论冰碛石的形态特征及其与泥石流石的区别

A study on the morphological features of glaciated stone and its differences from debris flow stone

长期以来流行的球度和圆度概念不足以刻画冰碛石及其他成因砾石的细微特征,需要在其基础上进一步挖掘有判别价值的标志性特征。针对冰碛石与泥石流石辨识的疑难问题,提出外接圆特征、粗糙度特征、圆度-体积特征以及混杂堆积砾石形态构成特征等几个概念。通过这些特征研究,结合真实的冰川擦痕、颤痕等标志,可更加准确地进行冰川沉积物与其他成因沉积物的判定。

The sphericity and roundness of clasts have been used to distinguish glacigenic stones and other diamicton deposits for a long time,however,it is not enough to describe the subtle features among them.There⁃fore,it is necessary to further excavate the more discriminative indicator.Aiming to identify the glaciated stones and debris flow stones,several concepts are presented in this paper,including external circular feature,rough⁃ness feature,roundness-volume feature and their multimodal mixing characteristics in the diamicton deposits.These features,combining with other micro-morphological features,such as the glacial striations,glacial chatter marks,can be used to determine the origin of contentious deposition,especially in the eastern China.Mean⁃while,the author hope that these suggestions will be corrected and improved in practice.