冰川冻土 ›› 1984, Vol. 6 ›› Issue (2): 15-25.

• 研究论文 • 上一篇    下一篇


徐叔鹰, 张维信, 徐德馥, 徐齐治, 石生仁   

  1. 兰州大学地质地理系
  • 收稿日期:1983-07-10 出版日期:1985-05-25 发布日期:2012-04-26

Discussion on the Periglacial Development in the Northeast Marginal Region of Qinghai-Xizang Plateau

Xu Shuying, Zhang Weixin, Xu Defu, Xu Qizhi, Shi Shenren   

  1. Deportment of Geology and Geography, Lanzhou University
  • Received:1983-07-10 Online:1985-05-25 Published:2012-04-26

摘要: 青藏高原东北边缘地区是指以祁连山东段为主体的祁连、昆仑和秦岭三大山系交汇地段。本文根据野外观察和放射性同位素测年资料研究了现代高山冰缘带特征及晚第四纪古冰缘现象,对主玉木冰期以来冰缘环境发展作了探讨。文中引用C14年龄是由兰州大学C14实验室和中国科学院地球化学研究所C14实验室测定的。

Abstract: Based on. the field investigations and.-carbon 14 data, this paper describes characteristics of present periglacial belt,ancient periglacial phenomena and periglacial development since main Wurm-glaciation in the Northeast marginal region of Qinghai-Xizang Plateau. In the Qilian Shan and similar areas of high elevation, the vertical structure of present periglacial is very distinct, periglacial phenomena have multitudinous types. During the main Wttrm-glaciation and the two cold periods of the Holocene, pingos, sand wedges, involutions, block fields, fors, altiplanation terraces, sorted and non-sorted polygons, and periglacial dunes, etc. were formed. During the main-Wtirm glaciation and Neoglaciation periods, the low limits of the periglacial belt were lower than those of present by 1200 to 1400 m and 300 to 500 m respectively.