裴先治, 李勇, 陆松年, 陈志宏, 丁仨平, 胡波, 李佐臣, 刘会彬. 西秦岭天水地区关子镇中基性岩浆杂岩体锆石U-Pb年龄及其地质意义[J]. 地质通报, 2005, 24(1): 23-29.
    引用本文: 裴先治, 李勇, 陆松年, 陈志宏, 丁仨平, 胡波, 李佐臣, 刘会彬. 西秦岭天水地区关子镇中基性岩浆杂岩体锆石U-Pb年龄及其地质意义[J]. 地质通报, 2005, 24(1): 23-29.
    PEI Xianzhi, LI Yong, LU Songnian, CHEN Zhihong, DING Saping, HU Bo, LI Zuochen, LIU Huibin. Zircons U-Pb ages of the Guanzizhen intermediate-basic igneous complex in Tianshui area, West Qinling, and their geological significance.[J]. Geological Bulletin of China, 2005, 24(1): 23-29.
    Citation: PEI Xianzhi, LI Yong, LU Songnian, CHEN Zhihong, DING Saping, HU Bo, LI Zuochen, LIU Huibin. Zircons U-Pb ages of the Guanzizhen intermediate-basic igneous complex in Tianshui area, West Qinling, and their geological significance.[J]. Geological Bulletin of China, 2005, 24(1): 23-29.

    西秦岭天水地区关子镇中基性岩浆杂岩体锆石U-Pb年龄及其地质意义

    Zircons U-Pb ages of the Guanzizhen intermediate-basic igneous complex in Tianshui area, West Qinling, and their geological significance.

    • 摘要: 西秦岭天水关子镇地区新确定的流水沟变质中基性岩浆杂岩体主要由变质辉长岩-辉长闪长岩-闪长岩组成,地球化学特征显示其形成于岛弧构造环境。变质中基性岩浆杂岩的TIMS法锆石U-Pb同位素年龄为(507.5±3.0)Ma,表明西秦岭北带岛弧型岩浆岩的形成时代为晚寒武世,反映以关子镇蛇绿岩为代表的古洋盆的俯冲作用和形成火山-岩浆岛弧的时限可能为晚寒武世或稍早。

       

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