安徽金寨地区铅锌钼矿床成矿特征及找矿前景分析

Metallogenic characteristics and prospecting potential of lead-zinc molybdenum deposits in Jinzhai,Anhui

金寨地区位于安徽北淮阳成矿带西段,根据区域地质构造背景和已知铅锌钼多金属矿床的分布规律,将金寨地区划分为4个矿化集中区。归纳总结了区内的矿床成因类型,主要有斑岩型、岩浆热液型、矽卡岩型和角砾岩型等,并就各成因类型进行了典型矿床的举例。对区内铅锌钼多金属矿床的找矿前景综合分析提出:银沙矿化集中区以寻找斑岩型和岩浆热液型铅锌钼多金属矿为主;银水寺矿化集中区以寻找矽卡岩型铅锌多金属矿为主,力求突破岩浆热液型和次火山岩型铅锌钼多金属矿;洪冲矿化集中区以寻找岩浆热液型和斑岩型铅锌钼多金属矿为主;鲜花岭矿化集中区以寻找角砾岩型和浅成热液型铅锌铜多金属矿为主。

The Jinzhai area is located in the western part of the northern Huaiyang metallogenic belt in Anhui. Based on the re- gional geological structure setting and the distribution rule of lead-zinc molybdenum polymetallic deposits as known, this paper divided jinzhai area into four mineralized concentration areas and summarized the genetic types of the deposits,including porphyry type, mag- matic hydrothermal type, skarn type and breccia type. The typical ore deposits of various genetic types are also given. In the end, the potential of prospecting for the ore deposit in the area was analyzed and evaluated.It is considered that the concentration area of Yinsha mineralization is based on the search for porphyry type and magmatic hydrothermal type lead-zinc molybdenum polymetallic ores; the Yinshuisi mineralization concentration area is to search for the silicon kar-type lead-zinc polymetallic ore mainly, aiming at the break- through of the magmatic hydrothermal type and the secondary volcanic-type lead-zinc molybdenum polymetallic mine; the Hongchong concentration area is mainly used for searching for the hot liquid type and the porphyry type of copper molybdenum; the Xianhualing concentration area is mainly for the search for breccia and magmatic hydrothermal type lead and copper polymetallic ores.