论文部分内容阅读
1936年灵山6?级地震是迄今为止有记载以来在华南陆地发生的最大地震,其产生的地震地表破裂带尚没有系统的研究。通过野外系统地质地貌调查及位错测量,发现1936年灵山6?级地震的地表破裂带主要由东西2支组成,平面上呈斜列式展布于灵山断裂北段,全长约12.5km,走向N55°~60°E。西支在高塘—夏塘—六蒙一带断续出露,长9.4km,水平位错0.54~2.9m,垂直位错0.23~1.02m;东支出露在蕉根坪—合口一带,长3.1km,水平位错0.36~1.3m,垂直位错0.15~0.57m。最大水平位移量2.9m,最大垂直位移量1.02m。地表破裂类型主要有地震断层、地震陡坎、地震裂缝、地震崩积楔、地震滑坡、砂土液化等。
The L6.2 earthquake of 1936 is the largest earthquakes onshore in South China recorded so far, and no systematic study on the seismic rupture zone has been made. Through the investigation of geology and geomorphology and dislocation measurements in the field, it was found that the surface rupture zone of the L6.2 earthquake in 1936 consisted of two major components, east-west two-component, and obliquely distributed in the northern part of the Lingshan fault on the plane with a total length of about 12.5 km. Towards N55 ° ~ 60 ° E. The western branch is intermittently exposed in the areas of Gaotang-Xiangtang-Liu-Meng, with a length of 9.4km, horizontal dislocations of 0.54-2.9m and vertical dislocations of 0.23-1.02m. The eastern branch is exposed in the Jiaoganping- km, horizontal dislocation 0.36 ~ 1.3m, vertical dislocation 0.15 ~ 0.57m. The maximum horizontal displacement of 2.9m, the maximum vertical displacement of 1.02m. The types of surface rupture are mainly earthquake fault, seismic scarp, seismic fracture, seismic collapse wedge, earthquake landslide and sand liquefaction.