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运用双聚焦感应式偶极等离子质谱仪分析了比利牛斯地区泉水的化学组分和超微铅同位素。采样时序长度为598天,5.2级地震发生在此时段内。震前4天铅浓度增加了10倍,铅同位素组成显然受人类活动的影响。从地球化学异常与地震的时间间隔以及当地水文地质条件,推断出孕震过程中应变值超过一定阈值、原先无水力联系的含水层将产生混合作用的时间和地点。根据观测到的地球化学异常提出震前离心应变波是从震中传播出来的。
The chemical compositions and ultra-fine lead isotopes of springs in the Pyrenees were analyzed by dual-focus inductively coupled dipole plasma mass spectrometry. The sample sequence length is 598 days, and the magnitude 5.2 earthquake occurs during this period. Lead concentrations increased 10-fold four days before the earthquake, and the composition of lead isotopes is clearly affected by human activities. From the time interval of geochemical anomalies and earthquakes and the local hydrogeological conditions, it is deduced that the strain value in the process of seismogenic shock surpasses a certain threshold, and the time and place where the aquifer would have no mixing function will be produced. According to the observed geochemical anomalies proposed before the earthquake centrifugal strain wave is transmitted from the epicenter.