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Review on Influence Factors of Mud Cracks and Their Significance(PDF)


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Review on Influence Factors of Mud Cracks and Their Significance
LIU Chuang ZHONG Jian-hua CAO Meng-chun SUN Ning-liang WANG Ya-lin
School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China
mud crack influence factor genetic mechanism muddy sediment physical simulation temperature thichness sedimentary structure
Mud cracks are common in nature, but the genetic mechanism is not clear. The influence factors of mud cracks were summarized, and their significance was concluded, and the problems in the research of mud cracks were discussed. The results show that the internal influence factors of mud cracks include the composition and thickness of muddy sediments, and the contact relationship between the upper and lower layers; the change of thickness and composition leads to different fracture degrees; the smaller friction between the upper and lower sediments is, the more polygons of mud cracks are, and the easier warping-up of the edge is; the external influence factors of mud cracks include temperature, alternation of dry and wet environments, water and salinity and biological perturbation; the range of single mud crack is larger in high temperature; the crossing angle of mud crack tends to 120° under the condition of continuous alternation of dry and wet environments; the moisture influences the size of polygon of mud crack; the salinity influences the morphology of the edge of mud crack; the morphology of mud crack can be transformed by animals and plants; the thickness is an important factor for preserving mud cracks as well as the rapid cover of later sediments. The study on genetic mechanism of mud cracks contributes to solve the engineering problems caused by mud cracks. The appearance of mud cracks indicates that the sediments have been exposed on the surface, and the mud cracks preserved can be indicative for the ancient shoreline, the regional uplift of strata, the climate changes of cold-warm and dry-wet, and so on.




Last Update: 2017-07-28