亚洲中部山地梯级地貌初步研究

PRELIMINARY STUDY ON TERRACED GEOMORPHY OF MOUNTAN IN THE MIDDLE OF ASIA

本文主要论述了亚洲中部主要山系梯级地貌的空间分布与形成原因．指出普遍存在三个地貌梯级，除第三级系晚新生代褶皱抬升而成外．第二与最高级则是在古生代褶皱山体基础上．受其间长期活动的纵向大断裂控制，而在第三纪末到第四纪早期发生不等量新构造断块活动的结果．

In the middle of Asia the main mountains (such as Altay Mts., Tianshan Mts., Kunlun Mats., Karakoram Mts., Pamir Plateau, etc) have shown as obvious terraced geomorphy, especially Altay Mts. and Tianshan Mts.. which may be graded by height.It can be seen that the terraced geomorphy of mountains tend to rise in altitude from the north to the south, resulting from different degrees of tectonics uplifts.The genesis of the terraced geomorphy is similar to that of mountains. It is decided chiefly by inner stress and subsidiarily by externel stress. The third terraced geomorphy was formed by folding and uplifting during the Late Cenozoic; on the basis of the Palaeozic folded mountains, the second and the first terraced geomorphy, owing to long-term active longitudinal faults, have resulted from uneven neotectonic fault-block movement in the Early Quaternary.