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Triassic retrograded eclogites and Cretaceous gneissic granites in the Tongbai Complex, central China: Implications for the architecture of the HP/UHP Tongbai-Dabie-Sulu collision zone

文献类型：期刊论文

作者Liu, Xiaochun1,2; Jahn, Bor-ming2; Cui, Jianjun1; Li, Sanzhong3; Wu, Yuanbao4; Li, Xian-hua5
刊名LITHOS
出版日期2010-10-01
卷号119期号:3-4页码:211-237
关键词Eclogite Granite U-Pb dating Triassic Cretaceous Diachronous Tongbai-Dabie-Sulu
ISSN号0024-4937
DOI10.1016/j.lithos.2010.06.005
文献子类Article
英文摘要The Permo-Triassic Qinling-Tongbai-Dabie-Sulu collision zone between the Sino-Korean and Yangtze cratons hosts a number of terranes: some of them carry evidence for ultrahigh-pressure (UHP) metamorphism. Discovery of retrograded high-pressure (HP) eclogites in the Tongbai Complex, in the middle of the orogen, brings fresh information to correlate segments of the orogen and understand dynamics of the orogeny. The 20 km wide Tongbai Complex is underlying two HP eclogite bearing lithotectonic units (the northern and southern eclogite zones) in the Tongbaishan area. It consists of gneissic granites and subordinate metamorphic enclaves. Among them, retrograded eclogites carry garnet with a compositional profile indicating a three-stage metamorphic evolution, from epidote-amphibolite, through eclogite, to amphibolite facies conditions. A thermobarometric study yields estimates of 660-700 degrees C and 8.0-10.3 kbar for the amphibolite facies stage. U-Pb geochronology and trace element characterization of zircon produced two important results. First, the dominant gneissic granites are Early Cretaceous (ca. 140 Ma) and not Neoproterozoic as formerly reported. Second, metaigneous enclaves, i.e. retrograded eclogites, garnet amphibolites, and dioritic-trondhjemitic gneisses, formed between 933 and 742 Ma and were metamorphosed at 232-220 Ma. Metasedimentary enclaves contain detrital zircons yielding two age populations of 2960 and 1966 Ma. Consequently, the tectonometamorphic evolution of the Tongbai Complex is quite similar to that of the Northern Dabie Complex, but the Tongbai Complex is likely to be positioned at a higher crustal level in the orogenic edifice. Furthermore, the lower metamorphic P-T conditions in Tongbaishan relative to the Dabie-Sulu region are hypothesized to have resulted from a shallower subduction. The younger metamorphic age (232-220 Ma) for the Tongbai Complex with respect to the overlying eclogite zones (metamorphism at ca. 255 Ma and cooling at ca. 238 Ma) reflects diachronous subduction and exhumation for these two HP slices. A similar process occurred in the Dabie and Sulu terranes. (C) 2010 Elsevier B.V. All rights reserved.
WOS关键词EAST-CENTRAL CHINA ; U-PB ZIRCON ; ULTRAHIGH-PRESSURE METAMORPHISM ; COESITE-BEARING ECLOGITES ; HF-ISOTOPE COMPOSITIONS ; HIGH-GRADE METAMORPHISM ; WESTERN YANGTZE BLOCK ; GA CONTINENTAL-CRUST ; SM-ND AGES ; TRACE-ELEMENT
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000283462000004
出版者ELSEVIER SCIENCE BV
资助机构Chinese '973' Project(2009CB825006) ; Chinese '973' Project(2009CB825006) ; National Natural Science Foundation of China(40672047) ; National Natural Science Foundation of China(40672047) ; Geological Investigation Project of China Geological Survey(1212010711812) ; Geological Investigation Project of China Geological Survey(1212010711812) ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; NSC 98-2116-M-001-009) ; NSC 98-2116-M-001-009) ; Chinese '973' Project(2009CB825006) ; Chinese '973' Project(2009CB825006) ; National Natural Science Foundation of China(40672047) ; National Natural Science Foundation of China(40672047) ; Geological Investigation Project of China Geological Survey(1212010711812) ; Geological Investigation Project of China Geological Survey(1212010711812) ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; NSC 98-2116-M-001-009) ; NSC 98-2116-M-001-009) ; Chinese '973' Project(2009CB825006) ; Chinese '973' Project(2009CB825006) ; National Natural Science Foundation of China(40672047) ; National Natural Science Foundation of China(40672047) ; Geological Investigation Project of China Geological Survey(1212010711812) ; Geological Investigation Project of China Geological Survey(1212010711812) ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; NSC 98-2116-M-001-009) ; NSC 98-2116-M-001-009) ; Chinese '973' Project(2009CB825006) ; Chinese '973' Project(2009CB825006) ; National Natural Science Foundation of China(40672047) ; National Natural Science Foundation of China(40672047) ; Geological Investigation Project of China Geological Survey(1212010711812) ; Geological Investigation Project of China Geological Survey(1212010711812) ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; National Science Council of Taiwan(NSC 97-2116-M-001-003 ; NSC 98-2116-M-001-009) ; NSC 98-2116-M-001-009)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72440]  
专题中国科学院地质与地球物理研究所
通讯作者Liu, Xiaochun
作者单位1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
2.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan
3.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China
4.China Univ Geosci, Fac Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiaochun,Jahn, Bor-ming,Cui, Jianjun,et al. Triassic retrograded eclogites and Cretaceous gneissic granites in the Tongbai Complex, central China: Implications for the architecture of the HP/UHP Tongbai-Dabie-Sulu collision zone[J]. LITHOS,2010,119(3-4):211-237.
APA Liu, Xiaochun,Jahn, Bor-ming,Cui, Jianjun,Li, Sanzhong,Wu, Yuanbao,&Li, Xian-hua.(2010).Triassic retrograded eclogites and Cretaceous gneissic granites in the Tongbai Complex, central China: Implications for the architecture of the HP/UHP Tongbai-Dabie-Sulu collision zone.LITHOS,119(3-4),211-237.
MLA Liu, Xiaochun,et al."Triassic retrograded eclogites and Cretaceous gneissic granites in the Tongbai Complex, central China: Implications for the architecture of the HP/UHP Tongbai-Dabie-Sulu collision zone".LITHOS 119.3-4(2010):211-237.

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