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青藏高原羌塘中部蓝片岩的地球化学特征及其构造意义

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邓希光 AnYIN. 青藏高原羌塘中部蓝片岩的地球化学特征及其构造意义[J]. 岩石学报, 2002, 18(4): 517-525.
引用本文: 邓希光 AnYIN. 青藏高原羌塘中部蓝片岩的地球化学特征及其构造意义[J]. 岩石学报, 2002, 18(4): 517-525.
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DENG XiGuang 1,2,DING Lin 1,LIU XiaoHan 1,An YIN 3,Paul A KAPP 3,M ichael A MURPHY 3 and Craig E MANNING 31. Laboratory of Lithosphere Tectonic Evolution,Institute of Geology and Geophy sics,Chinese Academy of Sciences,Beijing 100029,China, 2. Guangzhou Institute of Ceochemistry,Chinese Acaelemy of Sciences,Guangzhou 510640,China, 3. Department of Earth and Space Sciences,University of California,Los Angeles,CA 90095-156702,U.S.A.. Geochem ical characteristics of the blueschists and its tectonic significance in the cen tral Qiangtang area, Tibet[J]. Acta Petrologica Sinica, 2002, 18(4): 517-525.
Citation: DENG XiGuang 1,2,DING Lin 1,LIU XiaoHan 1,An YIN 3,Paul A KAPP 3,M ichael A MURPHY 3 and Craig E MANNING 31. Laboratory of Lithosphere Tectonic Evolution,Institute of Geology and Geophy sics,Chinese Academy of Sciences,Beijing 100029,China, 2. Guangzhou Institute of Ceochemistry,Chinese Acaelemy of Sciences,Guangzhou 510640,China, 3. Department of Earth and Space Sciences,University of California,Los Angeles,CA 90095-156702,U.S.A.. Geochem ical characteristics of the blueschists and its tectonic significance in the cen tral Qiangtang area, Tibet[J]. Acta Petrologica Sinica, 2002, 18(4): 517-525.
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青藏高原羌塘中部蓝片岩的地球化学特征及其构造意义

    • 中国科学院地质与地球物理研究所岩石圈构造演化开放研究实验室，中国科学院地质与地球物理研究所岩石圈构造演化开放研究实验室，中国科学院地质与地球物理研究所岩石圈构造演化开放研究实验室，Department of Earth and Space Sciences，University of California，Los Angeles，Department of Earth and Space Sciences，University of California，Los Angeles，Department of

  • 基金项目:

    国家重点基础研究专项 ( G1 9980 4 0 80 0 )经费资助，中科院青藏高原研究项目 ( KZ951 - A 1 - 2 0 4 KZ95T- 0 6 )，国家博士后基金“西藏中部冈玛日蓝片岩的地球化学及年代学研究”成果

Geochem ical characteristics of the blueschists and its tectonic significance in the cen tral Qiangtang area, Tibet

    摘要
  • 青藏高原羌塘中部的冈玛日－桃形错地区蓝片岩被认为是板块构造边界的产物，通过对其主量元素、微量元素和稀土元素的地球化学特征的综合研究，其原岩属于洋岛型碱性玄武岩。再结合该地区的地质研究，表明在该地区存在一个古提斯洋，可以作为晚古生代冈瓦纳与劳亚大陆的分界线。
    Blueschists are considered as the mark of plate tectonic boundary in the Gangmar -Taoxing Co area, central Qiangtang, Tibet. Based on geochemical characteristic s of major, trace and rare earth elements and the geochemical diagram, the proto lith of blueschists belongs to alkali basalt that is a skin to intraplate ocean island basalts, and formed on seamount-like structures under an intraplate plum e. Together with the geological features, it shows that it presents a Palaeo-Te thyan ocean in the central Qiangtang area. Therefore, the area may represent the boundary between Gondwana and Laurasia continents during the Late Paleozoic per iod.
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修回日期:  2000-01-17
刊出日期:  2002-11-30

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