| A preliminary study on fingerprinting approach in marine sediment dynamics with the rare earth elements |
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| 作者姓名： | ZHOU Xiaojing LI Anchun JIANG Fuqing MENG Qingyong |
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| 作者单位： | ZHOU Xiaojing,MENG Qingyong(Key Laboratory of Marine Geology & Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Graduate School of the Chinese Academy of Sciences,Beijing 100039,China);LI Anchun,JIANG Fuqing(Key Laboratory of Marine Geology & Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China) |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 40776030, 40576032, and 40506016. |
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| 摘 要： | Locating the quantitized natural sediment fingerprints is an important work for marine sediment dynamics study.The total of 146 sediment samples were collected from the Shelf of the East China Sea and five rivers,including Huanghe (Yellow),Changjiang (Yangtze),Qiantang,Ou and Min River.The sediment grain size and the contents of rare earth elements (REEs) were measured with laser particle size analyzer and ICP-MS technology.The results show that absolute REE content (ΣREE) and the concentration ratio of light REEs to heavy REEs (L/HREE) are different in the sediments among those rivers.There are higher REE contents in being less than 2 m and 2–31 μm fractions in the Changjiang Estuary surface sediments.The REE contents of bulk sediment are dominated by the corresponding values of those leading size-fractions.REE of sediment is higher close to the estuaries and declines seaward on the inner shelf of the East China Sea (ECS).The L/HREE ratio has a tendency of increase southward from 28 ? N.Hydrodynamic conditions plays a predominate role on spacial distributions of the surficial sediment’s REE parameters.In some situations,the currents tend to remove the coarser light grains from initial populations,as well as the deposit of the finer heavy mineral grains.In other situations,the currents will change the ratio of sediment constituents,such as ratio between silts and clays in the sediments.As a result,the various values of REE or L/HREE ratio in different bulk sediments are more affected by the change of size-fractions than source location.Under the long-term stable hydrodynamic environment,i.e.,the East China Sea Shelf,new sediment transport model based on the size and density gradation concept may help to understand the spatial distribution patterns of REE parameters.
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| 关 键 词： | 海洋沉积动力学 重稀土元素 指纹 沉积物粒度 空间分布格局 激光粒度分析仪 表层沉积物 元素含量 |
| 收稿时间： | 2009/5/26 0:00:00 |
| 修稿时间： | 9/1/2009 12:00:00 AM |
A preliminary study on fingerprinting approach in marine sediment dynamics with the rare earth elements |
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| ZHOU Xiaojing,LI Anchun,JIANG Fuqing,MENG Qingyong.A preliminary study on fingerprinting approach in marine sediment dynamics with the rare earth elements[J].Acta Oceanologica Sinica,2010,29(4):62-77. |
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| Authors: | ZHOU Xiaojing LI Anchun JIANG Fuqing and MENG Qingyong |
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| Institution: | 1. Key Laboratory of Marine Geology & Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Graduate School of the Chinese Academy of Sciences,Beijing 100039,China
2. Key Laboratory of Marine Geology & Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China |
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| Abstract: | Locating the quantitized natural sediment fingerprints is an important work for marine sediment dynamics study. The total
of 146 sediment samples were collected from the Shelf of the East China Sea and five rivers, including Huanghe (Yellow), Changjiang
(Yangtze), Qiantang, Ou and Min River. The sediment grain size and the contents of rare earth elements (REEs) were measured
with laser particle size analyzer and ICP-MS technology. The results show that absolute REE content (ΣREE) and the concentration
ratio of light REEs to heavy REEs (L/HREE) are different in the sediments among those rivers. There are higher REE contents
in being less than 2 m and 2–31 μm fractions in the Changjiang Estuary surface sediments. The REE contents of bulk sediment
are dominated by the corresponding values of those leading size-fractions. ΣREE of sediment is higher close to the estuaries
and declines seaward on the inner shelf of the East China Sea (ECS). The L/HREE ratio has a tendency of increase southward
from 28°N. Hydrodynamic conditions plays a predominate role on spacial distributions of the surficial sediment’s REE parameters.
In some situations, the currents tend to remove the coarser light grains from initial populations, as well as the deposit
of the finer heavy mineral grains. In other situations, the currents will change the ratio of sediment constituents, such
as ratio between silts and clays in the sediments. As a result, the various values of ΣREE or L/HREE ratio in different bulk
sediments are more affected by the change of size-fractions than source location. Under the long-term stable hydrodynamic
environment, i.e., the East China Sea Shelf, new sediment transport model based on the size and density gradation concept
may help to understand the spatial distribution patterns of REE parameters. |
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| Keywords: | rare earth elements fingerprints East China Sea Shelf sediment transport |
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