昆明市梁王山地区节理及断层构造分析

Analysis on joint and fault structure of Liangwang mountain area in Kunming

通过对滇池东部梁王山地区杨柳冲新村至饮马池矿段路线野外实地调查研究,实测并收集整理F1至F5断层间节理83条,运用极点等密度图、节理倾向(走向)玫瑰花图、倾角分布直方图等统计方法对研究区节理分布特点以及空间产出形态进行了统计分析。从裂隙极点等密度图及走向图可以看出,区内存在四个方向的节理组,第一组:10°～30°∠18°～63°;第二组:80°～120°∠45°～75°;第三组:120°～175°∠30°～55°;第四组:175°～230°∠40°～80°。根据节理的统计结果,第三组节理最为发育,约占44%,第一组、第二组次之,各占18%,第四组最少,约占总节理数的13%。从节理空间分布结果可以看出,该区节理的成因与区域性北东向深大断裂的空间展布关系密切。通过该地区节理及断层构造研究,为分析该地区构造演化及矿体空间产出变化提供参考。

According to the field investigation of Yangliuchong new village to Yinmachi section in Liangwang mountain area,83 joints were measured and collected from no.1fault to no.5fault.The statistical analysis of the characteristics of the joint distribution was carried out by using the statistical methods such as the polar point density map,the trend rose map and the inclination distribution histogram.The density and strike diagram of the joint pole indicates that there are four joints set in the area.In the first group,the trend is 10to 30degrees and dip is 18°to 63°;in second group,the trend is 80-120°and dip is 45-75°;in third group,the trend is 120-175°and dip is 30 -55°;in fourth group,the trend is 175-230°and dip is 40-80°.According to the statistical results of joints,the joints of third group are most developed,accounting for 44%,and the first group and the second group are senior, accounting for 18%respectively,and the fourth group is the least,accounting for about 13%.From the results of joint spatial distribution,it can be concluded that the genesis of joints in this area is closely related to the spatial distribution of the regional north-east trending faults.Through the study of joints and fault tectonics in this area,it provides reference for the analysis of tectonic evolution and the output change of ore body space in this area.