许立权, 邓晋福, 陈志勇. 2004: 内蒙古中部印支期强过铝质花岗岩的相平衡约束及动力学背景. 地质通报, 23(8): 790-794.
    引用本文: 许立权, 邓晋福, 陈志勇. 2004: 内蒙古中部印支期强过铝质花岗岩的相平衡约束及动力学背景. 地质通报, 23(8): 790-794.
    XU Liquan, DENG Jinfu, CHEN Zhiyong. 2004: Phase equilibrium constraint on the generation of the Indosinian strongly peraluminous granites in central Inner Mongolia, and their geodynamic setting. Geological Bulletin of China, 23(8): 790-794.
    Citation: XU Liquan, DENG Jinfu, CHEN Zhiyong. 2004: Phase equilibrium constraint on the generation of the Indosinian strongly peraluminous granites in central Inner Mongolia, and their geodynamic setting. Geological Bulletin of China, 23(8): 790-794.

    内蒙古中部印支期强过铝质花岗岩的相平衡约束及动力学背景

    Phase equilibrium constraint on the generation of the Indosinian strongly peraluminous granites in central Inner Mongolia, and their geodynamic setting

    • 摘要: 岩石相平衡分析表明,内蒙古中部沿华北地台北缘分布的印支期(T3)后碰撞强过铝质花岗岩的源岩为含泥质成分较高的岩石,是在小于1.5GPa(约50km)条件下,由源岩中白云母及黑云母脱水部分熔融形成的,形成温度低于黑云母消失的上限温度,熔融残留物有斜长石、石榴子石和辉石。本区强过铝质花岗岩的CaO/Na2O比值(0.09~0.58)说明,其源岩中既有泥质岩,又有砂岩,与岩石相平衡分析的结果相一致;Al2O3/TiO2比值(53.78~413.94)表明,本区的强过铝质花岗岩为高温类型和高压类型之间的一种过渡类型。

       

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