胶东谢家沟金矿床地质特征与成矿时代研究

The Research on The Geological Feature and Mineralization Age of Xiejiagou Gold Deposit In Jiaodong Area

对谢家沟金矿床进行的地质学，年代学研究表明，矿石中的金主要以微细粒金包裹于黄铁矿、黄铜矿等矿物之中；矿石绢英岩化强烈，并伴有不同程度的钾化，是典型的破碎蚀变岩型金矿床。对该金矿床进行系统的K—Ar法年代测定，结果表明谢家沟金矿的成矿年龄为105—130Ma，与前人研究的胶东地区金矿的成矿年龄相一致，说明它们是同一期岩浆热事件的产物，都与区域性分布的郭家岭花岗岩的成岩时代相吻合，二者具有成因上的联系。

The research on the geological feature and mineralization age of Xiejiagou gold deposit, shows that Au is mostly included in pyrite, chalcopyrite, etc. in the pattern of fine grain. The ores are strongly sericitized and silicified, and there is often potassic alteration of different degree. There-fore, it is a classic fracture -altered rock -type gold deposit. The result of systematic K -Ar age measurement on rocks of the gold deposit, indicates that the mineralization age of Xiejiagou gold deposit is 105 - 130Ma which is in accordance with the common Au - mineralization age of Jiaodong area. We can think that they are the result of the same magmatic event. The mineralization age is same as the rock - forming age of Guojialing granite, so there is maybe genetic relation between Au - mineralization and Guojialing granite.