龙门山古冰川作用
Journal of Glaciology and Geocryology（2017）
Abstract
汶川地震中央区域龙门山主山九顶山海拔4 984 m,山脊北坡有三处成排分布不少规模较小的冰斗-冰川谷地形,恢复当时雪线高度在4100m高度.根据其形态保存程度、古今雪线高度差等情况判断,应当是2阶段冰川作用遗存.据气温和降水资料,现在九顶山雪线高度在5000m,刚好超出九顶山顶部.故而九顶山3800m以上目前处于冰缘环境,石冰川、石环、融冻泥流等冰缘现象比较突出.九顶山不存在更老的冰川作用及其地貌遗存,是青藏高原以东5000m上下的高山只是在末次冰期时抬升跨越冰期雪线而发育冰川这一新观点的又一证据,也是青藏高原第四纪晚期剧烈抬升的又一证据.
MoreTranslated text
Key words
Jiuding Shan,past glaciations,Longmen Shan,periglacial landforms
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined