安徽巢湖苏家湾铜金矿床地质特征及找矿方向

苏家湾铜金矿床位于长江中下游Cu-Au-S-Fe成矿带滁县-庐江Cu-Au成矿亚带,其成因类型为矽卡岩-斑岩型铜金矿床。矿体总体呈囊状、透镜状,厚度、品位变化较大,受山里陈岩体两个不同岩性单元控制。其中,矽卡岩型铜金矿体主要赋存于闪长玢岩与震旦系碳酸盐地层内接触带,斑岩型金矿体主要产于花岗闪长斑岩体内部。本文全面系统总结了苏家湾铜金矿床矿区地质特征、矿化分布规律及围岩蚀变特征。并结合区域成矿地质背景分析,提出了矿床控矿因素和找矿标志,指明了找矿方向。

Geological Characteristics and Prospecting Direction of SujiawanCopper-gold Deposit in Chaohu,Anhui Province

The Sujiawan copper-gold deposit is located in the Chuxian-LujiangCu-Au mineralization sub-belt of the Middle and Lower Reaches of Yangtze River MetallogenicBelt,which genetic type is skarn-porphyry Cu-Au deposit.The orebody is cystic and lenticular as a whole,and its thickness and grade have wide range of variation.The mineralization is controlled by different lithologic unit of Shanlichen intrusive rocks,so the skarn-type copper-gold orebody occurred in the contact zone between diorite-porphyrite and carbonate strata,andthe porphyry-type gold orebody occurred in the interior of the granite porphyry.In this paper,we have summarized the geological characteristics,mineralization distribution and wall rock alteration of Sujiawan Cu-Au deposit,and put forward the ore-controlling factors and indicators,and point out the prospecting direction on the basis of analysis of regional metallogenic geological setting.