Metamorphic patterns and SHRIMP zircon ages of medium-to-high grade rocks from the Tongbai orogen, central China implications for multiple accretion/collision processes prior to terminal continental collision

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	Metamorphic patterns and SHRIMP zircon ages of medium-to-high grade rocks from the Tongbai orogen, central China implications for multiple accretion/collision processes prior to terminal continental collision
	Liu, XC (Liu, X. C.)5; Jahn, BM (Jahn, B. -M.); Hu, J (Hu, J.); Li, SZ (Li, S. Z.); Liu, X (Liu, X.); Song, B (Song, B.)
刊名	JOURNAL OF METAMORPHIC GEOLOGY
	2011
卷号	29 期号:9 页码:979-1002
关键词	accretion/collision clockwise/anticlockwise P-T path metamorphic patterns Palaeozoic Qinling-Tongbai-Dabie-Sulu orogenic belt U-Pb dating
ISSN号	0263-4929
英文摘要	The Qinling-Tongbai-Dabie-Sulu orogenic belt comprises a Palaeozoic accretion-dominated system in the north and a Mesozoic collision-dominated system in the south. A combined petrological and geochronological study of the medium-to-high grade metamorphic rocks from the diverse Palaeozoic tectonic units in the Tongbai orogen was undertaken to help elucidate the origins of Triassic ultrahigh-pressure metamorphism and collision dynamics between the Sino-Korean and Yangtze cratons. Peak metamorphic conditions are 570-610 degrees C and 9.3-11.2 kbar for the lower unit of the Kuanping Group, 630-650 degrees C and 6.6-8.9 kbar for the upper unit of the Kuanping Group, 550-600 degrees C and 6.3-7.7 kbar for the Erlangping Group, 770-830 degrees C and 6.9-8.5 kbar for the Qinling Group and 660-720 degrees C and 9.1-11.5 kbar for the Guishan complex. Reaction textures and garnet compositions indicate clockwise P-T paths for the amphibolite facies rocks of the Kuanping Group and Guishan complex, and an anticlockwise P-T path for the granulite facies rocks of the Qinling Group. Sensitive high-resolution ion microprobe U-Pb zircon dating on metamorphic rocks and deformed granite/pegmatites revealed two major Palaeozoic tectonometamorphic events. (i) During the Silurian-Devonian (c. 440-400 Ma), the Qinling continental arc and Erlangping intra-oceanic arc collided with the Sino-Korean craton. The emplacement of the Huanggang diorite complex resulted in an inverted thermal gradient in the underlying Kuanping Group and subsequent thermal relaxation during the exhumation. Meanwhile, the oceanic subduction beneath the Qinling continental arc produced magmatic underplating and intrusion, leading to granulite facies metamorphism followed by a near-isobaric cooling path. (ii) During the Carboniferous (c. 340-310 Ma), the northward subduction of the Palaeo-Tethyan ocean generated a medium P/T Guishan complex in the hangingwall and a high P/T Xiongdian eclogite belt in the footwall. The Guishan complex and Xiongdian eclogite belt are therefore considered to be paired metamorphic belts. Subsequent separation of the paired belts is inferred to be related to the juxtaposition of the Carboniferous eclogites with the Triassic HP metamorphic complex during continental subduction and exhumation.
学科主题	变质岩岩石学
WOS关键词	EAST-CENTRAL CHINA ; ULTRAHIGH-PRESSURE METAMORPHISM ; WESTERN DABIE MOUNTAINS ; TEMPERATURE-TIME PATHS ; ZONE SOUTHERN ALPS ; U-PB GEOCHRONOLOGY ; HUWAN SHEAR ZONE ; TECTONIC EVOLUTION ; QINLING OROGEN ; THERMAL REGIMES
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000296462100004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39436]
专题	中国地质调查局
作者单位	1.[Liu, X. C. 2.Hu, J.] Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China [Liu, X. C. 3.Jahn, B. -M.] Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan [Jahn, B. -M.] Natl Taiwan Univ, Dept Geosci, Taipei 10699, Taiwan [Li, S. Z. 4.Liu, X.] Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China [Song, B.] Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 5.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Liu, XC ,Jahn, BM ,Hu, J ,et al. Metamorphic patterns and SHRIMP zircon ages of medium-to-high grade rocks from the Tongbai orogen, central China implications for multiple accretion/collision processes prior to terminal continental collision[J]. JOURNAL OF METAMORPHIC GEOLOGY,2011,29(9):979-1002.
APA	Liu, XC ,Jahn, BM ,Hu, J ,Li, SZ ,Liu, X ,&Song, B .(2011).Metamorphic patterns and SHRIMP zircon ages of medium-to-high grade rocks from the Tongbai orogen, central China implications for multiple accretion/collision processes prior to terminal continental collision.JOURNAL OF METAMORPHIC GEOLOGY,29(9),979-1002.
MLA	Liu, XC ,et al."Metamorphic patterns and SHRIMP zircon ages of medium-to-high grade rocks from the Tongbai orogen, central China implications for multiple accretion/collision processes prior to terminal continental collision".JOURNAL OF METAMORPHIC GEOLOGY 29.9(2011):979-1002.