ZHAO Jing bo 1. Five Great Changes in Development Process of Loess Plateau[J]. 2002, 16(1): 132-135.DOI：
黄土高原发展过程中的五大转折
摘要
自黄土高原形成以来
已发生了 4次大转折
并将发生第 5次大转折。第 1次转折发生在距今 2 .5 0 Ma前后
是红土高原向黄土高原的大转折
驱动力是气候。第 2次转折发生在距今 1.6 0 Ma前后
是该区主要河流从无到有的大转折
代表新构造运动的转折
驱动力是构造上升。第 3次转折发生在距今 15 ka前后
是黄河由流入湖盆向流入海盆的大转折
也是黄土物质由高原的内部侵蚀搬运向区外搬运的大转折
驱动力是流水作用。第 4次转折发生在距今 0 .4 ka前后
是黄土高原自然侵蚀向非自然加速侵蚀的大转折
驱动力主要是人类活动。第 5次大转折将发生在未来 10 0年之内
是与第 4次大转折相反的转折
驱动力也是人类活动
Abstract
Four great changes have happened since the formation of Loess Plateau and the fifth change will happen. The first change happened 2.50Ma ago
which is the change from laterite plateau to Loess Plateau
and the motive power is climate. The second change happened 1.60Ma ago. After this change
rivers advented
the change represents the change of new tectonic movement in Loess Plateau
the motive pewer is tectonic uplifting. The third change happened 15ka ago
and is affluent change of the Yellow River from running into lake to running into sea and the change of loess material from the internal transportation in Loess Plateau to the external one
the motive power is running water action. The fourth change happened 0.4ka ago
and is change from natural erosion to nonnatural acelerated one in the area
the motive power is mankind activity. The fifth change will happen in 100 years
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