旧店金矿床12号脉地质特征及深部矿体定位预测

12号脉是旧店金矿床内近几年才勘探和开采的一条金矿脉。矿脉产于矿床内最大、最早勘探和开采的1号脉的下盘,与其平行,其控矿构造为右行斜列、首尾相连的断裂构造。矿脉内现已查明4个工业矿体,Au品位高、厚度薄,沿走向和倾向尖灭再现,在垂向和纵向上具有"行"、"列"分布的规律性。矿石中主要的硫化物为黄铁矿和少量的方铅矿、闪锌矿、黄铜矿等,工业矿物主要为微细粒自然金。矿石类型单一,为含金多金属硫化物-黄铁矿石英脉型。根据矿脉中矿体的赋存和分布规律及控矿条件分析,12号脉内-180～-260 m标高间的"行""列"重叠部位是深部矿体的有利赋存部位。

Geology Characteristics and deep-seated orebody site prediction of Gold Lode No.12 in Jiudian gold deposit

Gold Lode No.12 is a newly explored and mined lode in the territory of the Jiudian gold deposit.It is located,as a gold lode controlled by a right lateral en echelon fault,at the footwall of and parallel to the Gold Lode No.1,the largest and earliest explored gold lode in the deposit.In the lode,4 ore bodies with industrial significance have been proven and they are thin and high grade,pinch out along both the strike and dip,and also clustered in row and column in vertical and horizontal directions.The sulfides in the ores consist mainly of pyrite,and secondly of galena,sphalerite and chalcopyrite.Industrial minerals are mainly micro fine native gold.The ore belongs to the gold-bearing polymetallic sulfide-pyrite quartz vein type.Based on the occurrence and distribution rules of ore bodies in the lode and their ore-controlling regularities,the overlapped parts of the ＂row＂ and ＂column＂ at-180 m to-260 m level are ideal portion for hosting blind ore bodies and should be the future exploration targets.