Physical simulation and mechanism analysis of soft￣sediment slump deformation
Chen Junfei1, 2, Zhang Changmin2, Zhu Rui2, Yang Bo3, 4, Yan Qi2, 5, Lu Xiaolin2, 5, Zhu Aiguo2, 5
1 School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083; 2 School of Geosciences,Yangtze University,Wuhan 430100,Hubei; 3 College of Energy,Chengdu University of Technology,Chengdu 610059,Sichuan; 4 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,;Chengdu University of Technology, Chengdu 610059, Sichuan; 5 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249
Abstract Soft￣sediment slump deformation is a geological phenomenon,which is significant in analyzing regional geology history and directing petroleum prospecting. So it became valued by scholars in geoscience rapidly in recent years. However,most studies are qualitative descriptions based on observations in the field,and the process of deformation and genetic mechanism were less. A set of simulation device and the complete experimental program has been designed to simulate soft￣sediment slump deformation driven by gravity under the background of slope. The materials with different viscosity to simulate strata were used in the experiment,and the angle of the box was changed to simulate the angle variation of the stratum many times. Then the evolution model of soft￣sediment slump deformation were summarized: At the beginning of the deformation,stratum upheaval occurred gradually;as the slope become steeper,in turn,slump folds develop into round-hinged folds and then tight isoclinal folds. After faults formed,folds develop into deformation like rootless isoclinal folds and sheath folds,and the deformation continues till strata come to be stable. The deformation mechanism of the soft￣sediment slump deformation was analyzed: Driven by gravity soft￣sediments slide down along the slope, and the deformation was caused by the shear effect between layers.
Fund:Financially supported by the National Natural Science Foundation of China(No.41402098)
About author: About the first author Chen Junfei,born in 1992,is a master degree candidate in School of Ocean Sciences,China University of Geosciences(Beijing). He majors in petroleum geology. E-mail: chenjunfei@cugb.edu.cn.
Cite this article:
Chen Junfei,Zhang Changmin,Zhu Rui et al. Physical simulation and mechanism analysis of soft￣sediment slump deformation[J]. JOPC, 2017, 19(1): 139-146.
Chen Junfei,Zhang Changmin,Zhu Rui et al. Physical simulation and mechanism analysis of soft￣sediment slump deformation[J]. JOPC, 2017, 19(1): 139-146.
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