新四面体理论与磁极倒转  

A NEW TETRAHEDRAL HYPOTHESIS AND THE GEOMAGNETIC REVERSALS

作　　者：王战[1] 

机构地区：[1]西安地质学院地质构造研究所

出　　处：《西安地质学院学报》1990年第2期38-45,37,共9页

摘　　要：本文以最新修正了的新四面体理论模型来解释地球磁极倒转现象及其规律性。文章简要回顾了依附于收缩说的地球四面体理论的兴衰,接着简述了应归属于脉动说范畴的新四面体理论研究的最新进展——地球多级驻波(式)脉动演化模型。新模型可概括为:地球的形态在演化过程中呈“准球体→负准四面体→准球体→正准四面体→准球体→…”的驻波脉动;在呈每种形体的大阶段中,又包含着次级、更次级的驻波脉动。然后论述了地磁极性倒转的规律性(即多变→固定[正向]→多变→固定[反向] →多变→…)以及新模型对其所做的解释(即固定正向和固定反向阶段分别为负和正准四面体阶段,多变阶段为准球体阶段)。The geomagnetic reversals and their regularities are explained with the New Tetrahedral Hypothesis amended recently by the author. This paper briefly reviews the history of the Contraction Theory,and then the several developmental stages of the New Tetrahedral Hypothesis, which has attached to the Pulsation Theory. The progress of this hypothesis, expounded in this paper, is marked by a newly proposed model, that is, the earth's multiple-order pulsation in the style of standing wave. The new model may be summarized as follows, the Earth changes its shape from paraglobe through inverted para-tetrahedraon, para-globe to the standing para-tetrahedron, because of its standing wave pulsation, and repeats the cycles continuously. Besides, the lower-order pulse cycles exist in every phase of high-order cycles. After that, this paper expounds the regularities of the geomagnetic reversals and their explanations by the new model. The evolution of the paleogeo-magnelic field shows a long stable stage characterized by the fixed polarity and a long unstable stage characterized by the repeated reversals of polarity. To go into details, the alternation of the geomagnetic polarity is as follows-'multiple-fixing (normal) -multiple -fixing ( reversal ) -multiple-' This process is the reflection of the earth's standing-wave pulsation. When the Earth is shaped as the standing or the inverted para-tetrahedrons, the geomagnetic field is at the stages of the fixed polarity, but the polarities of the two stages are just converse. By contrast,when the Earth takes the form of para-globe, the geomagnetic field is characterized by the repeated reversals of polarity. Because the Earth's standing-wave pulse is multipleordered, just as crustal waves, such alternations of the lowerorder standing and the inverted para-tetrahedron can occur at the stages of the high-order para-globe. Therefore, once comparative sizes of the Northern and the Southern Hemispheres have a little difference,the geomagnetic polarity will immediately inverted.

关 键 词：新四面体理论 磁极 倒转 脉动 

分 类 号：P318.23[天文地球—固体地球物理学]