普朗铜矿是位于三江成矿带南段的超大型铜多金属矿床,对该矿首采区、矿区东部、矿区北部及矿区外围北部四个矿段的矿体特征、矿化特征、围岩蚀变等地质信息进行了对比分析.结果表明,首采区深部及矿区北段产出矿体均属于典型的斑岩型铜矿,矿体受蚀变控制作用明显,矿(化)体常产于钾化、硅化带、绢英岩化及其叠加部位,矿化强度与蚀变强度呈正相关;矿区外围东部大脉状矿体及矿区外围北部铅锌矿(化)体属热液脉性矿体,主要受构造控制,多产于近东西向的节理裂隙中.在对各矿段找矿标志的总结基础上指出首采区的近地表、构造交汇部位及矿区北侧深部均具有较好的找矿前景.
Pulang copper deposit is a superlarge copper polymetallic deposit in the southern segment of the Sanjiang metallogenic belt.The ore-body characteristics,mineralization characteristics and the wall-rock alteration of the four ore-sections in first mining area,eastern segment of mining area,northern segment of mining area and northern segment of peripheral mining area were discussed.The results show that:the ore-bodies which occurred in first mining area and the northern segment beong to the porphyry copper deposit,and are mainly controlled by alteration.The porphyry-type orebody is mainly hosted in potassic alteraion,silicification belt,and sericite-quartz alteration and their superposition area,and the mineralization has positively correlated with strengh of alteration.The vein ore and the lead-zinc orebody occurred in the eastern/northern segment of periphreal mining area belongs to hydrothermal vein-type ore.The vein orebody is mainly controlled by fault structure which is hosted in the nearly east-westwad joint fissure.This paper reports that the near-surface of first mining area,structure-intersection part and the deep-part of northern segment are important prospective area of locating the blind ore body,by the conclusion of prospecting criteria.
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