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《Journal of Palaeogeography》 2006-01
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Study on large-scale circular slump structures on Luokou point bar in downstream of Yellow River

Wang Yongzhuo Zhong Jianhua Wu Kongyou China University of Mining and Technology ( Beijing ) , Beijing 100083 Daqing Oilfield Limited Company, Daqing 163712, Heilongjiang Earth Resource and Information College, China University of Petroleum , Dongying 257061, Shandong  
Two large-scale circular slump structures are well developed on the middle-rear Luokou point bar of the downstream of Yellow River. The smaller one is 42.54 m long, 31.55 m wide and 0.63 m high and the larger one is 58.30 m long, 46.24 m wide and 0.16 m high. These structures can be divided into three parts: the main body belt, the transitional belt and the vanishing belt accord- ing to the geometrical characters and the kinematical elements. Some larger collapsed blocks, which are 20 - 30 cm wide, 2-3 m long and 40 - 60 cm high and with the shape of arc-slice, dominate in the main body belt whose length is 8 - 15 m, what is more, the collapsed slots are open or filled with the silt in the main body of these structures.The 10-20 m long transitional belt, with the character of moderate collapsed blocks whose dimensions are 5 - 20 cm wide, 0.5 - 2m long and 20 - 40 cm high has the same shape of arc-slice as the main body belt, but the slots are somehow different because some are half-open and others are stuffed with the silt. It is important that the relative movement directions of the collapsed blocks have a change here, i.e. from the sere one-way movement to the relative movement. The relative glides with the circle center of a big radial cavity, which are formed by the associate erosive grooves' gathering, contribute to this kind of ring-like collapsed and slippery structures. The 15 - 30 m long vanishing belt which is located beyond the area of the transitional belt, is characterized by the decreasing of the block' s dimension as well as the displacement space of the slide of blocks.The structures studied here are developed in a horizontal surface with the collapse gradient of 0.745 degree, and they are developed and accomplished in a "domino" manner. Some factors such as the liability to liquefaction of the fine sediments made up of silts and muddy-silts, the supersaturated pore water due to sudden and sharp rising or falling level of the Yellow River and the seepage water formed by the special configurations of the Luokou point bar, all contributed to the development of the slump structures.
【Fund】: 国家自然科学基金项目(4999 72037);; 高校博士点基金(20014 250042005 0425515);; 山东省自然科学基金项目(Q99E01)联合资助成果
【CateGory Index】: P548.2
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【Citations】
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【Co-citations】
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1 ZHANG Changmin;WANG Xulong;YIN Taiju;ZHU Rui;QU Jianhua;GUO Xudong;SUN Ping;Geosciences School of Yangtze University;PetroChina Xinjiang Oilfield Company;CNPC Consultancy Center;;Characteristics and Formation Mechanism of Ice Slide Structures on the Coast of Ulungur Lake,Xinjiang[J];地质论评;2017-01
2 ZHOU Zhongfa;ZHANG Shaoyun;CAO Mingda;ZHANG Qiang;XIE Yating;School of Karst Science,Guizhou Normal University;State Engineering Technology Institute for Karst Desertification Control;;Formation and Development of Cavern Potholes in Karst Region[J];山地学报;2016-06
3 ZHANG Ju;HE Zhenfang;DONG Jie;DENG Huanguang;LU Changjuan;GUO Na;School of Environment and Planning, Liaocheng University;;Spatial Distribution and Pollution Assessment of Heavy Metals in the Surface Sediments of Dongping Lake[J];生态环境学报;2016-10
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【Secondary Citations】
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