同位素地球化学在地震监测预测研究中的应用进展

Recent Development of Isotope Geochemical Application in Earthquake Monitoring and Forecasting

摘要:

随着新观测技术和理论的进一步发展,同位素地球化学方法在地震监测预测研究中发挥了越来越重要的作用。通过同位素地球化学方法确定地下流体来源,研究地下流体循环特征,分析地震前兆异常的成因,评估地质构造活动的程度,开展地震预测研究。同位素示踪技术还可以结合深源流体监测和地球物理方法,揭示地震孕育、流体与震源之间的关系。此外,同位素地球化学还可以构建断裂带流体地球化学背景特征,用于地震监测点映震效能的评估,提高地震监测预测的准确性,为地震新监测点的布设和震情跟踪提供技术支撑。通过对现今同位素在地震监测预测中所使用的方法、技术及国内外应用情况的总结分析,力图全面认识同位素地球化学在地震监测预测应用中的现状及发展趋势。

Abstract:

With the development of new observation techniques and theories,isotope geochemical method is playing an increasingly important role in earthquake monitoring and forecasting studies,in which the method can be used to determine the source of subsurface fluids,to study the characteristics of subsurface fluid circulation,to analyze the causes of earthquake precursor anomalies,to assess the geological tectonic activity,and to conduct earthquake forecasting studies. Isotope tracing technology can also be combined with deep-source fluid monitoring and geophysical surveys to reveal the relationship among earthquake genesis,fluids and earthquake sources. In addition,isotope geochemistry can construct fluid geochemical background characteristics of fracture zones,which can be used for the evaluation of seismic monitoring sites to reflect seismic effectiveness,improve the accuracy of earthquake monitoring and prediction,and provide technical support for the deployment of new earthquake monitoring sites and earthquake activity situation tracking. By summarizing and analyzing the methods,techniques and applications of isotopic analysis in seismic monitoring and forecasting at home and abroad,we try to get a relatively comprehensive understanding of the current situation and development trend of isotope geochemistry in seismic monitoring and forecasting applications.