广西某地金矿成矿条件研究

Study on the metallogenic conditions of gold deposits in Guangxi

广西金矿床必须同时具备有中酸性岩浆岩,花岗岩、中细粒黑云母花岗岩三个成矿条件。各类型原生金矿床之内或外围往往出露或隐伏有一般是含金的花岗岩岩体或次岩浆岩体。中细粒黑云母花岗岩和粗中粒似斑状黑云母花岗岩的稀土元素含量较高,并随含金量增高而提高,这两种载金矿物与含金花岗岩石的稀土元素组成特征和球粒标准化分布模式一致。

Guangxi gold deposit must have three metallogenic conditions： intermediate acid magmatic rock, granite and medium fine biotite granite. There are usually granite or sub magmatic rock bodies with gold bearing inside or outside each type of primary gold deposits. The rare earth element content of the medium fine granitic granite and the coarse granitic porphyritic granitic granite is higher, and increases with the increase of the gold content. These two kinds of gold bearing minerals are in accordance with the rare-earth elements of the rocks containing Jinhua gang and the distribution pattern of the spherulite standardization.