江西九江城门山铜矿三维地质地球化学特征与成矿预测

3D geological and geochemical features and metallogenic prognosis of Chengmenshan copper deposit,Jiujiang,Jiangxi,China

利用城门山铜矿326个钻孔的原始资料信息,通过MAPGIS-TDE三维可视化系统建立三维地质、地球化学模型,结合数学模型进行深部成矿预测。结果表明,城门山铜矿深部主体岩体是晚期的石英斑岩,早期的花岗闪长斑岩是石英斑岩的大"捕虏体";赋存于上泥盆统五通组与中石炭统黄龙组假整合面和裂隙带中的似层状块状硫化物矿体往深部产状变缓,有往向斜核部发育的趋势;城门山铜矿深部应以寻找斑岩型钼矿和似层状含铜黄铁矿为主要找矿方向,第二空间(-500～-1000m)约有50×104t铜资源量(Cu≥0.3%))和20×104t钼资源量(Mo≥0.04%)。建议在矿区0-102勘探线剖面上实施深部钻孔工程。

By using of the original data of 326 drill holes of Chengmenshan copper deposit, we can build 3D geological and geochemical model through 3D visualization system MAPGIS-TDE, and combining mathematical model for deep mineralization forecast. The results showed that the main body in the deep of Chengmenshan copper deposit is later quartz porphyry, and early granodiorite porphyry is a large ＂xenoliths＂ in the quartz porphyry. The occurrence of stratiform massive sulphide ore body existed in fracture zone and unconformity surface between Wutong Formation and Huanglong Formation is slowing down in the deep area, and there is an increasing trend near the core of syncline. We＇d look for porphyry molybdenum and stratiform copper-pyrite as the major direction of exploration in the deep area of Chengmenshan copper deposit. There are about 500000 tons of copper resources （Cu ≥ 0.3%） and 200000 tons of molybdenum resource （Mo ≥ 0.04%） in the secondary space （-500 ～-1000m）, and implementation of the deep drilling project is proposed in the No.0-102 exploration line profile within the mining area.