地震断裂带中气体来源及运移机制研究进展

Advance in study on the source and migration mechanisms of gas in the seismic fault zone

随着新的观测技术和理论的快速发展,地震断裂带气体观测和同位素分析技术都得到长足发展,为研究微量气体运移机制以及气体来源示踪提供了重要的技术支撑.本文简要介绍了前人利用同位素技术在深部物质来源研究方面的主要进展,详细阐述了断裂带中微量气体的特征、气体运移的影响因素以及气体运移机制和理论模型,包括扩散对流作用、接力传递作用和载气运移机制.这些气体运移机制的理论模型为我们研究地震断裂带中气体行为奠定了理论基础,也为利用氡、汞、氦、氢等微量气体开展地震监测预测研究提供了更加严谨的方法.同时,对揭示地震的孕育、发生机制以及地震前兆的成因等都具有十分重要的意义.

The observation of gases and analysis technique of isotopes has considerable development with the progress of new observation techniques and related theories in recent years.It provides important technical support for researching gas migration mechanism and tracing the source of gases.In this study,previous applications of isotope to explore the source of material are investigated.Especially,the characteristics of trace gases,the influence factors,theoretical models and mechanism of gas transport in the seismic fault zone are discussed in detail,including diffusion and advection,relay transmission and the carried gas migration mechanism.These theoretical models of gas migration mechanism laid a theoretical foundation for us to research gases behavior in the seismic fault zone.It also provide a more rigorous method to research seismic fault zone by using radon,mercury,helium,hydrogen and other trace gases.Meanwhile,the study on the source and migrate mechanism of gas have great significance for studying the earthquake gestation,occurrence,the causes of seismic precursor,and so on.