动态构建福建紫金山铜金矿矿体模型  

Dynamical Modeling of Zijinshan Copper-Gold Deposit in Fujian Province

作　　者：李章林[1] 张夏林[1] 翁正平[1] 杨成杰[1] 孙卡[1] 

机构地区：[1]中国地质大学国土资源信息系统研究所,武汉430074

出　　处：《吉林大学学报（地球科学版）》2011年第3期945-952,共8页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学青年基金项目(40802082/D0215);国家'863'计划项目(2008AA121602);'数字紫金'项目

摘　　要：为了将不同边界品位情况下矿体的形态及由边界品位变化引起的矿体形态变化程度在计算机中动态、实时地展现,同时也为了解矿体在不同工业指标条件下的空间形态,进行了矿体动态建模方法研究。采用了一种新的、基于矿体属性模型向其几何结构模型转化的方法——克里格块体法。通过该方法,基于指示克里格估值技术,使用块体模型+实体模型的三维数据模型结构,动态地构建出了福建上杭紫金山铜金矿矿体在不同边界品位条件下、信息充分、完备且具高可信度的矿体模型,达到了使建模结果能够真正服务于矿山勘探和生产实践的效果。该方法具有一定的可扩展和易推广的性质,能够完成大多数类似矿山及类似地质体的动态建模过程。The Zijinshan gold mine,in Shanghang Country,Fujian Province in China,is famous mainly for its very low cutoff grade adopted in exploitation compared to exploration.This research aims at dynamical expressing both the geological structure and properties of the gold mine and its underlying copper mine,under different conditions of deposit industry index mainly consists of grade parameters.According to the idea of transforming the property model to geometric structural model,a new 3D geosciences modeling method,named kriging block（KB） is proposed.By this means,along with applying indicator kriging for the estimation of the grade values and a mixed 3D model（solid＋block）,a series of typical 3D deposit models of the Zijinshan copper-gold mine with different cutoff grades were successfully built.Because of the dynamical characters of the adopted modeling method,the results can serve mine exploitation and production.In addition,this method is extensible for other similar deposits or other geological bodies.

关 键 词：矿体建模 地质统计学 光滑效应 金矿 指示克里格法 

分 类 号：P628.3[天文地球—地质矿产勘探] TP391[天文地球—地质学]