摘要
介绍了广东阳江新洲地热田深部地下水关联井水显著异常,广西北流—广东化州MS 5.2级地震发震前,新洲地热田监测井中两次延续数十小时的水位上涌现象,该现象解析是由于地热田东西向断层被挤压,引起深部地下水上升受阻而向地热田周边浅层地下水排泄,最终导致监测井中水位上涨。这意味着新洲地热田浅层地下水受深部地下水的影响,这种地下水体系对地应力活动引起的应变更敏感。研究结果对地震先兆、深部水文、深部地热均有参考意义。
This paper introduced the significant abnormality of well water related to the Xinzhou geothermal field in Yangjiang,Guangdong.Before the Beiliu-Huazhou MS 5.2 earthquake in the junction of Guangxi and Guangdong,the monitoring well in Xinzhou geothermal field recorded twice water-level upswellings,which lasted for several tens of hours.This phenomenon occurred probably as a result of squeezing in the east-west fault of the geothermal field,leading up to the deep groundwater to rise and being drained to the shallow groundwater around the geothermal field,eventually surging of water levels in the monitoring well.This means that the shallow groundwater in the Xinzhou geothermal field is affected by the deep groundwater.This groundwater regime is particularly sensitive to strains due to in-situ geo-stress activities.The research results have implication significant for earthquake precursors,deep hydrology and deep geothermal.
作者
卢国平
黄雷辉
陈幸莲
胡虹羽
胡晓农
LU Guoping;HUANG Leihui;CHEN Xinglian;HU Hongyu;HU Xiaonong(Institute of Groundwater and Earth Sciences,Jinan University,Guangzhou 510632,China;Guangdong Provincial Geophysics and Deposit Exploration Brigade,Guangzhou 510800,China;Yangjiang Seismic Bureau,Yangjiang 529500,China)
出处
《华南地震》
2020年第2期13-18,共6页
South China Journal of Seismology
基金
国家自然科学基金(41572241)
暨南大学教师启动资金联合资助。
