汞的地球化学特征及其映震效能

汞的地球化学行为取决于汞的物理化学性质．汞在地震活动过程中的异常变化十分明显，映震效能较好。通过分析主要震例发现，汞异常特征普遍表现为高值或正脉冲及其脉冲群。异常分布范围与震级大小有关。一般来说是在异常结束后发震，但也有的是在高值段或异常恢复段发震。异常一般出现于震前几天到几个月不等。

GEOCHEMICAL CHARACTERISTICS OF MERCURY AND THEIR CORRESPONDENCE TO EARTHQUAKE

The geochemical behavior of mercury depends on its chemical and physical properties. Mercuryanomalies would be obvious before, during and after earthquakes. Anomalies of mercury concentrationhave a gcod corresPondence to earthquakes. Mercury anomalies are usually characterized by high val-ues, pulses and pulse groups. The larger the anomalous area is, the bigger the earthquake will be.Most of the earthquakes occurred when mercury anomalies almost disappeared, but some occurred dur-ing or after high values were produced. Mercury anomalies generally appear several months to severaldays before earthquakes.