摘要
以内蒙古某钼铜矿为研究对象,采用几何建模法构建了成矿相关地质体的三维形态模型,通过变异函数分析研究了矿化元素的空间变异性,在此基础上应用Kriging插值和空间分析方法构建和解析了成矿元素的三维品位分布模型。模拟结果表明钼和铜品位数据具有相似的空间变异模式,但铜矿化的均匀程度和空间相关性都高于钼矿化。钼铜矿化具有丛聚性特征,富集部位则有所差异,富铜矿化主要位于隐爆角砾岩的中心,大部分深部钼矿体则围绕富铜矿化分布,接近隐爆角砾岩筒的边界,两者空间分布的关联和差异反映了钼铜矿化具有相似的成矿机制和控矿因素组合,但在成矿演化顺序和空间产出上有所差异。以上模拟结果可为研究区深部隐伏矿体的勘探和成矿机制的研究提供模型依据和数据参考。
Taking a Mo-Cu deposit in the Inner Mongolia as the research object,the 3D morphological models of ore-related geological bodies were generated by geometrical modeling,and the spatial variability of mineralized elements was studied by variogram analysis based on which the 3D distribution models of ore-forming elements were constructed and analyzed.The modeling results indicate that the Mo and Cu grade data have similar variability pattern,but the homogeneity and correlation of Cu mineralization are higher than those of Mo mineralization.The Mo and Cu mineralization are clustered with different enriched locations.The high-grade Cu mineralization is located in the core of cryptoexplosive breccia,whereas most of deep Mo orebodies are distributed around the high-grade Cu mineralization and close to the boundary of the pipes of cryptoexplosive breccia.The correlation and difference of spatial distribution of Mo and Cu mineralization imply that they have similar ore-forming mechanism and combination of ore-controlling factors,but they differ in the ore-forming evolution order and spatial localization. The above modeling results can provide significant model evidences and data references for exploration of deep concealed orebodies and study of ore-forming mechanism.
作者
达朝元
周凯
徐文静
孙涛
郭永强
张旭康
DA Chaoyuan;ZHOU Kai;XU Wenjing;SUN Tao;GUO Yongqiang;ZHANG Xukang(No.243 Geological Brigade of China National Nuclear Corporation,Chifeng 024006,Inner Mongolia,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《江西理工大学学报》
2021年第4期59-66,共8页
Journal of Jiangxi University of Science and Technology
关键词
三维地质模拟
空间变异性
深部资源勘查
钼铜矿化
3D geological modeling
spatial variability
exploration of deep resources
Mo-Cu mineralization
