铜陵地区徐村铜金矿床地质特征及找矿前景分析

Geological Characteristics and Prospecting Prospect analysis of Xucun copper-gold deposit in Tongling area

铜陵矿集区是长江中下游多金属成矿带重要的矿集区,先后发现了铜官山矿田[1-4]、狮子山矿田、新桥矿田、凤凰山矿田[6]、沙滩角矿田[7]等五大矿田。近年来,在矿田外围发现了众多铜金矿床。其中徐村铜金矿床位于凤凰山矿田与沙滩角矿田之间,其矿床类型属于热液交代型。该矿体呈似层状、透镜状产出,受接触带及构造蚀变带控制。徐村铜金矿的发现,印证了桥头杨岩体为含矿性,为该区实现找矿突破提供了重要线索。根据矿体与碳酸盐岩围岩、石英闪长玢岩组合要素的空间关系,提出了该区的找矿方向。结果显示,该矿区深部及外围具有较好的找矿前景,尤其是深部接触带及岩体北接触带是寻找铜金矿体的有利地段。

The Tongling ore concentration area is an important ore concentration area in the polymetallic metallogenic belt in the middle and lower reaches of the Yangtze River,Five ore fields including Tongguanshan ore field,Shizishan ore field,Xinqiao ore field,Fenghuangshan ore field[6],and Shaanjiao ore field[7]have been discovered successively.In recent years,numerous copper and gold deposits have been discovered in the periphery of the ore field.Among them,the Xucun copper-gold deposit is located between the Fenghuangshan ore field and the ShaTanjiao ore field.The deposit type belongs to hydrothermal metasomatism.The ore body is layered and lenticular,and is controlled by the contact zone and structural alteration zone.The discovery of the Xucun copper-gold deposit confirms that the Qiaotouyang rock body is ore-bearing,and provides important clues for the breakthrough of ore prospecting in this area.According to the spatial relationship between the ore body,the carbonate wall rock,and the assemblage elements of the quartz diorite porphyrite,the prospecting direction of this area is put forward.The results show that the deep and peripheral parts of the mining area have good prospecting prospects,especially the deep contact zone and the northern contact zone of the rock mass are favorable areas for finding copper-gold ore bodies.