安徽省铜陵市金口岭铜矿成矿地质特征及找矿标志

Metallogenic Geological Characteristics and Prospecting Indicator of Jinkouling Copper Mine in Tongling City,Anhui province

金口岭铜矿属铜官山矿田的组成部分,产于石英闪长岩体与南陵湖组、龙山组的接触带上,呈不规则的脉状和透镜状展布。随着该矿不断开采,矿山资源储量急剧减少,开展深部找矿工作对延长矿山服务年限具有重要意义。结合矿区相关地质工作成果,在分析该矿区域成矿地质背景的基础上,对矿区及矿床地质特征、找矿标志进行了详细分析。研究表明:(1)矿区内的褶皱构造为金口岭向斜和铜官山背斜,区内断裂构造具有多期性、继承性的特征,按与成矿过程的相对时期关系可划分为成矿前断裂、成矿期断裂以及成矿后断裂;(2)矿区地层岩性、构造、围岩蚀变及地球化学异常为有利找矿标志。

Jinkouling Copper Mine is the part of the Tongguanshan copper ore field, it is hosted in the contact zone of quartz diorite rock mass and Nanlinhu formation and Longshan formation, and it is distributed with irregular vein type and lenticular type. With the continuous exploitation, the resource reserve is threatened for being exhausted, therefore, it is necessary to conduct deep prospecting and exploration work in the mining area to extend the service length of the mine. Based on the related geological working results of the mining area, the regional geological background, the geological characteristics of the mining area and deposits are discussed in detail, besides that, the prospecting indicators of the mining area are al- so summarized. The results show that：（~）the fold structures of the mining area are Jinkouling syncline and Tongguanshan anticline,the fault structures of the mining area with the characteristics of multi-phase and inheritance, based on the relationship of the fault structures to metallogenic, the fault structures can be di- vided into former metallogenic fault,metallogenic fault and later metallogenic fault;（~）the favorable pros- pecting indicators of the mining area are strata lithology, structure, surrounding rock alteration and geochemical anomaly. The above analysis results related to the metallogenic geological characteristics and prospecting indicators of the mining area can provide some reference for the further prospecting and exploration work of copper deposit in the area.