山东蒙山与四川海螺沟冰川擦痕特征对比及成因分析

Characteristics Comparison and the Origin Analysis of Glacier Scratches in Hailuogou of Sichuan Province and Mengshan in Shandong Province

摘要:

冰川擦痕在冰川遗迹的判断中具有极为重要的意义，其中以槽谷岩壁擦痕与冰碛砾石擦痕最为明显。槽谷岩壁擦痕具有细长密集、近似平行的特征；冰碛砾石擦痕具有短粗稀疏、方向杂乱的特征。除此之外，还有弧形擦痕、逆冲擦痕、新月形凿口、新月形裂纹、新月形裂口、颤痕等刻蚀遗迹的配套产出。经对比分析，蒙山发育的擦痕与四川海螺沟现代冰川谷内的擦痕具有完全的一致性，因此进一步确定了蒙山擦痕的冰川成因。

Abstract:

Glacier scratches are vitally important evidence to judge the relic of glacier. Scratches in rock face of trough valley and in ice gravel are very obvious. Scratches in rock face has the characteristics of long and thin, intensive and parallel; while scratches in ice gravel has the characteristics of short and thick, sparse and non-directional. There are also arc scratches, thrust scratches, crescent-shaped break, crescent-shaped crack and striation. Through comparative analysis, the scratches developed in Mengshan mountain are completely consistent with those in the modern glacial valley of Hailuogou in Sichuan province. Therefore, the glacial origin of the scratches in Mengshan mountain is further determined.