平度市陶家寨矿区金矿地质特征及成因分析

Analysis on Geological Characteristics and the Origin of Taojiazhai Gold Deposit in Pingdu City

摘要:

平度市陶家寨矿区金矿床位于平度市旧店镇西南，属于中温热液裂隙充填石英脉型金矿床，控矿构造以NE向、NNE向断裂为主，具有膨大缩小、分支复合、尖灭再现的特征。区内共圈定金矿体5个，矿体呈脉状、透镜状，严格受断裂带控制。矿石矿物主要为黄铁矿、黄铜矿、方铅矿、闪锌矿等，矿石结构主要为半自形粒状结构、不等粒结构等，矿石构造主要为致密块状构造、团块状构造、网脉状构造、细脉浸染状构造等。矿体围岩为云山单元弱片麻状含石榴石细粒黑云二长花岗岩、北黄单元细粒含黑云二长花岗岩等。

Abstract:

Taojiazhai gold mining zone is located in southwestern area of Jiudian town in Pingdu city. It belongs to mesothermal quartz vein fissure-filling type, and is controlled by faults with the trend of NE and NNE. These faults have the characteristics of expanding-constructing and branching-combining. Five vein type gold ore bodies have been found.The main metal minerals are pyrite, chalcopyrite, gelenite and sphalerite. The ore textures include hypidiomorphic granular and heterogranular textures. The ore structures are consist of massive, mesh-vein and disseminated structures. The surrounding rocks are gneissic containing garnete fine grain biotite monzonitic granite of Yunshan unit and fine grain containing biotite monzonitic granite of Beihuang unit.