江西乐安邹家山—居隆庵地区三维地质模型的构建

Establishment of a three-dimensional geological model of the Zoujiashan-Julong'an area in Le'an of Jiangxi Province

邹家山—居隆庵地区位于相山火山岩盆地铀矿田的西部,是中国典型的火山岩型铀矿床。随着铀矿床勘探方法及技术的不断提高,运用现代计算技术对该铀矿床的地质成矿过程及已知矿体的地下三维空间结构进行三维模型建设,有利于进一步开展深部找矿工作。收集并分析了研究区的可控源音频大地电磁测深、矿体钻探等获得的多元地质-地球物理数据,运用GOCAD及Map GIS、Coredraw、Auto CAD等软件,利用钻孔-CSAMT勘探线-钻孔联孔剖面构建区内断裂构造及地层界面,并按照地质体之间的新老关系构建了邹家山—居隆庵地区三维地质模型。模型中不同地质界面平滑美观,清晰地表达了目标地质体的空间几何形态以及地层相互之间的接触关系,三维地质模型在直观性、可视性以及三维计算分析方面体现了较大的优势。

The Zoujiashan-Julong＇an area, located in the west of the Xiangshan volcanic basin in Le＇an of Jiangxi Province, contains typical volcanic uranium deposits in China. With the constant improvement of uranium deposit exploration methods and technology, three-dimensional modeling of metallogenic process and orebody structure is helpful for deep prospecting work. This study collected and analyzed the multivariate geological-geophysical data obtained by CSAMT measurements and drilling, and constructed the fault struc- tures and lithological interface with drilling- CSAMT- drilling profiles using GOCAD, MapGIS, Coredraw and Auto CAD software. A three-dimensional geological model of the Zoujiashan-Julong＇an area is built according to the young and old relationship between geo- logical bodies. The established model has smooth and beautiful geological interface, and can clearly express the spatial geometry of tar- geted geologica2 bodies and stratigraphic contact relationship. It is shown that three-dimensional geological modeling has a great advan- tage in direct-viewing, visibility and three-dimensional computational analysis.