滁州地区铜金矿控矿构造特征及资源潜力浅析

Analysis of Ore-controlling Structural Characteristics and Resource Potential of Copper-gold Deposits in Chuzhou Area

滁州地区横跨桐柏—大别—苏鲁和长江中下游2个成矿带,是重要的铜、金成矿区。通过野外调研和典型矿床控矿分析,明确了郯庐深大断裂带、黄破断裂和管马断裂等主要断裂构造特征及区内控岩控矿构造特征。郯庐深大断裂带和黄破断裂是区内一级控岩控矿断裂,分别控制了北北东向和北东向构造-岩浆-成矿作用,一级断裂的次级构造、层间破碎带、褶皱伸展部位和断裂交汇部位等是重要的容矿构造。生产矿山实践表明,在已有矿山深边部,斑岩-矽卡岩型铜金矿和石英脉-构造蚀变岩型金矿的找矿潜力较大,是本区下一步地质找矿工作重点勘查和开发利用目标。

Chuzhou area spans Tongbai-Dabie-Sulu and two metallogenic belts in the middle and low⁃er reaches of the Yangtze River,and is an important copper and gold metallogenic area.Through field investi⁃gation and ore-controlling analysis of typical deposits,the characteristics of main fault structures such as Tanlu deep fault zone,Huangdu fault and Guanma fault and the characteristics of rock-controlling and orecontrolling structures in the area are clarified.The Tanlu deep fault zone and the Huangpo fault are the firstorder rock-controlling and ore-controlling faults in the area,which control the NNE-trending and NEtrending tectonic-magma-mineralization,respectively.The secondary structure,interlayer fracture zone,fold extension part and fault intersection part of the first-order fault are important ore-bearing structures.The practice of production mines shows that the prospecting potential of porphyry-skarn type copper-gold deposit and quartz vein-structural altered rock type gold deposit is great in the deep and edge of the existing mines,which is the key exploration and development and utilization target of the next geological prospecting work in this area.