高密度电法在侵入岩发育地区的应用实例及分析

Application and Analysis of High Density Electrical Method in the Area of Intrusive Rock Development

随着城镇化建设速度加快,地质条件复杂的山区边缘地带的建设也迅速展开。特别是侵入岩发育地区,地质情况变化较复杂。摸清地下地质条件是保障建设安全的有效手段。实例的应用地区位于河北省武安市的西部,该地区属于太行山东麓,区内铁矿、煤矿分布较多,侵入岩类型发育丰富。论文通过对高密度电法数据的整理分析,成图解释,有效地区分出了侵入岩界面、形态和分布,给出了该地区灰岩和侵入岩在物探电阻率上的差异,取得了一定的实践效果,并为后续同类物探资料的解释提供了实例。

With the rapid development of urbanization in China,the construction of mountainous marginal areas with complex geological conditions is also rapidly developing. Especially in the areas where intrusive rocks are developed,the change of geological conditions is complex. Finding out the underground geological conditions is an effective means to ensure the safety of construction.The application area of this case is located in the west of Wuan city,Hebei province,which belongs to the eastern foot of Taihang and has complex geological conditions. There are many iron ores and coal mines in the area,and the intrusive rock types are rich.In this paper,the interface,shape and distribution of intrusive rocks are effectively distinguished through the sorting and analysis of high-density electrical data and mapping interpretation. The difference of geophysical resistivity between limestone and intrusive rock in this area is given. Some practical results have been obtained,and an example has been provided for the interpretation of similar geophysical data in the future.