• 责任者：Tang Yandong (Hunan Normal University ; Changsha 410005 ; China) ; Liu Chunping
• 刊名：Seismology and Geology
• 出版年：2013
• 卷期：35(3)
• 关键词：水位 ; water level ; 含水层 ; aquifers ; 四川 ; Sichuan Province ; 云南 ; Yunnan Province
• 页码：p.553-564
• 图表：5 illus., 1 table, 23 refs.
• 分类号：0500
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

Normal" style="margin: 0cm 0cm 0pt">
     This paper analyses the deformations of middle and southern segments of Xiaojiang Fault zone u- sing the theory of phase shift and amplitude changes between tidal water level and earth tides caused by water exchange among the systems of well hole-fracture-micro fracture. Seismic waves and deform- ation caused by tectonic stress can lead to changes of phases shift and amplitudes of tide levels in frac- tured confined aquifer. Seismic waves can increase water exchange between the aquifer and the bore- hole. So the fluid pathways can be unclogged during the earthquake and permeability in the fractured rock system can be increased after the earthquake. Smaller phase shift lag implies the higher permea- bility in the system. Permeability will return to background value gradually because of reclogging of fluid pathways and phase shift decreases. The long-term trend of phase shift represents the information of aquifer deformation caused by tectonic stress. The middle and southern segments of Xiaojiang Fault zone deform differently. The middle segment of the fault zone shows both strike-slip and compression characteristics. Deformation of this section is accumulated continuously. Phase shift and amplitude of the monitoring wells located at the intersection of Xiaojiang Fault zone and Honghe Fault zone change in a small scope. This shows that deformation of this section is not obvious and the aquifer is not squeezed remarkably.