“三位一体”找矿预测理论在山东省七宝山矿集区的应用

Application of "Three in One" Prospecting Prediction Theory in WulianJuxian Ore Concentration Area in Shandong Province

摘要:

依据勘查区找矿预测理论方法，对山东省七宝山矿集区进行找矿预测研究工作，通过总结成矿地质体、成矿构造与成矿结构面、成矿作用特征标志，认为矿集区内成矿地质体为次火山岩体，成矿构造为隐爆角砾岩筒、原生断裂、次生断裂，成矿结构面为隐爆角砾岩筒、断裂及层凝灰岩与次火山岩岩性界面；成矿作用特征标志：金线头金铜矿为隐爆角砾岩+镜铁矿+硅化+黄铁矿，七宝山铜及多金属矿为构造蚀变岩+锰矿化+铁帽。建立七宝山地区陆相火山热液型矿床综合找矿预测模型，圈定七宝山找矿靶区，通过查证，发现含矿隐爆角砾岩带一条，估算求得铜金属量1.47万t；铅金属量1.39万t。本次“三位一体”研究成果，对矿集区开展找矿预测工作具有较强的指导意义。

Abstract:

Based on the theory and method of prospecting prediction in exploration area, prospecting and prediction of Wulian Juxian ore concentration area in Shandong province has been carried out. On the basis of summarizing the ore-forming geological body, metallogenic structure and structural plane, and metallogenic characteristics, it is considered that the ore-forming geological body in the ore concentration area is subvolcanic rock mass, the metallogenic structure is cryptoexplosive breccia tube, lithologic interface between faults, tuff and subvolcanic rocks. Characteristics of mineralization is as follows: Jinxiantou gold copper deposit is cryptoexplosive breccia + specularite + silicification + pyrite, and Qibaoshan copper and polymetallic deposit is tectonic altered rock + manganese mineralization + gossan. The comprehensive prospecting prediction model of continental volcanic hydrothermal deposit in Qibaoshan area is established, and the prospecting target area of Qibaoshan is delineated. Through verification, one ore bearing cryptoexplosive breccia belt is found, and the estimated copper metal amount is 14700t and the lead metal amount is 13900t. The "Three in One" research results have a strong guiding significance for ore prospecting and prediction in ore concentrated areas.