摘要
对太白山三清池晚更新世冰碛物块状样进行偏光显微镜下的薄片研究发现,其微结构、构造组合为块状-异向定向构造、过渡型支撑结构、部分碎屑的极差滚圆度;其主体微构造类型为块状-异向定向构造。反映了其有别于泥石流的以弹塑性-刚性为主,流体变形为辅的特殊形成机理。并认为在沉积类型上属冰上融出碛亚相。
Through observation of the rock slice of glacial till at Sanqingchi of Tai-bai Mountain with polaring microscope, the author discovers that their component contains massive structure, different directional structure, transitional type support texture and extreme bad rundness, and the main component is massive-different directional structure. It is different from the massive-directional structure of debris flow sediments. This reflects that the special form mechanism of glacial till is mainly the mechanism of resilience-rigidity, while the fluid mechanism being subsidiary. Meanwhile, the type of glacial till is regarded as the supraglacial melt-out till subfacies.
出处
《冰川冻土》
CSCD
北大核心
1990年第3期235-241,共7页
Journal of Glaciology and Geocryology
关键词
冰川
冰期
冰碛物
微结构
微构造
poleoglacial sediments in Tai-bai mountain, microtextures and microstructures, massive-different directional structure, supraglacial melt-out till
