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

热带海洋学报 ›› 2016, Vol. 35 ›› Issue (3): 48-54.doi: 10.11978/2015102CSTR: 32234.14.2015102

琼东南外海海底沉积物粒度组分对孔隙度、声速的影响

田雨杭^{1, 2}, 陈忠¹, 刘吉睿³, 黄蔚霞¹, 仲义^{1, 2}

1. 中国科学院南海海洋研究所, 中国科学院边缘海地质重点实验室, 广东广州 510301;
2. 中国科学院大学, 北京 100049;
3. 北京信息科技大学, 北京 100192

收稿日期:2015-07-29 出版日期:2016-05-29 发布日期:2016-05-27
通讯作者: 陈忠(1970—), 男。E-mail: chzhsouth@scsio.ac.cn
作者简介:田雨杭(1987—), 男, 黑龙江齐齐哈尔市人, 硕士研究生, 主要从事海洋沉积物声学研究。E-mail: tyh@scsio.ac.cn
基金资助:
国家自然基金重点项目(91128206); 国家自然基金面上项目(41376057); 国家科技支撑计划项目(2014BAB14B01)

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

TIAN Yuhang^{1, 2}, CHEN Zhong¹, LIU Jirui³, HUANG Weixia¹, ZHONG Yi^{1, 2}

1. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Beijing Information Science and Technology University, Beijing 100192, China

Received:2015-07-29 Online:2016-05-29 Published:2016-05-27
Contact: Chen Zhong. E-mail: chzhsouth@scsio.ac.cn
Supported by:
State Key Program of the National Natural Science Foundation of China (91128206); National Natural Science Foundation of China (41376057); National High Technology Research and Denelopment Program of China (2014BAB14B01)

摘要/Abstract

摘要： 海底沉积物粒度组分影响和控制着沉积物的声学特性和物理性质, 具有明显的区域性特点。文章测定了琼东南外海海底沉积物的声速、孔隙度以及沉积物粒度组成,讨论了他们的相互关系。琼东南外海海底沉积物纵波波速变化范围为1455~1773m•s^-1, 由琼东南外海的东北至南部海域, 可分别划分为低声速沉积物区、高声速沉积物区、低声速沉积物区和高声速沉积物区。沉积物孔隙度回归方程和声波回归方程表明,沉积物类型从砂、粉砂质砂、黏土质粉砂、砂-粉砂-黏土到粉砂质黏土变化, 声速总体呈减小的趋势, 孔隙度呈明显的增大趋势。

关键词: 沉积物, 粒度组分, 孔隙度, 声速, 琼东南外海

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

中图分类号:

P736.211

田雨杭, 陈忠, 刘吉睿, 黄蔚霞, 仲义. 琼东南外海海底沉积物粒度组分对孔隙度、声速的影响[J]. 热带海洋学报, 2016, 35(3): 48-54.

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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琼东南外海海底沉积物粒度组分对孔隙度、声速的影响

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

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