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地质论评  2002 

内蒙古苏尼特左旗南白音宝力道岩体特征与成因―是岛弧岩浆岩而不是埃达克岩

Keywords: 内蒙古成因岛弧岩浆岩埃达克岩地球化学苏尼特左旗南白音宝力道

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Abstract:

内蒙古苏尼特左旗南白音宝力道岩体位于索伦缝合带上,主要由石英闪长岩、英云闪长岩和花岗闪长岩等中酸性岩石组成,含少量辉长闪长岩等基性岩石类型。岩石学、微量元素(含稀土元素)和同位素地球化学研究表明,该岩体属于典型的岛弧岩浆岩,形成于内蒙古洋向北俯冲消亡期间,而不是埃达克岩(adakites)系。

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