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
The collision between the Yili and Tarim blocks of the Southwestern Altaids: Geochemical and age constraints of a leucogranite dike crosscutting the HP-LT metamorphic belt in the Chinese Tianshan Orogen

文献类型：期刊论文

作者Gao, Jun1; Klemd, Reiner2; Qian, Qing1; Zhang, Xi1; Li, Jilei1,2; Jiang, Tuo1; Yang, Yongqiang3
刊名TECTONOPHYSICS
出版日期2011-03-02
卷号499期号:1-4页码:118-131
关键词Leucogranite dike Collision Yili block Tarim block Tianshan Southwestern Altaids
ISSN号0040-1951
DOI10.1016/j.tecto.2011.01.001
文献子类Article
英文摘要A ca. 600 m-long, 0.5-20 m-wide NW-SE trending granite dike crosscuts the high pressure-low temperature (HP-LT) Tianshan metamorphic belt, the foliation of which is parallel to the main ENE regional trend in the Chinese South Tianshan Orogen. It is mainly composed of plagioclase. K-feldspar, quartz, muscovite, biotite and secondary chlorite, while fluorite, zircon and xenotime occur as accessories. The immediate country rock is a quartz-biotite-plagioclase schist, which grades several tens of meters away from the granite dike into a chlorite-mica-albite schist. The latter schist is intimately intercalated with blueschist layers and boudins. The A/CNK value of the granite dike samples varies from 1.15 to 1.27 indicating a strongly peraluminous composition. CaO/Na(2)O ranges from 0.06 to 0.17 and Al(2)O(3)/TiO(2) from 240 to 525, similar to the ratios of strongly peraluminous (SP) granites exposed in 'high-pressure' collision zones such as the Himalayas. A zircon U-Pb age of 285 Ma was obtained for the granite dike, thus constraining the upper limit for the age of HP-LT metamorphism. The petrological and geochemical data suggest that the SP leucogranite dike intruded during the exhumation of overthickened crust in the post-collisional setting between the Yili (-Central Tianshan) and Tarim blocks. The dataset presented here in conjunction with previously published data corroborate that the HP-LT metamorphism must have occurred earlier than the Permian in the Tianshan Orogen. Therefore, the collision between the Yili (-Central Tianshan) and Tarim blocks and the final amalgamation of the Southwestern Altaids must have been terminated in Late Paleozoic and not in Triassic times as previously suggested. (C) 2011 Elsevier B.V. All rights reserved.
WOS关键词ULTRAHIGH-PRESSURE METAMORPHISM ; FLUID-ROCK INTERACTION ; SOUTH-TIEN-SHAN ; P-T PATH ; PALEOZOIC TECTONIC AMALGAMATION ; TRACE-ELEMENT MOBILIZATION ; A-TYPE GRANITES ; NW-CHINA ; WESTERN TIANSHAN ; CENTRAL-ASIA
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000288921300008
出版者ELSEVIER SCIENCE BV
资助机构National Basic Research Program of China(2007CB411302) ; National Basic Research Program of China(2007CB411302) ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; 40672153 ; 40672153 ; 4071062 ; 4071062 ; 40872057) ; 40872057) ; National Basic Research Program of China(2007CB411302) ; National Basic Research Program of China(2007CB411302) ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; 40672153 ; 40672153 ; 4071062 ; 4071062 ; 40872057) ; 40872057) ; National Basic Research Program of China(2007CB411302) ; National Basic Research Program of China(2007CB411302) ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; 40672153 ; 40672153 ; 4071062 ; 4071062 ; 40872057) ; 40872057) ; National Basic Research Program of China(2007CB411302) ; National Basic Research Program of China(2007CB411302) ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; Deutsche Forschungsgemeinschaft(KL 692/17-2) ; 40672153 ; 40672153 ; 4071062 ; 4071062 ; 40872057) ; 40872057)
源URL[http://ir.iggcas.ac.cn/handle/132A11/74346]  
专题中国科学院地质与地球物理研究所
通讯作者Gao, Jun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Jun,Klemd, Reiner,Qian, Qing,et al. The collision between the Yili and Tarim blocks of the Southwestern Altaids: Geochemical and age constraints of a leucogranite dike crosscutting the HP-LT metamorphic belt in the Chinese Tianshan Orogen[J]. TECTONOPHYSICS,2011,499(1-4):118-131.
APA Gao, Jun.,Klemd, Reiner.,Qian, Qing.,Zhang, Xi.,Li, Jilei.,...&Yang, Yongqiang.(2011).The collision between the Yili and Tarim blocks of the Southwestern Altaids: Geochemical and age constraints of a leucogranite dike crosscutting the HP-LT metamorphic belt in the Chinese Tianshan Orogen.TECTONOPHYSICS,499(1-4),118-131.
MLA Gao, Jun,et al."The collision between the Yili and Tarim blocks of the Southwestern Altaids: Geochemical and age constraints of a leucogranite dike crosscutting the HP-LT metamorphic belt in the Chinese Tianshan Orogen".TECTONOPHYSICS 499.1-4(2011):118-131.

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。