摘要
在乌鲁木齐河源１号冰川东支末端开挖了２号冰洞。观测表明，冰温接近且略低于冰的融点；冰晶粗大，平均直径一般达十余毫米；大部具有多极大型组构；冰川底部含岩屑层的变形对冰川运动的贡献显著；冰川末端是一个应力剧变区，应变大，纵向压缩和竖向上升明显。主应变率在１０￣（－１）ａ￣（－１）的数量级。洞壁上应变椭圆主轴的伸长、缩短和旋转均自洞里向洞外增加。
A tunnel was excavated in the terminus of the east tributary of Glacier No. 1 at thehadwaters of the Urumqi River. Observations show that ice temperature is close to butslightly lower than the melting point；crystal size is quite large，with the mean diameter reach-ing ten odd milimeters；c－axis orientation mostly appears multi－maximum pattern; thedeformation of the basal layer containing debris contributes immensely to overall motion；and the terminus is an area of radical stress changing， with large strain， significantlongitudinal compression and vertical rising；The principal strain rate is of the order of mag-nitude of 10^(-1)a^(-1)．The elongation，shortening and rotation of the principal axes of strain el-lipses on the wall of the tunnel increase from the back wall towards the tunnel entrance.
出处
《冰川冻土》
CSCD
北大核心
1994年第4期289-300,共12页
Journal of Glaciology and Geocryology
基金
国家自然科学基金
关键词
乌鲁木齐河源1号冰川
冰川学
冰洞
：Glacier No. 1 at the headwater of the Urumqi River，glaciology，ice tunnel
