冰川冻土 ›› 1984, Vol. 6 ›› Issue (2): 77-82.

• 研究论文 • 上一篇    下一篇


李华章, 邵雪梅, 刘杰, 林宁辉, 朱陆贞   

  1. 北京师范大学地理系
  • 收稿日期:1983-01-25 出版日期:1985-05-25 发布日期:2012-04-26

Questions about Glacial Traces in the Tanzhesi Area in Beijing

Li Huazhang, Shao Xuemei, Liu Jie, Lin Ninghui, Zhu Luzhen   

  1. Department of Geography, Beijing Normal University
  • Received:1983-01-25 Online:1985-05-25 Published:2012-04-26

摘要: 新中国成立后,随着大规模水文地质勘探的开展,不断地报道了在我国境内发现的古冰川地点。众所周知,冰川分布规律是有章可循的。李四光教授曾指出确定冰川活动必不可少的证据是:1.大片冰层在山区停积及其向低处移动的痕迹;2.冰碛;3.冰水沉积和其它冰缘沉积[1]。他同时强调将三者联系起来,以显示冰川的滋长、活动和消失过程。

Abstract: Some documents pointed out that glaciation occurred in the low-lying mountainous region of the Tanzhesi area in the western part of Beijing during the Quaternary period with glacial landform remains,such as,U-shaped valley, glacial spillway, glaciated rock surface, gravels with striae sculptured by glacier and so on. From field work analysis, the authors rebuilt the evolutionary processes of the landscape in accordance with the landforms and Quaternary sediments and hold that all the landforms were the result of fluvial erosion instead of glaciation. The reasons are as follows:1. If there had been glaciation in this area during Quaternary period all the red weathered crust surviving on the surface of the base rock would have been denuded.2. The sediments in the broad valley have been sorted out obviously according to their sizes.3. Most of the semicircular depressions on the sunny slope are the result of nivation.4. Beijing lies in the middle latitude with low mountains and hills. Although the temperature experienced warm and cold alternative variation since Quaternary, this area is controlled by monsoon which is not favourable for the formation of glacier.