. GEOLOGICAL MAGAZINE,2012,149(3):483-506.
APA Mao, Qigui.,Xiao, Wenjiao.,Windley, Brian F..,Han, Chunming.,Qu, Junfeng.,...&Guo, Qianqian.(2012).The Liuyuan complex in the Beishan, NW China: a Carboniferous-Permian ophiolitic fore-arc sliver in the southern Altaids.GEOLOGICAL MAGAZINE,149(3),483-506.
MLA Mao, Qigui,et al."The Liuyuan complex in the Beishan, NW China: a Carboniferous-Permian ophiolitic fore-arc sliver in the southern Altaids".GEOLOGICAL MAGAZINE 149.3(2012):483-506.

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