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冰川沉积物的成因鉴定一直存在争论 ,尤其是体现在讨论第四纪冰川沉积物的成因确定问题方面 ,传统地质学从冰川沉积物的沉积学和地貌学特征方面来讨论其成因受到了挑战。本文试图从沉积砾石中寻找与冰川成因直接相关的应力信息 ,进而提出用砾石的声发射应力测量法确定其冰川成因的新认识。首先对现代冰川砾石进行声发射应力测量 ,将此测量值再与砾石所受的实际铅直应力值比较 ,研究显示二者对应很好 ,说明冰川砾石是能够记忆上覆冰层所造成的应力 ;其次 ,无争议的第四纪冰川砾石亦具有对应的应力记录 ;最后讨论有争议的庐山地区第四纪冰川沉积 ,研究揭示了砾石中存在对应于古冰川成因的历史应力 ,证实该区第四纪泥砾层为古冰川沉积。因此 ,砾石的声发射应力测量法是冰川沉积物成因确定的一种新方法。
The genetic identification of glacial sediments has been debated. In particular, traditional geology has challenged the genesis of glacial sediments in terms of sedimentology and geomorphology, especially in discussing the genesis of Quaternary glacial sediments. This paper attempts to find out the stress information directly related to the origin of glaciers from the sedimentary gravel, and then put forward the new recognition of the origin of the glacier by gravel acoustic emission stress measurement. Acoustic emission stress measurement of modern glacier gravel is first carried out. Comparing this measured value with the actual vertical stress of gravel, the study shows that the two correspond well to each other, indicating that glacial gravel is able to memorize the stress caused by overlying ice Secondly, the unconstrained Quaternary glacial gravel also has corresponding stress records. Finally, the controversial Quaternary glacial deposits in Lushan area are discussed. The study reveals the historical stress in the gravel corresponding to the origin of the ancient glaciers. Fourth Century mud gravel for the ancient glacial sediments. Therefore, gravel acoustic emission stress measurement is a new method to determine the origin of glacial sediments.