LIU Wentao, SHI Yaohong, ZHANG Xuhui, ZENG Ningfeng, YANG Jiangping, HE Haijun. GEOTECHNICAL FEATURES OF THE SEABED SOILS IN THE EAST OF XISHA TROUGH AND THE MECHANICAL PROPERTIES OF GAS HYDRATE-BEARING FINE DEPOSITS[J]. Marine Geology & Quaternary Geology, 2014, 34(3): 39-47. DOI: 10.3724/SP.J.1140.2014.03039
Citation: LIU Wentao, SHI Yaohong, ZHANG Xuhui, ZENG Ningfeng, YANG Jiangping, HE Haijun. GEOTECHNICAL FEATURES OF THE SEABED SOILS IN THE EAST OF XISHA TROUGH AND THE MECHANICAL PROPERTIES OF GAS HYDRATE-BEARING FINE DEPOSITS[J]. Marine Geology & Quaternary Geology, 2014, 34(3): 39-47. DOI: 10.3724/SP.J.1140.2014.03039
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GEOTECHNICAL FEATURES OF THE SEABED SOILS IN THE EAST OF XISHA TROUGH AND THE MECHANICAL PROPERTIES OF GAS HYDRATE-BEARING FINE DEPOSITS

  • 1. MLR Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geological Survey, Guangzhou 510075, China;

  • 2. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

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  • Received Date: June 20, 2013
  • Revised Date: January 13, 2014
    Graphical Abstract
    • Abstract
  • In order to define the geotechnical features of the seabed soil and the mechanical properties of the hydrate-bearing fine deposits, soil testing was carried out for the gravity cores recovered from the east of the Xisha trough in 2012 in addition to the mechanical experiments of tetrahydrofuran (THF) hydrate in the fine deposits taking from the northern slope of the South China Sea. Results show that the seabed soil of the investigation area is simply composed of elastic silt (MH). There are significant differences in geotechnical features of the seabed soil among the northern slope of the continent, the northern slope of the trough, the trough plain and the southern slope of the trough. The fine soil with different hydrate saturation is also very different in geotechnical features. The soil with low hydrate saturation has twice of plastic failure, while the soil with high hydrate saturation has only once. As the hydrate saturation increases, the cohesion of hydrate-bearing fine soil increases first, then decreases. However, the angle of internal friction doesn't change distinctly.
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    • References (12)
  • [1]
    郑志昌,陈俊仁,朱照宇.南海海底土体物理力学特征及其地质环境初步研究[J].水文地质工程地质,2004(4):50-53.[ZHENG Zhichang, CHEN Junren, ZHU Zhaoyu.Physical and mechanical characteristics of seabed soils and its geological environment in South China Sea[J].Hydrogeology and Engineering Geology,2004

    (4):50-53.]
    [2]
    牛作民.南海海底细粒土的工程地质性质基本特征[J].海洋地质与第四纪地质,1992,12(1):15-25.

    [NIU Zuomin.Engineering geological properties of fine soil in the seafloor of the South China Sea[J].Marine Geology and Quaternary Geology,1992,12(1):15-25.]
    [3]
    卢博.东沙群岛海域沉积物及其物理学性质的研究[J].海洋学报,1996,18(6):82-89.

    [LU Bo.Study on sediment and its properties in Dongsha Islands[J].Acta Oceanologica Sinica,1996,18(6):82-89.]
    [4]
    刘方兰,吴庐山.西沙海槽海域地形地貌特征及成因[J].海洋地质与第四纪地质,2006,26(3):7-14.

    [LIU Fanglan,WU Lushan.Topographic and morphologic characteristics and genesis analysis of Xisha Trough Sea Area in the South China Sea[J]. Marine Geology and Quaternary Geology,2006,26(3):7-14.]
    [5]
    高大钊.土力学可靠性原理[M]. 北京:中国建筑工业出版社,1989:1-12.[GAO Dazhao.Principles of the Reliability of Soil Mechanics[M].Beijing:China Architecture & Building Press,1989:1

    -12.]
    [6]
    张晓飞,陈坚,徐勇航,等.南海北部西侧海域粘土矿物的含量分布特征及来源分析[J].台湾海峡,2012,31(2):268-276.

    [ZHANG Xiaofei,CHEN Jian,XU Yonghang,et al.Distribution characteristics and source analysis of clay minerals contents in surface sediments of the northwestern South China Sea[J].Journal of Oceanography in Taiwan Strait,2012,31(2):268-276.]
    [8]
    汪荣鑫.数理统计[M].西安:西安交通大学出版社,1986:82-96.[WANG Rongxin.Mathematical Statistics[M].Xi'an:Xi'an Jiaotong University Press,1986:82

    -96.]
    [9]
    Yang X Q, Friedrich H, Wu H Y, et al. Geomagnetic paleointensity dating of South China Sea sediments for the last 130 kyr[J]. Earth and Planetary Science Letters,2009,284:258-266.
    [10]
    蔡观强,彭学超,陈鸿君,等.南海西沙海槽83PC柱状沉积物组成特征及其古环境意义[J].海洋地质与第四纪地质,2012,32(2):77-84.

    [CAI Guanqiang, PENG Xuechao, CHEN Hongjun, et al.The component characteristics and paleoenvironmental significances for sediments in core 83PC from the Xisha trough, South China Sea[J].Marine Geology and Quaternary Geology,2012,32(2):77-84.]
    [11]
    陈欣树,包砺彦,陈俊仁,等.珠江口外陆架晚第四纪最低海面的发现[J].热带海洋,1990,9(4):73-77.

    [CHEN Xinshu, BAO Liyan, CHEN Junren, et al.Discovery of lowest sea level in late quaternary at the continental shelf off Pearl River mouth[J].Tropic Oceanology, 1990,9(4):73-77.]
    [12]
    朱袁智,王有强,赵焕庭,等.南沙群岛永暑礁第四纪珊瑚礁成岩作用与海平面变化关系[J].热带海洋,1994,13(2):1-8.

    [ZHU Yuanzhi, WANG Youqiang, ZHAO Huanting, et al.The relationship between diagenesis of Quaternary coral reef of Yongshu reef in Nansha islands and sea level changes[J].Tropic Oceanology, 1994,13(2):1-8.]
    [13]
    姚衍桃,Jan Harff,Michael Meyer,等.南海西北部末次盛冰期以来的古海岸线重建[J].中国科学D辑:地球科学,2009,39(6):753-762.

    [YAO Yantao, Jan Harff, Michael Meyer, et al. Reconstruction of paleocoastlines for the northwestern South China Sea since the Last Glacial Maximum[J]. Science in China Series:D-Earth Science, 2009,39(6):753-762.]
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