img

官方微信

高级检索

中国沙漠 ›› 1995, Vol. 15 ›› Issue (1): 65-70.

• 论文 • 上一篇    下一篇

黄河上游玛曲地区晚全新世沙漠化

邹学勇, 王贵勇   

  1. 中国科学院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1993-04-01 修回日期:1994-08-01 出版日期:1995-03-20 发布日期:1995-03-20
  • 基金资助:
    国家自然科学基金资助

A STUDY ON DESERTIFICATION SINCE LATE HOLOCENE IN MAQU AREA,UPSTREAM OF HUANGHE RIVER

Zou Xueyong, Wang Guiyong   

  1. Institute of Desert Research, Chinese Academy of Sciences, Lanzhou, 730000
  • Received:1993-04-01 Revised:1994-08-01 Online:1995-03-20 Published:1995-03-20

摘要: 本文通过野外调查和样品室内分析, 探讨了玛曲地区沙漠化过程。结果表明, 该区晚全新世以来的沙漠化与全球变化具有一致性, 沙漠化的发生发展受控于全球变化。据14C测年, 沙漠化主要经历2600-1990 a B.P..1990-750 a B.P..750-220 a B. P.和220 a B.P.至今四个阶段, 而220a B.P.以来的现代沙漠化是自然因素与人为作用迭加的结果。

关键词: 玛曲地区, 晚全新世, 沙漠化

Abstract: In Maqu area,the mian cause of desertification lies in the Climatic changes.According to field work and 14C dating,the desertification in the area experienced four perieds,namely 2 600-1900 aB.P.,1900 750aB. P.,750-220aB.P.and 220 a B.P.to today.Only in the period from 220 a B. P. up to now,the desertification process was influenced by both the climatic changes and human activities.The desertification processes are consistent with Chinese climatic chamges and the desertification processes in Genghe basin. With prolonged deflation some steady minerals are accumulated and sand well sorted,although the eolian sand mainly comes from the deposits of Huanghe River.

Key words: Maqu area, Late Holocene, Desertification