地球膨胀可能是地壳水平挤压应力的成因

THE EARTH EXPANSION COULD BE THE CAUSE FOR FORMING THE CRUSTAL HORIZONTAL EXTRUSION STRESS

本文从地球膨胀观点出发,通过分析海陆两大类岩石圈差别,探讨地球膨胀方式,推导出地壳中如何产生水平挤压应力。文中阐述了地壳和上地幔的应力场特征,得出了两个水平主应力的构成式。再通过分析应力场中各向应力的作用,讨论了大陆地壳表面褶皱运动的发生、发展过程,断裂带、地震的可能成因以及各大陆在膨胀中被解体、分离的方式。应力构成式的计算结果表明:理论值与实际测量平均值基本一致。

Starting from the viewpoint of earth expansion and passing through the analysis of the difference between two big kinds of lithospheres in ocean and continent, the model of earth expansion is discussed and it is studied that how the horizontal extrusion stress in crust is produced. Thereby the feature of stress field in crust and upper mantle is understood and the formation formula of two horizontal principal stress is obtained. And also the generated and developed procedure of folding movement in uppermost crust of continent, the possible cause of folded zone and earthquake, and the pattern of decomposition and separation of each continents in the process of expansion are discussed by analyzing the action of each stress direction in stress field. Finally, from the computation of the stress formation formula, it is shown that the theoretical value is basically consistent with mean of the practical measurement.