剪切产热不稳定性和深源地震的孕育及发生  

SHEAR HEATING INSTALILITY AND OCCURRENCE OF DEEP FOCUS EARTHQUAKES

作　　者：张新武[1] 叶正仁[1] 滕春凯[1] 

机构地区：[1]中国科学院地球物理研究所

出　　处：《地球物理学进展》1996年第1期61-67,共7页Progress in Geophysics

基　　金：地震联合基金

摘　　要：本文运用数值分析方法，探讨了在粘弹性介质中的剪切产热不稳定性的详细动力学过程，并结合实际俯冲板块情况，分析了深源地震的形成机制，结果表明，由于粘滞损耗产热而形成的剪切产热不稳定性是深源地震可能的发生机理之一。In this paper, we study the dynamic process of the shear heating instability occured in a Maxwell body using the finite difference method and discuss the implication for the origin of deep focus earthquakes. The result shows that the shear instability due to the viscous hearing during subduction of plates is probablely one of the mechanism of deep focus earthquakes which mainly occur in subducted zones.

关 键 词：产热 不稳定性 深源地震 俯冲板块 剪切带 孕震 

分 类 号：P315.1[天文地球—地震学] P315.2[天文地球—固体地球物理学]