王建平, 刘彦明, 李秋生, 岳国利, 裴放. 西藏班公湖——丁青蛇绿岩带东段侏罗纪盖层沉积的地层划分[J]. 地质通报, 2002, 21(7): 405-410.
    引用本文: 王建平, 刘彦明, 李秋生, 岳国利, 裴放. 西藏班公湖——丁青蛇绿岩带东段侏罗纪盖层沉积的地层划分[J]. 地质通报, 2002, 21(7): 405-410.
    WANG Jianping, LIU Yanming, LI Qiusheng, YUE Guoli, PEI Fang. Stratigraphic division and geological significance of the Jurassic cover sediments in the eastern sector of the Bangong Lake-Dgngqgn ophiolite belt in Tibet[J]. Geological Bulletin of China, 2002, 21(7): 405-410.
    Citation: WANG Jianping, LIU Yanming, LI Qiusheng, YUE Guoli, PEI Fang. Stratigraphic division and geological significance of the Jurassic cover sediments in the eastern sector of the Bangong Lake-Dgngqgn ophiolite belt in Tibet[J]. Geological Bulletin of China, 2002, 21(7): 405-410.

    西藏班公湖——丁青蛇绿岩带东段侏罗纪盖层沉积的地层划分

    Stratigraphic division and geological significance of the Jurassic cover sediments in the eastern sector of the Bangong Lake-Dgngqgn ophiolite belt in Tibet

    • 摘要: 根据对西藏班公湖-丁青缝合带东段丁青蛇绿岩及其盖层沉积研究,确定丁青蛇绿岩时代为晚三叠世,盖层沉积地层时代为中晚侏罗世,进一步划分为德极国组、德吉弄组和机末组,并建立了3个生物地层组合。据此首次提出班公湖-丁青缝合带东段于三叠纪打开,晚三叠世发育成为较成熟洋盆,并最终于早侏罗世末关闭。通过对班公湖-丁青缝合带东、西部地质特征的对比,指出该缝合带关闭时间从东部的早侏罗末到西部的晚侏罗世末,从而为特提斯演化进程提供了新证据。

       

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