垂直地壳运动的均衡失稳条件探讨

根据Lyapunov稳定理论和耗散结构理论,分析了在均衡力作用下,地壳的均衡调整运动和地壳的反均衡运动的稳定性;推导了判断均衡地壳垂直运动失稳时的熵产生判据和条件;讨论了非线性运动过程中均衡地壳运动系统的反馈性质。作为均衡地壳非稳定性运动的两个实际例子,对青海门源6.4级地震前的重力水准资料和甘肃礼县5.0级地震前的重力水准资料进行了计算,得出了与理论基本一致的结果。

THE DISCUSSION ON ISOSTATIC INSTABILITY CONDITION OF VERTICAL CRUSTAL MOVEMENT

Based on Lyapunov's stability theory and dissipative structure theory,the stability of isostatic adjustment movement and anti-isostatic movement of crust under isostatic force was analyzed; The criterion and the condition of entropy generation was deduced when the instability of isostatic crustal vertical movement was judged ;The feedback feature of the isostatic crustal movement system in non-linear movement process was discussed as two examples of isostatic crustal instability movement,the gravity and level data obtained before Menyuan M 6. 4 earthquake in Qinghai province and Lixian M 5. 0 earthquake in Gansu province were calculated and a result which is basically agreed with the theory was obtained.