中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Continental origin of eclogites in the North Qinling terrane and its tectonic implications

文献类型：期刊论文

作者Wang, Hao1; Wu, Yuan-Bao1,2; Gao, Shan1; Liu, Xiao-Chi1; Liu, Qian1; Qin, Zheng-Wei1; Xie, Shi-Wen1; Zhou, Lian1; Yang, Sai-Hong2
刊名PRECAMBRIAN RESEARCH
出版日期2013-06-01
卷号230页码:13-30
关键词Eclogite Protolith nature North Qinling South China Block Continental rifting Arc-continent collision
ISSN号0301-9268
DOI10.1016/j.precamres.2012.12.010
文献子类Article
英文摘要Eclogites in an orogen, serving as a credible marker for deep subduction of oceanic or continental crust, are a key to decipher the process and fate of plate subduction. The nature of eclogite precursors bears important information on orogenic mechanism and pre-subducted geological history. Despite their importance, the nature of ultra-high pressure (UHP) eclogites in the North Qinling (NQ) terrane is still poorly constrained, which leads to conflicting tectonic scenarios for the evolution of the Qinling orogenic belt. In this paper, we provide a combined study of zircon U-Pb ages, major and trace element data, and Sr-Nd-Pb-Hf isotope compositions for eclogites from the NQ terrane. U-Pb age determinations on magmatic zircon cores of two eclogite samples yield similar ages of ca. 800 Ma, indicating that the protoliths of the NQUHP eclogites formed in the Neoproterozoic. The NQ eclogites have tholeiitic compositions and are characterized by high TiO2 (1.40-2.40%), and low P2O5 (0.09-0.22%), Na2O (1.10-2.49%) and K2O (0.17-1.04%) contents. They are moderate fractionation in REEs (La-N/Yb-N = 2.31-4.20) and show negligible Nb, Ta, Ti, and Eu anomalies (Eu/Eu* = 0.82-1.10). The eclogites have high positive whole-rock epsilon(Nd)(t) (2.81-5.53) and zircon epsilon(Hf)(t) (10.5-11.9) values, indicating their derivation from a relatively depleted mantle source. On geochemical discriminant diagrams based on immobile element ratios, the NQ eclogites fall in the field of continental basalts. Moreover, both the geochronological and geochemical features of the eclogite protoliths are quite different from those of the Erlanpging basaltic rocks, but comparable to those of the coeval continental basalts in South Qinling (SQ) orogen and the northern margin of the South China Block (SCB). As the mid-Neoproterozoic basaltic rocks in the SQ orogen and the northern margin of the SCB were well documented to form in a continental rift setting in response to the global-scale breakup of the Rodinia supercontinent, it is inferred that the NQ eclogite precursors might also form in a continental rift setting at ca. 800 Ma, which resulted in the splitting of the NQ terrane from the SCB. As the protoliths of the NQ eclogites have a continental property, we suggest that the ca. 490 Ma UHP metamorphism of the NQ unit might result from its northward subduction beneath the Erlangping arc and thus manifested an arc-continent collision process. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; PRESSURE METAMORPHIC ROCKS ; HF ISOTOPE COMPOSITION ; SOUTH CHINA BLOCKS ; EARLY PALEOZOIC METAMORPHISM ; NORTHWESTERN YANGTZE BLOCK ; WESTERN DABIE MOUNTAINS ; OROGENIC BELT ; SUBDUCTION ZONES ; TRACE-ELEMENT
WOS研究方向Geology
语种英语
WOS记录号WOS:000318379100002
出版者ELSEVIER SCIENCE BV
资助机构Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41173017) ; 41173017) ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; B07039 ; B07039 ; B07039 ; B07039 ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41173017) ; 41173017) ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; B07039 ; B07039 ; B07039 ; B07039 ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41173017) ; 41173017) ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; B07039 ; B07039 ; B07039 ; B07039 ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; Chinese 973 project(2009CB825006) ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; National Natural Science Foundation of China(41273035 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Chinese Geological Survey Bureau(SinoProbe-05-04 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Ministry of Education of China(IRT0441 ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) ; 41173017) ; 41173017) ; 41173017) ; 41173017) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; 1212011120162) ; B07039 ; B07039 ; B07039 ; B07039 ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659) ; NCET-06-0659)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86910]  
专题中国科学院地质与地球物理研究所
通讯作者Wu, Yuan-Bao
作者单位1.China Univ Geosci, Fac Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
2.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		 Wang, Hao,Wu, Yuan-Bao,Gao, Shan,et al. Continental origin of eclogites in the North Qinling terrane and its tectonic implications[J]. PRECAMBRIAN RESEARCH,2013,230:13-30.
APA Wang, Hao.,Wu, Yuan-Bao.,Gao, Shan.,Liu, Xiao-Chi.,Liu, Qian.,...&Yang, Sai-Hong.(2013).Continental origin of eclogites in the North Qinling terrane and its tectonic implications.PRECAMBRIAN RESEARCH,230,13-30.
MLA Wang, Hao,et al."Continental origin of eclogites in the North Qinling terrane and its tectonic implications".PRECAMBRIAN RESEARCH 230(2013):13-30.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。