吴锁平, 吴才来, 陈其龙. 2007: 阿尔金断裂南侧吐拉铝质A型花岗岩的特征及构造环境. 地质通报, 26(10): 1385-1392.
    引用本文: 吴锁平, 吴才来, 陈其龙. 2007: 阿尔金断裂南侧吐拉铝质A型花岗岩的特征及构造环境. 地质通报, 26(10): 1385-1392.
    WU Suo-ping, WU Cai-lai, CHEN Qi-long. 2007: Characteristics and tectonic setting of the Tula aluminous A-type granite at the south side of the Altyn Tagh fault, NW China. Geological Bulletin of China, 26(10): 1385-1392.
    Citation: WU Suo-ping, WU Cai-lai, CHEN Qi-long. 2007: Characteristics and tectonic setting of the Tula aluminous A-type granite at the south side of the Altyn Tagh fault, NW China. Geological Bulletin of China, 26(10): 1385-1392.

    阿尔金断裂南侧吐拉铝质A型花岗岩的特征及构造环境

    Characteristics and tectonic setting of the Tula aluminous A-type granite at the south side of the Altyn Tagh fault, NW China

    • 摘要: 吐拉花岗岩体位于阿尔金断裂南侧吐拉以东40km处。岩石化学以富Si高K、低Mg贫Ca、偏铝质及TFeO/MgO比值很高为特点,A/CNK比值为0.918~0.969。岩石稀土元素总量高,强烈富集HFSE,明显亏损Ba、Sr、P、Ti,稀土元素配分模式为典型的“右倾海鸥型”,属于偏铝质A型花岗岩,进一步分析属A2(PA)亚型岩体。该花岗岩形成于中泥盆世末期造山后的伸展环境,这一环境很可能与同期阿尔金断裂左行走滑引起的拉分作用有关。

       

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