论文部分内容阅读
利用高精度的浅层地震勘探手段,探测出北京市立水桥附近的黄庄-高丽营隐伏断裂,并进行了地质解释。结果表明北京市立水桥附近区域的浅部速度模型为4层结构。第1层至第2层的介质深度从0～150m,P波速度从800～2000m/s,介质为第四纪或古-新近纪覆盖层;第3层至第4层的介质深度为130～300m,P波速度在2000～2500m/s以上,推测为泥岩、砂岩类的基岩区。黄庄-高丽营隐伏活断裂其浅部由东西2条近似平行、相距1300m、走向N23°E、倾向SE的断裂所组成,西断裂F2倾角22°,东断裂F1倾角67°,在634m深度归结成单条断层,构成分叉状结构;断层上盘埋深101m,下盘埋深109m,断距为8m,为断错T2,T3地层界面、带走滑分量的正断层型。
By means of high-precision shallow seismic exploration, the hidden faults of Huangzhuang-Gaoliying near Peizui Bridge in Beijing were detected and interpreted geologically. The results show that the shallow velocity model in the vicinity of Lishuiqiao in Beijing is a 4-layer structure. The media depth from layer 1 to layer 2 is from 0 to 150 m, the P wave velocity is from 800 to 2000 m / s, and the media is Quaternary or Paleogene overburden; the media depth from layer 3 to 4 is 130 ~ 300m, the P wave velocity is above 2000 ~ 2500m / s, which is presumed to be bedrock zone of mudstone and sandstone. The shallow buried faults of Huangzhuang-Gaoliying are composed of two east-west parallel lines, with a distance of 1300m and a strike of N23 ° E, with a tendency of SE. The dip of F2 of west fault is 22 ° and the dip of east fault is 67 °. At a depth of 634m, The faults are divided into a single fault and a bifurcated structure. The upper fault has a depth of 101 m, a lower fault is 109 m and a fault is 8 m. It is a normal fault type with a slip component at the fault T2 and T3 stratigraphic interfaces.