地球北纬30°构造形变带讨论

A study on the 30°N anomalous tectonic deformation zone

北纬30°构造形变带是地球形变最为活跃的区段,许多地震、电、磁等与地质演化有着直接或间接联系的"奇异现象"都发生在地球北纬20°～40°的环带上。研究表明,这主要与地球内部应力作用分布状态有关。地球作为一个球体(忽略球体的不规则性),在相对固定的旋转轴运动下,其内部应力分布形式,在南北半球的中纬度区(即20°～40°间)均为应力集中和应力转换区,使之成为地球上的"特殊地段",出现了各种物理与地质构造变迁现象。

Many ＂strange＂ phenomena,such as seismic,electric,magnetic,or other ones related with geological evolution,have occurred in a zone covering 20°～40°N of the Earth.This zone,so called 30°N tectonic deformation zone,has been the most active part in deformation and is related to the interior stress field of the Earth.When the Earth,as a sphere（ignoring its irregularities）,revolves on its own axis,stress concentration and transform significantly occur within two latitudinal zones：one covers 20°～40°N and one covers 20°～40°S.It is the stress concentration and transform that cause most of those ＂strange＂ phenomena mentioned above.