| Distribution and dispersal pattern of clay minerals in surface sediments, eastern Beibu Gulf, South China Sea |
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| 作者姓名： | LI Jun GAO Jianhu WANG Yaping LI Yan BAI Fenglong CEES Laban |
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| 作者单位： | [1]Qingdao Institute of Marine Geology, Qingdao 266071, China [2]MLR Key laboratory of marine resources and environments, Qingdao 266071, China [3]Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University,Nanjing 210093, China [4]Joint Key Laboratory of Coastal Study （XMU ＆ FJIO）, Xiamen University, Xiamen 361005, China [5]Deltares, AL Utrecht 3508, The Netherlands |
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| 摘 要： | Clay minerology of sediments are useful in determining distribution,sources and dispersal routes of fine-grained sediments.In the present paper,clay minerals of surface sediments throughout the eastern part of Beibu Gulf has been investigated to reveal sources and transport of detrital finegrained sediments.Four distinct clay mineral suites were observed from cluster analysis of clay mineral compositions of the samples.From the distribution pattern of clay minerals,we conclude that kaolinte in the eastern gulf is mainly derived from South China Landmass;Smectite could not be transported mainly by surface current from north-western Hainan Island,and maybe minor portion of it from Red River;Illite is mainly transported by the currents from South China Sea.Chlorite has two sources,namely South China Sea and South China Landmass.The Zhujiang River derived sediments could not be one of the sources for the clay mineral here,because of very different composition and ratios.The distribution pattern of clay minerals in the eastern Beibu Gulf is mainly controlled by fine-grained sediment source and local currents.The Silt/Clay,Smectite/Kaolinte,and Smetite/(Chlorite+Illite) ratios could be used as indicators of fine-grained sediment dispersal in the gulf.
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| 关 键 词： | 沉积物分布 粘土矿物 表层沉积物 南中国海 北部湾 扩散 矿物成分 分布格局 |
| 收稿时间： | 2010/12/1 0:00:00 |
| 修稿时间： | 2011/7/19 0:00:00 |
Distribution and dispersal pattern of clay minerals in surface sediments, eastern Beibu Gulf, South China Sea |
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| LI Jun,GAO Jianhu,WANG Yaping,LI Yan,BAI Fenglong,CEES Laban.Distribution and dispersal pattern of clay minerals in surface sediments, eastern Beibu Gulf, South China Sea[J].Acta Oceanologica Sinica,2012,31(2):78-87. |
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| Authors: | LI Jun GAO Jianhu WANG Yaping LI Yan BAI Fenglong and CEES Laban |
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| Affiliation: | 1.Qingdao Institute of Marine Geology, Qingdao 266071, China;MLR Key laboratory of marine resources and environments, Qingdao 266071, China2.Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing 210093, China3.Joint Key Laboratory of Coastal Study(XMU & FJIO), Xiamen University, Xiamen 361005, China4.Deltares, AL Utrecht 3508, The Netherlands |
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| Abstract: | Clay minerology of sediments are useful in determining distribution, sources and dispersal routes of fine-grained sediments. In the present paper, clay minerals of surface sediments throughout the eastern part of Beibu Gulf has been investigated to reveal sources and transport of detrital fine- grained sediments. Four distinct clay mineral suites were observed from cluster analysis of clay mineral compositions of the samples. From the distribution pattern of clay minerals, we conclude that kaolinte in the eastern gulf is mainly derived from South China Landmass; Smectite could not be transported mainly by surface current from north-western Hainan Island, and maybe minor portion of it from Red River; Illite is mainly transported by the currents from South China Sea. Chlorite has two sources, namely South China Sea and South China Landmass. The Zhujiang River derived sediments could not be one of the sources for the clay mineral here, because of very different composition and ratios. The distribution pattern of clay minerals in the eastern Beibu Gulf is mainly controlled by fine-grained sediment source and local currents. The Silt/Clay, Smectite/Kaolinte, and Smetite/(Chlorite+Illite) ratios could be used as indicators of fine-grained sediment dispersal in the gulf. |
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| Keywords: | clay minerals sediment source analysis sediment dispersal Beibu Gulf |
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