地理学报 ›› 1995, Vol. 62 ›› Issue (4): 368-376.doi: 10.11821/xb199504009

• 论文 • 上一篇    下一篇

南极东部拉斯曼丘陵区的地貌

李栓科   

  1. 中国科学院 国家计划委员会地理研究所, 北京 100101
  • 收稿日期:1993-08-01 修回日期:1994-10-01 出版日期:1995-07-15 发布日期:1995-07-15
  • 基金资助:
    八五科技攻关项目,中国科学院八五重大项目,中国科学院地理研究所所长基金

GEOMORPHOLOGY RESEARCH ON THE LARSEMANN HILLS,EAST ANTARCTICA

Li Shuanke   

  1. Institute of Geography,Chinese Academy of Sciences and the State Planning Commission of P.R. China, Beijing 100101
  • Received:1993-08-01 Revised:1994-10-01 Online:1995-07-15 Published:1995-07-15

摘要: 拉斯曼丘陵地处极地永久冻土带,风力作用频繁。各种冰缘过程主宰了现代地貌特征的形成,无冰区历史短暂及南极东部古老结晶地盾的相对稳定性,使风化微弱,并以寒冻风化为主。风力地貌、冰缘地貌、冰川地貌、湖泊地貌、海岸地貌和构造地貌组成本区主要的地貌类型,各种堆积地貌形态均不发育。西部地区地貌形态相对年轻,残存的冰碛物地表分布特征指示冰盖后退依东北到西南方向进行,海岛、半岛及冰陆过渡带构成该丘陵三个差异明显的地貌单元。

关键词: 南极, 极地地貌, 寒冻地貌, 地貌类型

Abstract: The Larsemann hills are a series of gneiss islands and peninsulas extending into Prydz Bay, with an ice free area of approximately 200 km2 at 69°21′S 69°28′S and 76°00′E 76°25′E on the Ingrid Christensen Coast of Princess Elizabeth Land in East Antarctica. The area lies in the pole permafrost zone, aeolian action is very frequently and generally. The characteristics of modern landform are controled by periglacial processes. Because of the short history of ice free area and the relatively stable older Archean Shield, the weathering process is very weak with mainly mechanical weathering, especially frost process. The major geomorphic types consist of aeolian landforms. periglacial landforms,glacial landforms, lake landforms, coast landforms and geological structure landforms, etc. The deposited landforms have not been developded successfully and fully. The landforms on the west hills are relatively young. The direction of glacial retreat is from NE to SW, according to the distribution of glacial relics, i. e. , moraines and rub traces. Islands. peninsulas and ice-land transition zone are three geomorphic regions.

Key words: Larsemann Hills, geomorphic factors, landforms, regional composition

中图分类号: 

  • P931.2