洋幔锥下沉扩张挤压陆幔锥之地球动力新观——地球爆抛月球及收缩演化学说

A NEODOXY OF GEODYNAMICS-SUBDUCTION AND EXTENSION OF SUBOCEANIC MANTLE CONE COMPRESS SUBCONTINENTAL MANTLE CONE

地球动力问题是地学的重大课题。总结地质史 ,可以发现地球冷却收缩演化的基本趋势。根据洋壳薄而平、陆壳厚而曲的物理差别 ,可以导出洋幔锥下沉收缩速度高于陆幔锥———洋降陆升的基本趋势。板块学说普遍证明洋壳挤压陆壳 ;地球物理资料普遍证明洋幔锥重于、硬于和强于陆幔锥。洋幔锥垂向收缩 ,而水平收缩率仅是陆幔锥的 1/ 4,因此在下沉运动中角度增大 ,从而对周围陆幔锥产生斜张压力 ,导致陆幔锥的水平收缩和上升。与之同时 ,陆壳随陆幔锥的曲变而堆挤褶皱 ,洋壳随洋幔的曲变而轻度曲变。全球褶皱构造带的空间分布规律完全符合这种地球物理机制。由此所导出的经验公式为 :洋幔锥的水平张度和表面积成正比 ,洋幔锥水平扩张体积值等于下沉体积值。这一新观点 ,是笔者以地月关系证明地球在诞生初期爆抛月球 ,太阳于诞生初期爆抛地球的系统研究中诱发导出的 ,从而奠定了地球。

Geodynamics is an important topics of geoscience. Summaring up the geologic history, it is fournd the basic trend the cooling shrinkage and evolution of the earth. According to the physical differences-oceans are low while continents are high ocean crusts are the in and flat while continents ones are thick and curved, it has been deduced the basic trend of ocean sinking and continent raising-the sinking and shrinkage speed of suboceanic mantle cone is higher than that of subcontinental mantle cone. The plate tectonics universely proves that ocean crusts force continent crusts, and geophysical materials prove that suboceanic mantle cone are heavier, harder and stronger than subcontinental mantle cone. Since suboceamic mantle cone vertically shrink and horitontally extend. its angle and area increase during the sinking action, which produces barocline force to surrounded subcontinental mantle cone and induces horizontal shrinkage and raise of subcontinental mantle cone. At the same time, continents crusts push felds when subcontinental mantle cone curves. and ocean crusts extend with extension of suboceanic mantle cine. The space distribution regularity of global folded tectogene is well agreed with the geophysical mechanism. And an empirrical eguation is deduced as the horizontal relaxation of suboceanic mantle cone is proportatinal to its superficaial area. and its horizontal extension volume is equal to its sinking volume.This neodoxy has been deduced from the systematic research work,during which the auther, with the earth moon relations proved that the earth the moon originated from an explosive throwing of the earth shortly after the earths birth and the earth originated from an explosive throwing of the sun shortly after the suns birth. Thus, the astronomy foundation of the inhomegeneous shrinkage evolution of the earth and crusts,has been laid. [