重点成矿带大中比例尺三维地质建模方法与实践  

Method and Practice of 3D Geological Modeling at Key Metallogenic Belt with Large and Medium Scale

作　　者：陈建平[1,2] 于淼[1,2] 于萍萍[1,2] 尚北川[1,2] 郑啸[1,2] 王丽梅[1,2] 

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

出　　处：《地质学报》2014年第6期1187-1195,共9页Acta Geologica Sinica

基　　金：中国地质调查局地质调查工作项目(编号:12120113091100);国土资源部公益性行业科研专项(编号:201011002)资助的成果

摘　　要：随着浅部矿藏的日益减少,地质找矿难度增大且找矿效果日益降低。面对新形势和新需求,本文基于3S技术、数据库技术、三维可视化技术和虚拟现实技术提出了一套系统的重点成矿带大中比例尺三维地质建模及集成表达的技术方法。以多年积累的二维地质调查成果与经验为基础,以地质找矿理论为指导,依托三维可视化技术,综合地质、地球物理、地球化学、遥感等多元信息,进行三维地质建模与推断,建立综合的能真实反映深部的三维地质模型,并实现二维与三维地质信息的集成表达与综合研究,揭示地下一定深度的各种地质体和地质现象。通过三维地质建模,建立准确形象的三维地质模型,表达各种地质体的三维空间展布及相互关系,从而更有效地进行地质研究和找矿预测。该方案已在陕西潼关金矿、云南个旧锡矿、西藏玉龙斑岩铜矿、华北克拉通沉积变质型铁矿床等不同矿床类型不同矿种进行了实践并取得了很好的成果,也为我国即将开展的三维地质填图工作提供可借鉴的方案。With shallow ore deposit reducing day by day, it is more difficult for geological prospecting and the effect of geological prospecting is increasingly lower. Faced with the above problems, this paper puts forward a set of technical methods of 3D geological modeling with large and medium scale at key metallogenic belt, which relying on 3S technology, database technology, 3D visualization technology and virtual reality technology. With many years ＇ two-dimensional geological survey results and experiences, based on geological prospecting theory, relying on the three-dimensional visualization technology, this paper integrated multi-information as geological, geophysical, geochemical and remote sensing information, carried out three-dimensional geological modeling and inference, established comprehensive three-dimensional geological model which can truly reflect the deep geological condition and achieved the integrated expression and comprehensive study of the 2D and 3D geological information, which revealed various geologic body and geological phenomena certain depth of underground. By three-dimensional geological modeling, accurate and imaginal 3D geological models can be established, and the 3D spatial distribution and the relationship between the various geological bodies can be expressed, so as to carry out geological research and prospecting prediction more effectively. The methods had been put into practice in Tongguan district in Shanxi province, Gejiu district in Yunnan provice, Yulong porphyry copper deposit in Tibet （Xizang） and North China craton sedimentary-metamorphic iron deposit, and a very good achievement was obtained which provided a referential scheme for upcoming 3D geological mapping in China.

关 键 词：三维地质建模 重点成矿带 集成方案 陕西潼关 云南个旧 

分 类 号：P628[天文地球—地质矿产勘探]