西藏改则地区拉果错蛇绿岩地球化学特征及成因

王保弟 许继峰 曾庆高 康志强 陈建林 董彦辉. 西藏改则地区拉果错蛇绿岩地球化学特征及成因[J]. 岩石学报, 2007, 23(6): 1521-1530.
引用本文: 王保弟 许继峰 曾庆高 康志强 陈建林 董彦辉. 西藏改则地区拉果错蛇绿岩地球化学特征及成因[J]. 岩石学报, 2007, 23(6): 1521-1530.
WANG BaoDi, XU JiFeng , ZENG QingGao, KANG ZhiQiang , CHEN JianLin and DONG YanHui. Geochemistry and genesis of Lhaguo Tso ophiolite in south of Gerze area-Center Tibet[J]. Acta Petrologica Sinica, 2007, 23(6): 1521-1530.
Citation: WANG BaoDi, XU JiFeng , ZENG QingGao, KANG ZhiQiang , CHEN JianLin and DONG YanHui. Geochemistry and genesis of Lhaguo Tso ophiolite in south of Gerze area-Center Tibet[J]. Acta Petrologica Sinica, 2007, 23(6): 1521-1530.

西藏改则地区拉果错蛇绿岩地球化学特征及成因

  • 基金项目:

    国家重点基础研究发展规划项目(2002CB412602)、中国科学院知识创新工程重要方向性项目(KZCX3-SW-143)、国家杰出青年基金项目(40425003)和中国地质调查局国土资源大调查项目(200313000017)资助.致谢 本文的前期工作为西藏地质调查院承担的1:25万改则幅、日干配错幅区调,参加野外工作的还有毛国政、陈国荣、刘保民、尼玛次仁、赵守仁、小格桑等,张旗研究员以及两位审稿专家提出了宝贵的修改意见,在此一并表示衷心的感谢!

Geochemistry and genesis of Lhaguo Tso ophiolite in south of Gerze area-Center Tibet

  • 拉果错蛇绿岩位于西藏改则县南侧,是班公湖-怒江缝合带南侧蛇绿岩带中发育最完整的蛇绿岩之一,可能形成于晚侏罗世-早白垩世,主要由地幔橄榄岩、堆晶岩、枕状熔岩、岩墙、斜长花岗岩及放射虫硅质岩等构造单元组成.微量元素分析结果表明该蛇绿岩中的中基性岩富集Sr、Rb等大离子亲石元素,亏损Nb、Ta等高场强元素,具有岛弧型火山岩的特点,其在稀土元素球粒陨石标准化配分图解中主要显示平坦型曲线,它们可能是由消减板片流体交代的地幔楔源区的部分熔融形成.拉果错蛇绿岩可能形成于弧间盆地环境,代表了班公湖.怒江缝合带南侧弧-弧碰撞的产物.
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出版历程
修回日期:  2007-01-08
刊出日期:  2007-06-30

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