信息不对称条件下的矿产资源三维预测评价——以陕西小秦岭金矿田为例  

Three-dimensional Prediction and Evaluation of Mineral Resources under the Condition of Asymmetric Information: a Case Study of Xiaoqinling Gold Ore-field in Shaanxi Province

作　　者：胡彬[1,2] 陈建平[1,2] 向杰[1,2] 尹晓云[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开发研究重点实验室,北京100083

出　　处：《金属矿山》2017年第8期127-137,共11页Metal Mine

基　　金：国家重点基础研究发展计划("973"计划)项目(编号:2012CB416605);国家重点研发计划项目(编号:2017YFC0601502)

摘　　要：三维实体建模是三维矿产定量预测的前提,三维模型的准确性、合理性是三维定量预测的基本要求,而信息不对称问题对于三维实体建模精度及后续预测评价带来了极大的不确定性。以陕西小秦岭金矿田为例,以地质-地球物理综合解译剖面为依据,采用Surpac面元建模法降低三维实体模型的不确定性。在综合分析研究区成矿条件、成矿规律的基础上,建立了地质找矿模型,提取了成矿有利信息,圈定了13个成矿有利靶区,并采用找矿概率法估算出了Au资源量914.6 t。研究表明:虽然信息不对称问题普遍存在,但基于地质-地球物理综合解译剖面,通过面元建模法可较大程度地降低不确定性,有助于对区内深部矿产资源进行高精度三维预测评价。Three-dimensional solid modeling is a prerequisite for quantitative prediction of three-dimensional mineral resources,and the accuracy and rationality of three-dimensional model are the basic requirements of three-dimensional quantitative prediction. However,the information asymmetry problem brings great uncertainty to the three-dimensional solid modeling accuracy and the follow-up prediction evaluation of mineral resources. Taking the Xiaoqinling gold ore-filed in Shananxi Province as the study example,based on the geological-geophysical comprehensive interpretation profiles,the uncertainty of the three-dimensional solid model is reduced by using Surpac software surface element modeling method. Based on analyzing the metallogenic geological conditions and metallogenic regularities of the study area,the geological prospecting model is established,and the metallogenic favorable information is extracted,13 metallogenic target areas are delineated,besides that,about 914. 6 t Au resources are calculated by adopting prospecting probability method. The study results show that although information asymmetry problems are existed generally,the uncertainly of three-dimensional solid model can be reduced effectively by using surface element modeling method based on geological-geophysical comprehensive interpretation profiles,which is help for realizing the three-dimensional prediction and evaluation with high precise of the mineral resources in the study area.

关 键 词：金矿 信息不对称 地质-地球物理综合剖面 面元建模法 成矿靶区 找矿概率法 

分 类 号：P624.6[天文地球—地质矿产勘探]