论文部分内容阅读
藏西南纳木那尼峰地区第四纪以来经历了多阶段的冰川演化,遗留了各个阶段不同类型的冰川堆积地貌和冰川侵蚀地貌。文章通过对各阶段冰积地貌的分布范围、特征的描述,并根据保存程度确定其相对地貌年龄,初步认为本地区第四纪以来倒数第3次冰期发育了规模最大的冰原冰川,倒数第2次冰期时冰原缩小并逐渐解体,末次冰期以来完全解体为山谷冰川。根据本地区槽谷的形态特征及冰川堆积物的分布,认为本地区末次间冰期前后有一次活跃的构造运动。
Since Quaternary in the southwestern Namibian region of southwestern Tibet experienced multi-stage evolution of glaciers, different types of glacial accumulated landforms and glacial erosion landscapes have been left behind. Based on the description of the distribution range and characteristics of ice accretion topography and the relative geomorphic age according to the degree of conservation, the article preliminarily considers that the glacial glacier with the largest scale in the penultimate ice age has been developed in the penultimate period since Quaternary, During the secondary glacial period, the ice sheet shrank and gradually disintegrated, completely disintegrating into valley glaciers since the last ice age. According to the morphological characteristics of troughs in the region and the distribution of glacial deposits, it is considered that there is an active tectonic movement in the area before and after the last interglacial period.