COMPREHENSIVE ANALYSIS OF HUGE LEVELING DEFORMATION ANOMALY AT LINFEN LONGCI SEISMOSTATION
Liu Ruichun 1,2) ;Ji Lingyun 3,4) ;Qi Lang 5) ;Jin Hongliang 6) ; and Zhang Shuliang 1)
1)Earthquake Administration of Shanxi Province,Taiyuan 030021;2)Taiyuan State Observatory of Continental Rift Valley Dynamics,Taiyuan 030021;3)Second Crust Monitoring and Application Center, CEA,Xi’an 710054;4)Institute of Geology, CEA, Beijing 100029;5)Institute of Earthquake Disaster,SXEA,Taiyuan 030002;6)Linfen Central Seismostation of Earthquake Administration of Shanxi Province,Linfen 041000
Abstract：The ground vertical deformation fields during the two times of huge deformation anomaly are figured out by DInSAR technique,along with the results of highdensity electric exploration around No BM3 benchmark, we drew several conclusions. Firstly, the InSARderived deformation fields indicate there is no continuous deformation anomaly that is related to the fault strike. In another word, the anomaly only showed in a local small area. The other fact is that the No BM3 benchmark was built on the Holocene secondary loess, with the subsidence velocity of 5.11mm/a which is four times of the No BM4. And the anomaly time is consistent with that of the tomb construction. Secondly, the anomaly at No BM3 benchmark should be related to the newly made tomb. The tomb construction may break the impermeable layer, which created a conduit between ground surface and the deepth. Thus, the No BM3 benchmark showed a rapid subsidence during the irrigation season when the subsurface erosion action made upper soil loose.
Liu Ruichun,Ji Lingyun,Qi Lang et al. COMPREHENSIVE ANALYSIS OF HUGE LEVELING DEFORMATION ANOMALY AT LINFEN LONGCI SEISMOSTATION[J]. jgg, 2012, 32(4): 20-24.
