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基金项目:国家自然科学基金面上项目“面向隐伏矿体三维预测的成矿空间复原方法研究”(41772349)
作者单位
赵其辉,毛先成,陈进 有色金属成矿预测与地质环境监测教育部重点实验室 
摘要:
      地壳中的矿产分布受一定的地质构造控制,正确认识区域构造与矿床构造特征,有助于对矿产资源进行科学预测与评价。在地质构造分析中,赤平投影是经常使用的分析方法,能定量计算节理的优势方位,直观、形象地展示节理的几何形态。运用构造分析理论,系统介绍通过吴氏网绘制节理赤平投影弧、通过施氏网计算节理优势方位的方法。使用C++语言实现了绘制赤平投影的程序,运用该程序处理胶西北多个金矿床的地质体产状数据,计算得到的优势方位走向符合实际区域地质构造。与Dips软件的处理结果进行比较,优势方位的误差在±2°以内,符合实际精度需求,验证了程序的正确性和实用性。
关键词:构造分析  极射赤平投影  优势方位  金矿矿集区  胶西北
Abstract:
      The distribution of minerals in the earth′s crust is controlled by certain geological structures, and a correct understanding of the tectonic features of regions and deposits can be helpful to make scientific evaluation and prediction for mineral resources. In the analysis of geological structures, the stereographic projection is a frequently used analysis method, which can quantitatively calculate the dominant orientation of the joints, and can visually and vividly show the geometry of the joints. Based on structural analysis, this paper systematically introduced the method of plotting the joints′ stereographic projection by means of Wulff net and calculating the dominant orientation of joints by means of Schmidt net. The program for plotting the stereographic projection was implemented in C++ to process the geological body production data of several gold deposits in northwest Jiaodong Peninsula. The calculated tendency of the dominant orientation is in line with the actual regional geological structure, and the error of the dominant orientation is within ±2° compared with the results processed by Dips software, which meets the actual accuracy requirements, verifying the practicality and correctness of the program.
Keywords:structural analysis  polar stereographic projection  dominant orientation  gold ore concentration area  northwestern Jiaodong Peninsula
赵其辉,毛先成,陈进.面向构造分析的赤平投影的计算机实现与应用[J].地质学刊,2022,46(2):165-172