论中国大陆岩石圈构造的基本特征

THE BASIC CHARACTERISTICS OF THE TECTONIC EVOLUTION OF THE CONTINENTAL LITHOSPHERE IN CHINA

作者指出:中国大陆构造具有小陆块、多缝合带、软碰撞、多旋回缝合的特点,并受到古亚洲、特提斯、环太平洋三大动力学体系的作用。因此,中国及邻区大陆岩石圈经历了极为复杂的多层次镶叠式结构,以及多旋回分阶段的演化过程。在深入和具体地研究中国大陆时,必须把它放在全球构造的总格局中进行剖析,从中发现新的规律,以丰富和发展现代地球科学的理论,这是中国地学工作者的历史责任。

Microcontinental blocks of varying sizes and the linear tectonic belts between them constitute a rather complicated pattern of mosaic structure, and in this way the continental lithosphere of China and its adjacent regions as a whole shows an extremely complicated, mosaic-imbrication structure in three dimensions. The intersection and superposition of the paleo-Asian, Tethyan and circum-Pacifie geodynamic systems created a polyeyclie, Periodical evolution in the history of the area, which is, though complex, recognizable. Subduction and collisional orogeny in China during the paleozoic and Early Mesozoic were represented by closing of small oceanic basins and the soft collision between microcontinsntal blocks, rather than by closing of large oceanicbasins and the hard collision between huge continents. Thus, long after the collision in the paleozoic, the Yangtze, Sino-Korean and other blocks did not unite as one though they stood side by side. And hence, polycyclic subduction and orogeny of the continental crust is considered be a Prominent feature of the continental tectonics of China as well as Asia.