中国三大基本构造单元的地球物理特征的研究

本文以中国大陆地壳的三大基本构造单元——地槽区、地台区和地洼区为研究对象,较系统地统计了不同类型的构造区的地球物理特征及其相互间的差别,探讨了由此反映出来的深部构造特点。重点探讨了中亚地洼区与华夏型地洼区在地球物理特征和深部构造上的异同;对三个残留地台现阶段的构造运动状态提出了个人的看法。在综合分析各构造单元的地球物理特征及其深部构造形成演化的可能原因的基础上,从地球物理的角度初步探讨了地壳演化发展的动力学机制。

STUDY ON THE GEOPHYSICAL CHARACTERISTICS OF THREE BASIC GEOTECTONIC UNITS IN CHINA

In this paper, the statistical research about the geophysical characteristics of different types of tectonic areas, the differences between them and the deep-seated structures which are reflected by this are approached, with three basic geotectonic units of Chinese continental crust-geosynclinal area, platform and diwa region- being taken as research objects. Stress has been laid on analysing the similarities and differences between diwa regions of Central-Asian type and Cathaysian type in the geophysical characteristics and deep-seated structure, and then the writer proposes his opinion about the current tectonic movement state of three little remainder platforms. Based on the comprehensive analysis of the geophysical characteristics of various tectonic units and the possible cause of their deep-seated structures' formation and evolution, the dynamic mechanism of crustal evolution has been described from the geophysical angle.