胶东阎家疃金矿床地质特征及成因研究

Study on Geological Characteristics and the Origin of Yanjiatuan Gold Deposit in Jiaodong Area

摘要:

胶东阎家疃金矿地处胶东牟乳成矿带北段，矿体受金牛山主断裂西侧的次级断裂控制，赋存于玉林店单元岩体中。通过对矿区内矿化蚀变带和矿体特征、矿石质量等方面的总结和研究，认为区内矿石类型以含金黄铁绢英岩化花岗质蚀变岩为主，局部夹少量黄铁矿化石英脉，并划分出成矿阶段。类比邻区金矿蚀变岩形成时代，结合区域成矿地质背景，认为该区矿床成因类型主要为中低温热液蚀变型金矿床。该矿床的研究，对牟乳成矿带内蚀变岩型金矿床的找矿工作提供了指示意义。

Abstract:

Yanjiatuan gold deposit in Jiaodong area is located in the north part of Muping-Rushan gold metallogenic belt. The ore body is controlled by the secondary fracture in the west of Jinniushan main fault amd occurred in rock mass in Yulindiant unit. By summarizing and studying the mineralized alteration zone, ore body characteristics and ore quality in the mining area, it is believed that the ore type is composed of golden iron sericite granitic clastic rock and a small amount of pyrite-mineralized quartz vein. The metallogenic stage is divided as well. Comparing with the age of altered rock formation in the adjacent area of gold deposits, and combining with regional metallogenic geological background, it is believed that main genetic type is the middle low temperature hydrothermal alteration gold deposit. The study of the deposit provides a directive significance for the prospecting work of altered rock type gold deposits in Muping-Rushan gold metallogenic belt.