云南个旧矿区某隐伏矿床大比例尺三维预测  

Large-scale 3D metailogenic prediction of concealed orebody in Gejiu, Yunnan province

作　　者：陈建平[1] 尚北川[1] 吕鹏[1] 赵洁[1] 胡青[1] 

机构地区：[1]中国地质大学国土资源信息开发研究重点实验室,北京100083

出　　处：《地质科学》2009年第1期324-337,共14页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：北京市教育委员会共建项目建设计划（JD104910556）的部分成果.

摘　　要：使用钻孔数据提取云南个旧某矿区的元素异常分布，应用三维地质建模软件对之进行地下隐伏矿体的三维模拟预测。将三维可视化技术与找矿信息量法结合提出＂立方体预测模型＂找矿方法，选取5个统计分析变量（地层、断裂、花岗岩、Sn异常及Pb异常）的地质标志进行了找矿信息量计算，进而估算其金属资源储量。确定地层和断裂是研究区主要的控矿因素，以断裂周围150m区域，个旧组卡房段的第五和第六亚段地层为远景预测区，预测氧化矿体远景区的单元数约占总单元数的四分之一。这表明＂立方体预测模型＂法在该区隐伏矿体定位、定量和定概率预测方面的有效性，实现了传统的二维找矿向三维找矿的新突破。visualization technology and the traditional quantitative predicting method. Five statistical variates, namely, the strata, faults, granites, anomalies of Sn and Pb, were selected to be geological marks, and we established the prospective zone and tested project zones of Sn and Pb,calculated the ore-eontaining probabilities and the quantities of the metal resource. The key controlling factors in the studied area should be strata and faults, so we thought that the 5th and 6th Submembers, Kafang Member of Middle Triassic Gejiu Formation, and the region within 150 m of the both sides of fault should be potential metallurgic regions. This application showed the validity of ＂the cubic predicting model＂ method in orebody＇s prediction for determing quantity,position and probability. Fourthermore, this study made a great breakthrough of changing from traditional 2D to the 3D prospecting.

关 键 词：三维地质建模 立方体预测模型 成矿预测 隐伏Pb-Sn矿体 云南个旧 

分 类 号：P618[天文地球—矿床学]