Sedimentary distribution and evolution of sedimentary environment in the tidal sand ridges and troughs west of Taiyangsha Ridge in the southern Yellow Sea

doi:10.3969/j.issn.1001-909X.2015.02.006

Abstract

Abstract: Sediment survey was carried out in the tidal sand ridges and troughs west of Taiyangsha Ridge in the southern Yellow Sea. Samples were taken with vibrating piston sampler in dense stations. Based on results of grain size analyses, the space distribution characteristics of the surface and shallow sediments with thickness some 2~3 m were elaborately studied. The results show that fine sands of the surface sediments mainly distribute on the tidal sand ridges and coast beach, while other finer sediment types mainly distribute in tidal troughs, appearing a basic feature of sediment-morphology pattern of “ridge-sand and trough-soil”. Meanwhile, the distribution scope of the surface fine sands on the tidal sand ridges is clearly related to the distance between the ridges and the coast. Apart from the influence of tidal currents, this is mainly due to the wave energy consumption by the outer ridges. Based on the above characteristics of sediment-morphology pattern, evolution of sedimentary environment was also discussed.

Key words: tidal sand ridges, tidal troughs, sedimentary distribution, evolution of sedimentary environment, the southern Yellow Sea

CLC Number:

P736.21

LIU A-cheng, LU Qi, WANG Bai-shun, ZHANG Jie. Sedimentary distribution and evolution of sedimentary environment in the tidal sand ridges and troughs west of Taiyangsha Ridge in the southern Yellow Sea[J]. Journal of Marine Sciences, 2015, 33(2): 40-46.

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