中国大陆余震活动深度分布及其流变学机制

Distribution of Aftershock Deepths in China Mainland and Its Rheological Mechanism

本文研究了中国大陆1966年以来发生的5次大地震(Ms≥7.0)的余震活动深度与地热流的关系。研究表明:地热流较高的震源区,余震活动深度分布较浅,并且得出余震深度分布受地壳内部岩石脆性-韧性转变深度的流变学特征控制的推论。

The relationship between aftershock depths and surface heat flow in the source areas of five great earthquakes (Ms>7. 0) in China mainland has been studied in the paper, it shows that the higher the surface heat flow, the more shallow the aftershock depths , and distribution of aftershock depths are under the control of the rheological mecha -nism of the rock brittle-ductile transition in the crust.