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西藏冈底斯东段南缘桑布加拉辉钼矿Re-Os定年及地质意义

赵珍 胡道功 吴珍汉 陆露

易明初, 吴珍汉, 胡道功, 等, 2003. 青藏铁路沿线南北向活动构造及对路基工程的影响. 地质力学学报, 9 (4): 343-354.
引用本文: 赵珍, 胡道功, 吴珍汉, 等, 2012. 西藏冈底斯东段南缘桑布加拉辉钼矿Re-Os定年及地质意义. 地质力学学报, 18 (2): 178-186.
YI Ming-chu, WU Zhen-han, HU Dao-gong, et al., 2003. N-S-TRENDING ACTIVE STRUCTURES ALONG THE QINGHAI TIBET RAILWAY AND THEIR INFLUENCES ON RAILWAY BED ENGINEERING. Journal of Geomechanics, 9 (4): 343-354.
Citation: ZHAO Zhen, HU Dao-gong, WU Zhen-han, et al., 2012. MOLYBDENITE Re-Os ISOTOPIC DATING OF SANGBUJIALA COPPER DEPOSIT IN THE SOUTH MARGIN OF THE EASTERN GANGDESE SECTION, TIBET, AND ITS GEOLOGICAL IMPLICATIONS. Journal of Geomechanics, 18 (2): 178-186.

西藏冈底斯东段南缘桑布加拉辉钼矿Re-Os定年及地质意义

基金项目: 

中国地质调查局项目 1212011120185

详细信息
    作者简介:

    赵珍(1987-), 女, 硕士研究生, 构造地质学专业。E-mail:zhaozhen03@126.com

  • 中图分类号: P597

MOLYBDENITE Re-Os ISOTOPIC DATING OF SANGBUJIALA COPPER DEPOSIT IN THE SOUTH MARGIN OF THE EASTERN GANGDESE SECTION, TIBET, AND ITS GEOLOGICAL IMPLICATIONS

  • 摘要: 雅鲁藏布江缝合带北侧的桑布加拉矽卡岩型铜矿床为冈底斯成矿带南亚带典型多金属矿床之一。该矿床的8件辉钼矿样品Re-Os等时线年龄为(93.3±4.1)Ma,平均模式年龄为(94.5±1.6)Ma,表明桑布加拉矿床形成于晚白垩世新特提斯洋向北俯冲消减阶段。洋壳俯冲消减阶段形成的桑布加拉铜矿床及其新生代不同时期多金属矿床的发现,说明冈底斯成矿带在俯冲消减阶段、主碰撞阶段、晚碰撞阶段和后碰撞阶段均存在大规模成矿作用,并构成完整的成矿演化系列。

     

  • 图  1  冈底斯矿带地质简图及矿床分布(据文献[3]修改)

    Figure  1.  Simplified geological map of the Gangdese ore belt and distribution of deposits

    图  2  桑布加拉矿区地质简图

    Figure  2.  Simple geological map of Sangbujiala copper deposit

    图  3  桑布加拉矿区野外照片

    Figure  3.  Photos of Sangbujiala copper deposit

    图  4  桑布加拉铜矿辉钼矿Re-Os同位素等时线

    Figure  4.  Re-Os isotime line of molybdenite from Sangbujiala copper deposit

    图  5  桑布加拉铜矿辉钼矿Re-Os平均模式年龄

    Figure  5.  The average of Re-Os model age of molybdenite from Sangbujiala copper deposit

    图  6  冈底斯东段多期成矿事件年代学简图(据文献[1]修改)

    Figure  6.  Chronology of metallogenic stages in eastern Gangdese

    表  1  桑布加拉铜矿辉钼矿Re-Os同位素数据

    Table  1.   Re-Os isotopic datum of molybdenite from Sangbujiala copper deposit

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  • 收稿日期:  2011-12-08
  • 刊出日期:  2012-06-01

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