Sedimentation characteristics of surficial sediments in Baiyun Canyon area, Northern South China Sea

IF 2.1 3区 地球科学 Q2 OCEANOGRAPHY Continental Shelf Research Pub Date : 2024-10-20 DOI:10.1016/j.csr.2024.105342
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Abstract

The Baiyun Canyon area on the Northern Slope of the South China Sea is a potential hotspot for oil and gas resource development, but the sediment characteristics and sedimentary environment in this region present challenges for offshore engineering. This study comprehensively analyzed the physical, and mechanical properties of sediments in the area using geophysical exploration, engineering geological investigation, fixed-point sampling and hydrological observation. The engineering geological characteristics and sedimentary environment of surface sediments in the Baiyun Canyon area were studied, and the relationship between physical and mechanical properties and sedimentary environment was explored. The study revealed that the sediments in this area consist mainly of organic soft clay with high water content, low density, high pore ratio, high liquid limit, high plasticity and low strength. The physical and mechanical properties of the sediments vary, with the mechanical properties exhibiting higher variability than the physical properties. The research findings offer a scientific basis for understanding the seabed soil properties for designing submarine engineering structures in the deep waters of the northern South China Sea. This study holds significant theoretical and practical implications for oil and gas exploration and offshore engineering construction.
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南海北部白云峡谷地区表层沉积物的沉积特征
南海北坡白云峡谷地区是潜在的油气资源开发热点,但该地区的沉积特征和沉积环境给海洋工程带来了挑战。本研究采用地球物理勘探、工程地质调查、定点取样和水文观测等方法,全面分析了该地区沉积物的物理力学性质。研究了白云峡谷地区表层沉积物的工程地质特征和沉积环境,探讨了物理力学性质与沉积环境之间的关系。研究表明,该地区沉积物主要由有机软粘土组成,具有高含水率、低密度、高孔隙比、高液限、高塑性和低强度等特点。沉积物的物理和机械特性各不相同,其中机械特性的变异性高于物理特性。研究结果为了解海底土壤性质提供了科学依据,有助于设计南海北部深海水域的海底工程结构。这项研究对油气勘探和海洋工程建设具有重要的理论和实践意义。
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来源期刊
Continental Shelf Research
Continental Shelf Research 地学-海洋学
CiteScore
4.30
自引率
4.30%
发文量
136
审稿时长
6.1 months
期刊介绍: Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.
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