A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea

XIAO Shang-bin; LI An-chun

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Article Navigation > Acta Sedimentologica Sinica > 2005 > 23(1): 122-129

XIAO Shang-bin, LI An-chun. A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea[J]. Acta Sedimentologica Sinica, 2005, 23(1): 122-129.

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XIAO Shang-bin, LI An-chun. A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea[J]. Acta Sedimentologica Sinica, 2005, 23(1): 122-129.

A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea

XIAO Shang-bin^1,2,
LI An-chun¹

1.
Institute of Oceanology, Chinese Academy Sciences, Qingdao Shandong 266071;
2.
South China Sea Institute of Oceanology, Guangzhou 510301

Received Date: 2004-02-13
Rev Recd Date: 2004-10-09
Publish Date: 2005-03-10

Abstract

Grain-size distribution of 149 sediment samp les of Core DD2 and 3 suspended sediment samp les, pretreated by removing the organic matter and carbonate, are measured by use ofMalvern 2000. The samp ling sites are located in the inner shelf of the East China Sea. Vertical distribution of grain-size parameters of Core DD2 is studied. Standard deviations are calculated for all 149 samp les. Two peaks are observed in plot standard deviation values vs.grain-size classes, at about 19 and 130μm grain size, respectively. They are environmentally sensitive grain-size population. And about 19μm is sensitive to coastal current of the East China Sea, the other is to storm current. Each of these size classes rep resents a population of grainswith the highest variability through time. Vertical contents of sensitive grain-size population are carried out. It shows that the sedimentations of upper Core DD2 was controlled by coastal current and was in relatively stable environment. This result is supported by the comparison analysis between the modern suspended sediments and Core DD2. And lower part was controlled by combination of coastal and storm currents and was in unstable environment.
- grain-size population,
- terrigenousmatter,
- inner shelf of the East China Sea

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沈阳化工大学材料科学与工程学院沈阳 110142

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A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea

1. Institute of Oceanology, Chinese Academy Sciences, Qingdao Shandong 266071;

2. South China Sea Institute of Oceanology, Guangzhou 510301

Received Date: 2004-02-13

Rev Recd Date: 2004-10-09

Publish Date: 2005-03-10

Key words:

Abstract: Grain-size distribution of 149 sediment samp les of Core DD2 and 3 suspended sediment samp les, pretreated by removing the organic matter and carbonate, are measured by use ofMalvern 2000. The samp ling sites are located in the inner shelf of the East China Sea. Vertical distribution of grain-size parameters of Core DD2 is studied. Standard deviations are calculated for all 149 samp les. Two peaks are observed in plot standard deviation values vs.grain-size classes, at about 19 and 130μm grain size, respectively. They are environmentally sensitive grain-size population. And about 19μm is sensitive to coastal current of the East China Sea, the other is to storm current. Each of these size classes rep resents a population of grainswith the highest variability through time. Vertical contents of sensitive grain-size population are carried out. It shows that the sedimentations of upper Core DD2 was controlled by coastal current and was in relatively stable environment. This result is supported by the comparison analysis between the modern suspended sediments and Core DD2. And lower part was controlled by combination of coastal and storm currents and was in unstable environment.

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A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea

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