数字矿床模型及其应用——以新疆阿勒泰地区可可托海3号伟晶岩脉稀有金属隐伏矿预测为例  

Digital ore deposit model and its application:a case study of the prognosis of the Koktokay No3 pegmatite dike concealed rare metal deposit in Altay area of Xinjiang

作　　者：陈建平[1] 陈勇[1] 朱鹏飞[1] 王丽梅[1] 尚北川[1] 赵洁[1] 

机构地区：[1]中国地质大学(北京)国土资源与高新技术研究中心/北京市国土资源信息开发研究重点实验室,北京100083

出　　处：《地质通报》2011年第5期630-641,共12页Geological Bulletin of China

基　　金：全国危机矿山接替资源勘查项目<新疆富蕴县可可托海矿山资源预测与评价>(编号:200665102)

摘　　要：通过构建数字矿床模型,实现了对可可托海3号伟晶岩脉稀有金属矿开发现状及潜在经济价值的评估。数字矿床模型分为2个部分:地质体三维模型和钻孔三维品位模型,前者以地质剖面、地表模型、开采线等数据为基础,以Micromine软件为平台,利用三维可视化技术实现、再现了矿床的空间形态和内部结构,后者以钻孔测试数据为基础,利用地质统计学方法,对模型区范围内的成矿元素品位进行了三维插值,展示了成矿元素异常在空间上的分布。2种模型相互结合,对矿山开采现状进行了评估,对剩余矿体的位置进行了限定。最后,结合数字矿床模型,利用一种"等腰三角形"方法对矿床潜在资源量进行了估算。研究结果显示,虽然矿床"钟形体"部位已开采殆尽,但在钟形体南侧缓倾斜部位还存在较大规模具有经济价值的矿体,氧化铍潜在资源量在822.69～1992.41t之间。Through the building of a digital ore deposit model,the authors evaluated the present exploration situation and potential economic value of the rare mental mine in Koktokay No.3 vein of Xinjiang.The digital ore deposit model consists of two parts,namely 3D model of geological bodies and 3D grade model of borehole data.The former part,based on geological profiles,terrain model and prospecting lines,vividly represents the spatial pattern and inner structure of the ore deposit by using the software Micromine and the 3D visualization technique.The latter one,based on drilling test data,shows the spatial distribution of anomalous metallogenetic elements after 3D interpolation of elemental grades in the model scope by using geological statistic method.With the combination of the two models,the authors assessed present exploitation status of the mine and delineated the remnant ore bodies.The ＂Isosceles Triangle＂ method is proposed in this paper for estimating the potential ore recourses.Studies shows that,although the ＂bell-shaped＂ ore bodies have been fully exploited,there still exist exploitable large-size ore bodies with high economic value in the gently-inclined southern part of the ＂bell-shaped body＂,and the potential resources of beryllium oxides are approximately between 822.69 and 1992.41t.

关 键 词：新疆可可托海3号脉 三维 数字矿床模型 

分 类 号：P628[天文地球—地质矿产勘探] P618.6[天文地球—地质学]