对地质节律与地球动力系统的思考

文章对地质历史过程中出现的各种节律现象进行了分析，并就其可能的形成原因进行了初步讨论，认为地球的内部动力作用是地质节律形成的主要的动力学背景。地球内部动力系统的能量主要来源于原始增生热、短寿命放射性核素和长寿命放射性核素衰变产生的辐射能等；能量主要以热传导、热对流的方式由地球内部通过岩石圈向外耗散，并导致岩石圈的板块运动；内部能量的释放是呈指数衰减的，在此背景上叠加着非线性的、脉冲式的变化。在分析地球动力系统的主要特征基础上，笔者将地球视为一个自组织临界状态的自然系统，提出一个简单地球热动力系统模型，对地质节律现象进行模拟，并对未来地球动力系统模型要考虑的主要问题进行了简要讨论。

PONDERATIONS ON THE RELATION BETWEEN THE GEO LOGICAL RHYTHMS AND THE GEODYNAMIC SYSTEM

This paper deals with the appearance and the cause of geological rhythms. The terrestrial dynamics combined with extra terrestrial dynamics is considered to be the dynamic background for the development of geological rhythms. The main features of the geodynamic system have been described. And it is indicated that the Earth's internal sources of heat such as the long lived and the short lived radioactive isotopes, and the conversion of Earth's rotational energy to heat are the potential forces of the Earth's internal movement. The heat escaping from the deep interior through the lithosphere is mostly transferred by lattice thermal conduction and convection that leads to the movement of the lithosphere plates and the heat escaping pulses in non linear law on the background of attenuation in index law. Accordingly a preliminary model of geothermodynamics has been constructed to simulate the geological rhythms. Some questions which must be considered when we study geological rhythms have been discussed too.