内蒙古额济纳旗红石山金矿三维成矿条件分析与成矿预测  

Three-dimensional analysis of metallogenic conditions and their metallogenic prediction of the Hongshishan gold mine in Ejin Banner of Inner Mongolia

作　　者：胡彬[1,2] 陈建平[1,2] 安文通 向杰[1,2] 田夏一 王文杰[1,2] 赖自力[1,2] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,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：《地质学刊》2016年第3期486-492,共7页Journal of Geology

基　　金：国家重点基础研究发展计划("973"计划)项目"前寒武纪优势矿种成矿系列与找矿预测"(2012CB416605)

摘　　要：分析了内蒙古额济纳旗红石山金矿床地质特征和控矿地质条件,总结了研究区成矿规律及找矿标志在深部的变化规律,建立了该区域的找矿地质模型,利用Surpac软件对区内地层、断裂构造、岩体、已知矿体、物化探异常等成矿预测因子进行了三维实体建模;采用立方体预测模型法对三维实体模型进行空间分割,并依据建立的找矿地质模型,给每一个立方体单元块赋相应属性值,建立数字找矿模型;进而对研究区地质、地球物理、地球化学等9个预测变量进行三维成矿有利条件分析与提取,采用三维信息法计算并统计各预测变量所包含的信息量,确定成矿有利组合的空间部位,并结合研究区内实际地质情况、已有见矿工程分布等因素圈定了3处找矿靶区;最后采用体积估计法计算得到3处找矿靶区的总资源量为4.67 t。This work analyzed the geological characteristics and ore-controlling conditions of the Hongshishan mine in Ejin Banner of Inner Mongolia, and summarized the variations of metallogenic rules and prospecting indicators in the deep mine. Based on this, we established a geological prospecting model and conducted three-dimensional solid model of strata, faults, rock mass, known ore bodies, geophysical and geochemical anomalies using Surpac software. We utilized the method of cubic forecasting modelling to conduct spatial division, and assigned corresponding attribute values for each cubic unit to build a digital prospecting model using the established prospecting model. Then, we carried out three-dimensional analysis and extracted information of favorable ore-forming conditions including nine predictive variables of geology, geophysical and geochemical factors, and used the three-dimensional information method to calculate and add up the information of each predictor, which can determine the favorable ore-forming space. In combination with the geological fact and ore-intersected engineering, three prospecting targets were delineated, whose total resource amount was estimated to be 4. 67 tons by the volume estimation method. The research results have certain significance for the follow-up prospecting work in this region,

关 键 词：立方体预测 三维成矿分析 三维信息量法 SURPAC软件 靶区圈定 红石山金矿床 内蒙古额济纳旗 

分 类 号：P612[天文地球—矿床学] P618.51[天文地球—地质学]