内蒙古小南山式侵入岩体型铜矿的定量预测与评价  

Quantitative Prediction and Evaluation of Copper Mine of Xiaonanshan Intrusive Rock in Inner Mongolia

作　　者：徐彬[1,2] 陈建平[1,2] 于萍萍[1,2] 

机构地区：[1]中国地质大学(北京),北京100083 [2]北京市国土资源信息研究开发重点实验室,北京100083

出　　处：《有色金属工程》2016年第4期76-83,共8页Nonferrous Metals Engineering

基　　金：中国地质调查局项目(1212010733806)

摘　　要：对内蒙古小南山式侵入岩体型铜矿成矿地质条件和典型矿床特征进行研究,综合地质、物探、化探、遥感等信息,建立该区的找矿预测模型。根据找矿模型,优选出6个预测变量,在MRAS上采用特征分析法圈定18个最小预测区。利用地质体积法估算每个最小预测区的矿产资源量。依据最小分级原则,将圈定的18个最小预测区分为三级,A级2个,B级10个,C级6个,各级别面积分布合理;且已知矿床均在A级最小预测区内,说明预测区的优选分级是合理的。对各个最小预测区的矿产资源量作可信度估计,概率大于等于0.75的有10 139.84 t,大于等于0.5的有12 246.69 t,大于等于0.25的有14 353.54 t。A model of mineral exploration is established to compare metallogenic conditions in the Xiaonanshan intrusive rock of Inner Mongolia using the geological, geophysical, geochemical and remote sensing information. According to this model, 6 prediction variables are chosen and 18 minimum forecasting areas are delineated with characteristic analysis on MRAS system. The mineral resources of each minimum forecasting area can be estimated by using geological volume method. According to the minimum classification principle, forecasting areas of 2 A-order, 10 B-order and 6 C-order are recognized in this study. The areas of three levels are reasonable and the known ore deposits are in the minimum forecasting area of A, so this kind of classification principle is feasible in study area. Estimating the mineral resources of each minimum forecasting area＇ reliability, the mineral resources that probability of reliability greater than or equal to 0.75 is 10 139.84 t, the mineral resources that probability of reliability greater than or equal to 0.5 is 12 246.69 t and the mineral resources that probability of reliability greater than or equal to 0. 25 is 14 353.54 t.

关 键 词：定量预测与评价 特征分析法 地质体积法 找矿靶区 

分 类 号：P617[天文地球—矿床学]