山东乳山南东庄金矿床地质特征及找矿潜力分析

Analysis on Geological Characteristics and Prospecting Potential of Nandongzhuang Gold Deposit in Rushan City in Shandong Province

南东庄金矿位于胶东昆嵛山-乳山凸起西北部,牟(平)-乳(山)金成矿带北端。该文通过矿床地质特征、围岩蚀变、控矿构造等方面展开综合研究,划分了蚀变组合分带及成矿阶段,总结了矿体赋存规律。矿体严格受NNE或NE向断裂带控制,呈脉状、透镜状产出,具尖灭再现特点。围岩蚀变主要有绢英岩化、硅化、黄铁矿化、钾化、绿帘石化、绿泥石化等,并具明显蚀变组合分带。矿床的成矿阶段划分为5期,其中石英-黄铁矿阶段和多金属硫化物阶段是主要的金成矿阶段。通过区域及矿区两方面成矿地质条件分析,认为该区具良好的找矿前景。

Nandongzhuang gold deposit is located at northwest of Kunyushan Rushan uplift,and north of Muping Rushan gold metallogenic belt.Through comprehensive study on geological characteristics,alteration of country rocks and ore controlling structures,alteration assemblage zoning and metallogenic stages have been divided,and occurrence regularity of ore body has been summarized.The ore bodies are strictly controlled by fault belts with the trend of NNE and NE,and occurred in vein and lenticular types.Fractures have the characteristics of balk reappear.The alterations of country rocks are mainly phyllic alteration,silification,pyritization,potassic alteration,epidotization and chloritization with obvious alteration assemblage zoning.The mineralization can be divided into five stages,and major metallogenic stages are quartz pyrite mineralization stage and polymetallic sulfidization stage.Based on analysis of regional metallogenic conditions and geological conditions in mining area,it is regarded that there is good prospecting potentiality in Nandongzhuang gold deposit.