五台山东腰庄金矿地质特征及控矿因素

The Geological Characteristics and Ore-controlling Factors of Dongyaozhuang Gold Deposit in Wutai Mountain

通过对五台山东腰庄金矿地质特征及控矿因素的分析,说明矿床的展布形式受区域褶皱、断层和韧性剪切带控制,具明显的构造控矿特征,区内辉绿岩脉对成矿亦有重要作用;矿质富集与多期次广泛发育的钾长石蚀变作用有关;从原生矿、半氧化矿到氧化矿金含量逐渐升高,表明次生富集作用对提高金的品位有重要贡献。

According to the study on the geological characteristics and ore-controlling factors of Dongyaozhuang gold deposit in Wutai Mountain, the conclusion can be drawn that the distribution regularity of ore deposit is strictly controlled by regional structures ,such as the regional folds ,faults and ductile shear zone ,with a noticeable ore-controlling feature. The diabase plays an important role in the formation of ore body as well. The enrichment of the ore materials are closely related to the extensive and multi-stage potassium feldspathization. The increasing grade of Au from primary ore ,mixed ore to oxidized ore shows that the secondary enrichment is important to improve the Au grade.