A study on seafloor sediment and its acouso-physical properties in the southeast offshore sea area of Hainan Island in China

LU Bo; LI Gan-xian; LIU Qiang; HUANG Shao-jian; ZHANG Fu-sheng

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Article Navigation > Haiyang Xuebao > 2007 > 29(4): 34-42

LU Bo, LI Gan-xian, LIU Qiang, HUANG Shao-jian, ZHANG Fu-sheng. A study on seafloor sediment and its acouso-physical properties in the southeast offshore sea area of Hainan Island in China[J]. Haiyang Xuebao, 2007, 29(4): 34-42.

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A study on seafloor sediment and its acouso-physical properties in the southeast offshore sea area of Hainan Island in China

1.
Key Laboratory of Marginal Sea Geology of Chinese Academy of Sciences, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301

Received Date: 2006-09-05
Rev Recd Date: 2006-12-04

Abstract

Abstract

Acouso-physical properties of seafloor sediments in the southeast offshore sea area of Hainan Island at the northern continental shelf of South China Sea are analyzed.In many cruises CTD measurements of seawater,measurments of shallow stratum and side-scan sonar have been made.Acoustic parameters, basic sedimentary parameters,physico-mechanical parameters and ¹⁴C age,etc.have been measured.Sedi-menteastic parameters,including Young's modulus,bulk modulus,constrained modulus,rigidity modulus,Poisson's ratio,Lames constant,etc.,have been calculated.Results show that the compression wave velocity of the seafloor sediment in the sea area ranges from 1.474 to 1.700 km/s,and there are high and low sound velocity sediment types in the different sea areas;the shear wave velocity is 150~600 m/s;at 100 kHz the sediment sound attenuation is 35~260 dB/m,the sediment density is 1.4~2.0 g/cm³;the sediment porosity is 42%~88%.Sound field parameters and describing sound reciprocity between sea and seafloor are described.
- South China Sea,
- southeast offshore of Hainan Island in China,
- seafloor sediment,
- acoustic parameters,
- acouso-physical properties

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References(16)

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