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    刘会彬, 裴先治, 丁仨平, 李佐臣, 孙仁奇. 2006: 西秦岭天水市元龙地区新元古代花岗质片麻岩锆石LA-ICP-MSU-Pb定年及其地质意义. 地质通报, 25(11): 1315-1320.
    引用本文: 刘会彬, 裴先治, 丁仨平, 李佐臣, 孙仁奇. 2006: 西秦岭天水市元龙地区新元古代花岗质片麻岩锆石LA-ICP-MSU-Pb定年及其地质意义. 地质通报, 25(11): 1315-1320.
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    LIU Hui-bin, PEI Xian-zhi, DING Sa-ping, LI Zuo-chen, SUN Ren-qi Faculty of Earth Science and Land Resources. 2006: LA-ICP-MS zircon U-Pb dating of the Neoproterozoic granitic gneisses in the Yuanlong area, Tianshui City, West Qinling China, and their geological significance.. Geological Bulletin of China, 25(11): 1315-1320.
    Citation: LIU Hui-bin, PEI Xian-zhi, DING Sa-ping, LI Zuo-chen, SUN Ren-qi Faculty of Earth Science and Land Resources. 2006: LA-ICP-MS zircon U-Pb dating of the Neoproterozoic granitic gneisses in the Yuanlong area, Tianshui City, West Qinling China, and their geological significance.. Geological Bulletin of China, 25(11): 1315-1320.
    shu

    西秦岭天水市元龙地区新元古代花岗质片麻岩锆石LA-ICP-MSU-Pb定年及其地质意义

    LA-ICP-MS zircon U-Pb dating of the Neoproterozoic granitic gneisses in the Yuanlong area, Tianshui City, West Qinling China, and their geological significance.

      摘要
    • 摘要: 西秦岭元龙花岗质片麻岩位于天水市伯阳—元龙之间的渭河断裂北侧。花岗质片麻岩中锆石Th/U比值较高,阴极发光图像显示锆石内部发育振荡环带,具岩浆成因特点。LA-ICP-MS的锆石U-Pb同位素206Pb/238U加权平均年龄为(924.2±2.7)Ma(MSWD=0.67),表明花岗岩岩体形成于新元古代,反映晋宁期西秦岭北缘曾存在一次俯冲碰撞事件,与Rodinia超大陆的汇聚事件一致。

       

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