拉萨夺底沟-哲蚌寺壶穴特征探讨

笔者对西藏拉萨夺底沟-哲蚌寺一带新近发现的壶穴进行了先期考察,测量了壶穴的长、宽、深以及串珠状壶穴的走向、岩体的节理方向等参考系数,参考国内外相关研究资料进行比对,得出该区壶穴明显具有口大肚小的特征。壶穴发育数量多且密集呈串珠状分布,不仅大小差异不是很明显,而且形态差异一致。然而,这些特征不适用于内地壶穴,综观国内外各类壶穴形态特征,结合笔者自己的研究成果,对壶穴的成因进行了分析,发现其成因由西藏地质结构复杂多样、高寒气候、环境独特所致。

Preliminary Discussion on Bottom Groove-Pothole features of Lhasa drepung area in Tibet

By reading a lot of domestic and foreign literature about the Pothole, early investigation about the newly discovered pothole, in area of Bottom Groove and Drepung Monastery, was made to measure the length, width, and depth of the pothole. The joint direction of main reference coefficient of rock mass was also measured. Referring to the domestic and international relevant research data, the pothole in the area has obviously characteristics of big mouth and small belly. The pothole grew in a large quantity and arranged as a string of beads and intensive distribution. Not only the size but also the morphologic differences, and these characteristics is not suitable for mainland pothole. Throughout morphological features of domestic and foreign various caves, and combined with their own research results, this paper analyzes the causes of pothole, which was aroused by the complicated Tibet geological structure, alpine climate and unique environment.