胶东海域金矿床元素富集贫化特征及深部预测

张亮亮, 朱立新, 马生明, 林少一, 戴长国, 周明岭, 霍光, 徐忠华, 席明杰, 张涛

Elements enrichment and dilution characteristics and deep metallogenic prognosis in the Haiyu gold deposit, Jiaodong Peninsula

ZHANG Liang-Liang, ZHU Li-Xin, MA Sheng-Ming, LIN Shao-Yi, DAI Chang-Guo, ZHOU Ming-Ling, HUO Guang, XU Zhong-Hua, XI Ming-Jie, ZHANG Tao

图2 海域金矿蚀变岩及金矿物显微特征 a—钾化,见钾长石包裹斜长石;b—主裂面上盘绢英岩化,可见绢云母面状蚀变交代钾长石、斜长石,硅化体现为波状消光石英;c—黄铁绢英岩化碎裂岩,斜长石、钾长石均蚀变为绢云母和石英,含金矿铁矿呈脉状分布;d—黄铁绢英岩化碎裂岩中的星散状黄铁矿;e—金矿物以角砾状包体金和线状晶隙金形态分布于黄铁矿中;f—金矿物以椭圆状包体嵌布在黄铁矿中;Kf—钾长石;Pl—斜长石;Qz—石英;Ser—绢云母;Py—黄铁矿;Au—金矿物

Fig.2 Microscopic characteristics of altered rocks and gold deposits in Haiyu gold deposit a—potassium, the picture shows potassium feldspar wrapped plagioclase; b—sericification of the hanging wall of the fault, it can be seen that the sericite surface alteration metasomatizes potassium feldspar and plagioclase, and the silicification is embodied as wavy matte quartz; c—pyrite-sericite-quartzized cataclastic rock, where plagioclase and potash feldspar are all corroded into sericite and quartz, and gold-bearing pyrites are distributed in veins; d—scattered pyrite in pyrite-sericite-quartzized cataclastic rocks; e—gold minerals are distributed in pyrite in the form of brecciated inclusion gold and linear interstitial gold; f—gold minerals are encased in pyrite in an oval shape;Kf—potash feldsparl;Pl—plagioclase;Qz—quartz;Ser—sericite;Py—pyrite;Au—gold mineral