| 东西构造带形成机制和有关问题的讨论 |
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| 引用本文：陈庆宣,石耀霖.1980.东西构造带形成机制和有关问题的讨论[J].地球学报,2(1):1-10. |
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| 中文摘要:<正> 早在二十年代初期,李四光教授在研究中国和东亚各种类型构造体系的时候,就明确指出地壳表面存在着沿一定纬度分布的东西向构造带。以后又进一步讨论了它们长期发展的历史和它们在全球的规模。他从不同类型构造体系在地壳上分布和排列的规律,探索构造运动的起源,认为这些构造体系所表现的方向性显然与地球的旋转轴有一定的联系,它们的成生与地球自转角速度的变化密切相关,当地球自转角速度发生变化时,它的离心惯性力也随着发生变化,离心惯性力的水平分力推动着地壳的定向水平运动——经向和纬向水平运动。 |
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| A DISCUSSION ON THE MECHANISM OF FORMATION OF LATITUDINAL TECTONIC BELTS AND RELATED PROBLEMS |
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| Abstract:Prof. Li Sze-Kuang (J. S. Lee) had suggested that the change of velocity of the earth s rotation is the fundamental cause of crustal mo-vement and that tectonic systems are formed during the period of the spee-ding up of earth s rotation. We have calculated the stress distribution arisingfrom the change of angular velocity of earth s rotation assuming a simplifiedearth model which has three homogeneous spherical elastic layers corresponding to the liquid core and solid mantle and crust of the earth respectively and a boundary condition between the outer and the intermediate layer that the radial displacement and normal stress are continuous while the tangential displacement may occur frictionlessly simulating the effect of the low viscocity layer during long term motion. |
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