滇西名山点苍山地区地貌结构与特征研究  

Landform System Structures and Characteristics of the Diancang Mountain Areas in West Yunnan Province

作　　者：万晔[1] 韩添丁[2] 段昌群[1] 杨惠安[2] 

机构地区：[1]云南大学生命科学院 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《冰川冻土》2005年第2期241-248,共8页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(49461002; 49661004);中国科学院寒区旱区环境与工程研究所引进国外杰出人才基金项目(CACX2004116);云南省自然科学基金项目(2002C 0015R)资助

摘　　要：通过野外细部考察地貌发育、地貌组合和室内实验相结合的方法, 对苍山 洱海地区层状地貌结构和特征进行了分析, 对苍山及其外围山地的寒冷地貌过程和第四纪冰川作用进行了研究. 结果表明: 点苍山发育两次冰川作用, 即大理冰期早期和晚期, 是中国大陆发育古冰川的最南界. 探讨了苍山山顶古夷平面、三级广布的侵蚀面、三级混杂堆积扇群及滨湖地区的地貌结构与特征. 位于苍山北部,比苍山主峰低800 m的罗坪山发育了倒数第二次冰期(即丽江冰期), 其以复合型山岳冰川的出现为表征. 最后对海东山地和花甸坝地堑谷的地貌特征做了研究.Study of the uplift of the Tibetan Plateau and the regional environmental response was an important scientific topic. The geomorphologic actions and processes in this region are totally discussed stereoscopically in this paper by means of field expedition and in view of landform development, geomorphology group and experimental analysis. The cryogenic landform process and the Quaternary Glaciations were revealed. The research results are: There were two glaciations in the Cangshan Mountains, one was the Early Dali Glaciation and the other was the Late Dali Glaciation. The Cangshan Mountains are the southmost region of China where ancient glaciations had developed. Some geomorphologic phenomena are also demonstrated, such as palaeo-planation surfaces on mountainous tops, three erosion surfaces on mountainous slopes and three accumulation fans. The Penultimate Glaciation, i.e. the Lijiang ice period, characterized by a couple of compound mountainous glaciers, is found in the Luoping Mountain, which is located on the north part of the Diancang Mountain, 800 m lower than the highest peak of the Cangshan Mountains. The geomorphologic characteristics of the eastern mountains by the Erhai Lake and the rift valley, Huandianba basin, were also studied.

关 键 词：点苍山 地貌结构 地貌特征 寒冷地貌过程 

分 类 号：P534.63[天文地球—第四纪地质学]