中国大陆自然电场的前兆机理与特征
|
摘要
首先回顾了中国大陆地区震前自然电场前兆特征研究的发展历程。着重论述了震前自然电场的范围、形态、时间、与震级统计关系等前兆特征;指出震前自然电场产生的几种机理:过滤电场、扩散—吸附电位、电化学电位、机电转换效应以及压力作用下黄土层自然电位的变化;分析了自然电场是多种电信号叠加而成的一个综合电位,趋势性背景、季节性变化、地震信号和干扰因素都会引起岩石电阻率、土壤中溶液的溶解度和电离度、地下水的渗透条件、大地电场和自然电场的一系列变化。而面导电机制、体导电结构的变化造成宏观电阻率各向异性的增强并形成各测点间的电位异常,其形成机理和电磁响应特征的研究都能较好地认识地震前兆。
The development caurse of research on the precursor characteristics of natureal geoelectric field before earthquakes in Chinese mainland is reviewed firstly.Then the range,figure and period of the field,as well as the statistical relationship with earthquake magnitudes are discussed.Some possible mechanisms of natural electric field before earthquake,such as infiltration electrical field,diffuse-adsorption potential,electro-chemical potential,electro-mechanical transformation effect and natural self-potential variety of loess under pressure,are pointed out.The natural electric field is a summating potential(SP) made of many signals,the trend background,seasonal variation,seismic signal and interference factors can all cause the change of rock resistivity,ionization and solubility of solution in soil,permeability condition of underground water,also the geoelectric field and natural electric field charge.The research on these mechanism of anomalies and characteristics of electromagnetic response will help us to understand the earthquake precursors.
The development caurse of research on the precursor characteristics of natureal geoelectric field before earthquakes in Chinese mainland is reviewed firstly.Then the range,figure and period of the field,as well as the statistical relationship with earthquake magnitudes are discussed.Some possible mechanisms of natural electric field before earthquake,such as infiltration electrical field,diffuse-adsorption potential,electro-chemical potential,electro-mechanical transformation effect and natural self-potential variety of loess under pressure,are pointed out.The natural electric field is a summating potential(SP) made of many signals,the trend background,seasonal variation,seismic signal and interference factors can all cause the change of rock resistivity,ionization and solubility of solution in soil,permeability condition of underground water,also the geoelectric field and natural electric field charge.The research on these mechanism of anomalies and characteristics of electromagnetic response will help us to understand the earthquake precursors.
引文
[1]朴化荣.电磁测深法原理[M].北京:地质出版社,1990.
[2]汪万红,张慧,苏鹤军.秦岭北缘断裂带温泉水循环深度与地震活动性的关系研究[J].西北地震学报,2008,30(1):35-39.
[3]郝锦绮,冯锐,周建国,等:岩石破裂过程中电阻率变化机理的探讨[J].地球物理学报,2002,45(3):426-434.
[4]WANG Zhong-de.The Realization of Algorithm of New SpeechCommunication System Based on G.729 Algorithm[J].Tiny cal-culator information,2005,23(4):74-80.
[5]王辉,张国民,汪素云,等.应用地震学方法研究中国大陆活动地块应力应变场[J].地球物理学报,2004,47(6):1035-1043.
[6]王家映.我国大地电磁探测研究新进展[J].地球物理学报,1997,40(增刊):206-217.
[7]汪忠德,王新海,王锦芳,等.低电阻率油气储集层特征和评价技术研究[J].天然气地球科学,2008,19(3):390-195.
[8]路鹏,刘瑞丰,李志雄,等.地震科学数据的分级分类探讨[J].西北地震学报,2007,29(3):249-254.
[9]王正哲.震前低空大气层热红外增温异常机理研究[D].中国地震局地质研究所,2002:11-20.
[10]汪忠德,王新海,张汶,等.BP人工神经网络法(ANNS)在塔中地区碳酸盐岩测井评价中的应用[J].石油天然气学报,2008,30(2):253-255.
[11]张彬,杨选辉,易志刚.松潘-平武地震前地震视应变场的时空演变[J].西北地震学报,2007,29(3):121-123.
[12]陈有发,马钦忠,张杰,等.震前自然电场的前兆及其可能机理[J].华南地震,1999,19(3):27-31.
[13]张守训,李百祥.天水及其南北地区温泉分布的地质-地球物理特征[J].西北地震学报,2006,28(3):252-257.
[14]张国民,马宏生,王辉,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3):602-610.
[2]汪万红,张慧,苏鹤军.秦岭北缘断裂带温泉水循环深度与地震活动性的关系研究[J].西北地震学报,2008,30(1):35-39.
[3]郝锦绮,冯锐,周建国,等:岩石破裂过程中电阻率变化机理的探讨[J].地球物理学报,2002,45(3):426-434.
[4]WANG Zhong-de.The Realization of Algorithm of New SpeechCommunication System Based on G.729 Algorithm[J].Tiny cal-culator information,2005,23(4):74-80.
[5]王辉,张国民,汪素云,等.应用地震学方法研究中国大陆活动地块应力应变场[J].地球物理学报,2004,47(6):1035-1043.
[6]王家映.我国大地电磁探测研究新进展[J].地球物理学报,1997,40(增刊):206-217.
[7]汪忠德,王新海,王锦芳,等.低电阻率油气储集层特征和评价技术研究[J].天然气地球科学,2008,19(3):390-195.
[8]路鹏,刘瑞丰,李志雄,等.地震科学数据的分级分类探讨[J].西北地震学报,2007,29(3):249-254.
[9]王正哲.震前低空大气层热红外增温异常机理研究[D].中国地震局地质研究所,2002:11-20.
[10]汪忠德,王新海,张汶,等.BP人工神经网络法(ANNS)在塔中地区碳酸盐岩测井评价中的应用[J].石油天然气学报,2008,30(2):253-255.
[11]张彬,杨选辉,易志刚.松潘-平武地震前地震视应变场的时空演变[J].西北地震学报,2007,29(3):121-123.
[12]陈有发,马钦忠,张杰,等.震前自然电场的前兆及其可能机理[J].华南地震,1999,19(3):27-31.
[13]张守训,李百祥.天水及其南北地区温泉分布的地质-地球物理特征[J].西北地震学报,2006,28(3):252-257.
[14]张国民,马宏生,王辉,等.中国大陆活动地块边界带与强震活动[J].地球物理学报,2005,48(3):602-610.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心