摘要
铜陵宝山陶银铅锌矿床位于贵池—繁昌断褶束舒家店背斜南东翼,新屋里岩体北东侧,是近年来新发现的一处中型银铅锌多金属矿床。结合区域及矿区勘查成果,总结了成矿地质背景、矿床地质特征、矿体特征、矿石特征等,并对控矿因素及矿床成因进行了分析。研究表明:①矿体主要赋存于栖霞组(P1q)、孤峰组(P1g)、龙潭组(P2l)、大隆组(P2d),主要受层间滑动构造控制,矿体多呈似层状、透镜状产出;矿体沿走向控制长度达2 200 m,走向50°~60°,倾向SE,倾角60°~85°,沿倾向延深最大达591 m,矿体具有膨胀收缩、尖灭再现特征。②矿石中金属矿物主要由黄铁矿、方铅矿、闪锌矿和少量的黄铜矿、黝铜矿、毒砂及微量的银金矿、自然银、白铁矿、碲银矿等组成,脉石矿物主要由少量的石英和方解石组成。矿石构造主要为细脉状构造、浸染状构造等。③矿床成因属中低温热液充填型银铅锌矿床。在上述分析的基础上,进行了区域找矿潜力探讨,认为铜陵地区存在着较好的铅锌成矿潜力。
Baoshantao Ag-Pb-Zn Deposit in Tongling is located in the southeastern wing of Shujiadian anticline in Guichi-Fanchang fault fold bundle and the northeast side of Xinwuli rock mass.It is a medium-sized Ag-Pb-Zn polymetallic deposit newly discovered in recent years.Based on the regional and mining exploration results,the metallogenic geological background and geological characteristics of the deposit,ore body characteristics and ore characteristics are summarized,and the ore-controlling factors and genesis of the deposit are analyzed.The results show that:① orebodies mainly occur in Qixia Formation(P1 q),Gufeng Formation(P1 g),Longtan Formation(P2 l) and Dalong Formation(P2 d),mainly controlled by interlayer sliding structures,and ore bodies are mostly layered and lenticular in shape.The controlled length of ore body along strike reaches 2 200 m,ore body strike is 50°~60°,dip direction is southeast with 60°~85° dip angle,and the maximum depth along the dip is 591 m.The orebody is characterized by expansion,shrinkage and pinch-out reappearance.② Metal minerals in ores are mainly composed of pyrite,galena,sphalerite and a small amount of chalcopyrite,tetrahedrite,arsenopyrite and trace silver-gold ore,natural silver,white iron ore and hessite.Gangue minerals are mainly composed of a small amount of quartz and calcite.The ore structure is mainly veinlet structure and disseminated structure.③ The genesis of the deposit belongs to a medium-low temperature hydrothermal filling type Ag-Pb-Zn deposit.On the basis of the above analysis,the regional prospecting potential is discussed,and it is concluded that there is a good potential of Pb-Zn mineralization in Tongling area.
作者
胡彦强
丁瑞颖
林鑫
HU Yanqiang;DING Ruiying;LIN Xin(Geological Team of East China Metallurgical Bureau of Geology and Exploration,Hefei 238000,China;School of Earth Science and Resources,Chang'an University,Xi'an 710000,China)
出处
《金属矿山》
CAS
北大核心
2020年第9期159-166,共8页
Metal Mine
关键词
银铅锌多金属矿
中低温热液型
地质特征
找矿潜力
Ag-Pb-Zn polymetallic ore
medium-low temperature hydrothermal
geological characteristics
mining potential