Characteristics and dynamics origin of the Lower Cretaceous sill in northern Beilaishi section of Lingshan Island,Shandong Province |
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Authors: | Zhong Jian-Hua Sun Ning-Liang Hao Bing Ni Liang-Tian Song Guan-Xian Xue Chun-Qi Mao Cui Shao Zhu-Fu Ge Yu-Zhu Chen Bin Liu Sheng-Xin Peng Chao-Feng Gu Dong-Hui Wang Yong-Qiang Li Cong |
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Institution: | 1.State Key Laboratory Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;2.School of Geosciences,China University of Petroleum(East China),Shandong Qingdao 266580,China;3.School of Earth Sciences,Northeast Petroleum University,Heilongjiang Daqing 163318,China;4.Institute for Geology,Mineralogy and Geophysics,Ruhr University,Bochum 44801,Germany |
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Abstract: | A lot of sand dikes are found in the Lower Cretaceous Laiyang Formation in northern Beilaishi section located in the Lingshan Island of Shandong Province. There are two types including bedding sand dikes and unbedding sand dikes based on their relationship with the bedding plane. The bedding sand dikes, which are often associated with soft sedimentary deformation, are mainly developed in the black mudstone of delta front, and their top and bottom interfaces are generally uneven. Based on the characteristics of sand dikes, the physical model and formula of bedding sand dikes under non-seismic condition are established. The relationship between the depth of liquefied sand layer, the emplacement depth and thickness of overlying sediment layer is deduced. It is considered that the depth of liquefied sand layer which forms large sand veins is very deep. This paper is of great significance in studying the origin of sand veins, lake related deposition and basin tectonic movement. |
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Keywords: | sand dikes dynamics Lower Cretaceous Lingshan Island |
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