三维建模技术在湖南花垣铅锌找矿中的应用

湖南花垣铅锌矿床位于上扬子地块东南缘,鄂湘黔深大断裂北西侧,其地质特征和规模类似于美国的MVT型铅锌矿床.区内控矿要素主要为地层、岩相和构造,主要赋矿地层为寒武系下统清虚洞组中段的藻礁灰岩地层,控矿岩相为台地边缘浅滩亚相,主要控矿构造为花垣—张家界大断裂.通过建立矿区和区域2个尺度的三维模型,综合分析了研究区的地质特点及成矿规律,为进一步探测隐伏矿床提供了基础.

3D modeling in Huayuan Pb Zn exploration in Hunan

The study area was located in the southeastern margin of upper Yangtze block and northwestern side of Hubei-Hunan- Guizhou deep fault. The geological characteristics and scale of the deposit were just like MVT-type Pb-Zn deposit in the United States of America. The ore bodies were mainly controlled by multi-factors, including primary porosity of rocks and structures in ore-bearing strata. The occurrence of Pb-Zn deposit in study area was controlled by tectonic, lithologic and algae reef factors and ore bodies were primarily occurred in middle submembers of Qingxudong Formation of lower Cambrian series. In order to study the evolution and metallogenic regularity of MVT lead-zinc deposits in the west of Hunan Province, two sets of 3D models were established by Minexplorer software： 3D model for typical ore deposit and 3D model on regional scale. It was effective to observe occurrences and distribution characteristics with 3D geological models, and to provide the basis for further exploration of the concealed deposits.