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本文通过对西起安南坝,东至昌马车路口的阿尔金断裂东北段断层气体的分析,讨论了微量气体H_2、Hg、Rn、CO_2在断层上的分布特征。指出,在同一剖面上,四种气体浓度不仅对断层有同步显示规律,而且与断层的活动强度有一定的关系。另外,分析结果还显示了H_2、Hg、Rn、CO_2的浓度有西高东低的趋势。这一特征还与地质资料所表明的阿尔金山断裂东北段西部的现今活动比东部的现今活动较强的事实相吻合。文章还讨论了用对断层气体进行定点、定期观测的结果来判断断层的活动动态及进行地震短临预报的可能性。最后指出,利用断层气体来研究活动断层是一种切实可行的方法。
Based on the analysis of the fault gas in the northeastern part of the Altyn Tagh fault at the junction of Annan dam and Chang-cha carriage in the west, the distribution characteristics of trace gases H 2, Hg, Rn and CO 2 on faults are discussed. It is pointed out that on the same section, the four kinds of gas concentrations have not only the synchronous display of faults, but also the certain relationship with the activity of faults. In addition, the results also showed that the concentrations of H 2, Hg, Rn and CO 2 tended to decrease from west to east. This feature is also consistent with the fact that today’s activities in the western part of the northeastern part of the Altun Mountains fault, as evidenced by geological data, are stronger than the present-day activities in the east. The paper also discusses the possibility of using the result of the fixed-point and periodic observation of fault gas to determine the fault’s dynamic state and make an earthquake near-instantaneous prediction. Finally, it is pointed out that the use of fault gas to study active faults is a feasible method.