矿体三维可视化建模技术在成矿模式分析中的应用

Application of three-dimensional visualization modeling technology of ore bodies in metallogenic mode analysis

铜是我国国民经济建设重要的战略性金属矿产资源之一,其国外进口依存度高,因此铜矿的勘查和资源评估工作具有重要的意义。基于野外地质工作中所采集的地质勘探剖面及钻孔数据,建立了滇西某铜矿区的三维可视化地质矿产模型,并基于该模型估算了资源储量。计算结果表明:全区矿石资源量为4893.4万t,铜储量为54.3万t。通过对比分析证实新地质矿体三维建模系统建立的模型及资源估算具有较高的可信度,其多样化的分析板块及动态更新功能具有较为广泛的应用性,能够运用于铜矿后续的钻探工程及资源量评估中。结合区域构造和矿床地质资料,进一步分析了铜矿的成矿模式,即后期火山气液充填交代富集改造为滇西某铜矿成矿的主要矿质来源,构造运动对其控制作用明显,主要体现在多旋回构造运动中形成的岩相古地理条件及后期断裂活动对容矿空间的改造。研究成果为进一步的勘查工作奠定了基础,能够更好地指导找矿工作,对相关类型多金属矿产的勘查和开采等实践应用亦具有借鉴意义。

[Objective]Copper is an important strategic metal resource for national economic and social development.Therefore,the exploration and resource assessment of copper mines are of great significance.[Methods]Based on collected geological profiles and drilling data,this study constructed a three-dimensional geological model for a copper ore deposit in western Yunnan,which was applied to estimate the resource reserve in the mining area.[Results]The ore resource is estimated to be 48.93 million tons,including 0.543 million tons of copper.Through comparative analysis,the model and resource estimation established by our newly proposed three-dimensional geological modelling system shows high credibility,in which multiple analysis modules and dynamic update function have a wide range of applications and it can be used for future drilling engineering and resources estimation.[Conclusion]This study provides the basis for further exploration work in this region,and it can also be applied to the exploration and mining of related polymetallic deposits.