琼东南外海海底沉积物粒度组分对孔隙度、声速的影响

doi:10.11978/2015102

Abstract

Abstract: Acoustic and physical properties of surficial marine sediments are mainly influenced by the grain size and show obvious regional variations. This study was conducted on the mutual relationship between the parameters of offshore sediments in the southeastern Hainan Island by measuring the sound velocity, porosity and grain size. The results exhibited that the compression wave velocity of the seafloor sediment was variable between 1455 m•s^-1 and 1773 m•s^-1. From the northeast to the southwest in this study area, the wave velocity of seabed sediments decreased and four zones with different sound-velocity could be divided. The regression analyses showed that the grain size had a negative relationship with the porosity and positive relationship with the sound velocity. The finer sediments had larger porosity and lower sound velocity.

Key words: seafloor sediment, grain size, porosity, sound velocity, offshore of southeastern Hainan Island

CLC Number:

P736.211

TIAN Yuhang, CHEN Zhong, LIU Jirui, HUANG Weixia, ZHONG Yi. Influence of the grain size on the porosity and acoustic velocity of offshore surface sediments in the Southeastern Hainan Island[J].Journal of Tropical Oceanography, 2016, 35(3): 48-54.

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Influence of the grain size on the porosity and acoustic velocity of offshore surface sediments in the Southeastern Hainan Island

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