内蒙古中部似斑状含榴石花岗岩特征及成因

FEATURES AND GENESIS OF PORPHYROID GARNETBEARING GRANITE IN THE MIDDLE OF INNER MONGOLIA

通过对内蒙古中部新太古代似斑状含榴石花岗岩进行岩相学及岩石地球化学方面的研究,并与黑云片麻岩进行岩石地球化学特征对比,发现两者在宏观地质特征与岩石地球化学特征上具有紧密的继承性,因此认为该花岗岩为新太古代区域变质岩在高级变质作用条件下经历原地经深熔作用、混合岩化作用所形成。

This paper performed petrographic and petrogeochemical study of Neoarchean porphyroid garnetbearing granite in the middle of Inner Mongolia, compared it with biotite gneiss geochemically, and found that the two have much in common in macro geological features and petrogechemical features, therefore concluded that the granite is formed by Neoarchean regional metamorphic rock that was subjected to anatectism and migmatization under high-grade metamorphic conditions.