高校地质学报2018，Vol.24Issue(1)：97-108,12.DOI:10.16108/j.issn1006-7493.2017053
甘肃敦煌地区现代泥裂几何学特征及成因机制探讨
Geometric Features and Genetic Mechanism of Modern Mud Cracks in Dunhuang,Gansu
摘要
Abstract
Sedimentary structure is one of the mainelements of sedimentology.And mud cracks,which belong to the exposure related structures, have been interested by scholars. In this study, mud cracks in Akesai River and Dang River, Dunhuang, Gansu were classified according to shape characteristics and edge features of the polygon.Geometric features were characterized and the difference of forming mechanisms was discussed for different types of mud cracks.The results show that there were rectangular,circular,irregular, duplex and edge-curl mud cracks in Akesai River and Dang River, Dunhuang, Gansu. Temperature, sediments properties, the differences between the upper and the lower, the salinity and biological activity influenced the formation of mud cracks. Moreover, rectangular mud cracks tend to develop on the slope formation which was uncomfortable.The argillaceous sediments overlying siltstone was usually thinner in the typical edge-curl mud cracks. The process of the mud crack development is divided into initial stage, cracking stage, separation stage, and buckling stage. In addition, duplex mud cracks may be used to help understand changes in palaeocurrent and palaeoclimate.关键词
泥裂/几何学特征/类型/影响因素/成因机制/甘肃Key words
mud cracks/geometric features/types/influencing factors/genetic mechanism/Gansu引用本文复制引用
刘闯,钟建华,曹梦春,孙宁亮,郝兵..甘肃敦煌地区现代泥裂几何学特征及成因机制探讨[J].高校地质学报,2018,24(1):97-108,12.基金项目
国家自然科学基金(41572088) （41572088）
中央高校基本科研业务费专项资金(16CX06044A)联合资助 （16CX06044A）
