GRAIN SIZE OF SURFACE SEDIMENTS IN THE EASTERN MIN-ZHE COAST: AN INDICATOR OF SEDIMENTARY ENVIRONMENTS

HUANG Long; ZHANG Zhixun; GENG Wei; WANG Zhongbo; LU Kai; LI Yang

doi:10.3724/SP.J.1140.2014.06161

2014 Vol. 34, No. 6

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HUANG Long, ZHANG Zhixun, GENG Wei, WANG Zhongbo, LU Kai, LI Yang. GRAIN SIZE OF SURFACE SEDIMENTS IN THE EASTERN MIN-ZHE COAST: AN INDICATOR OF SEDIMENTARY ENVIRONMENTS[J]. Marine Geology & Quaternary Geology, 2014, 34(6): 161-169. doi: 10.3724/SP.J.1140.2014.06161

Citation:

HUANG Long, ZHANG Zhixun, GENG Wei, WANG Zhongbo, LU Kai, LI Yang. GRAIN SIZE OF SURFACE SEDIMENTS IN THE EASTERN MIN-ZHE COAST: AN INDICATOR OF SEDIMENTARY ENVIRONMENTS[J]. Marine Geology & Quaternary Geology, 2014, 34(6): 161-169. doi: 10.3724/SP.J.1140.2014.06161

GRAIN SIZE OF SURFACE SEDIMENTS IN THE EASTERN MIN-ZHE COAST: AN INDICATOR OF SEDIMENTARY ENVIRONMENTS

1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071;
2. Key Laboratory of Coastal Wetland Biogeosciences, China Geological Survey, Qingdao 266071;
3. Qingdao Institute of Marine Geology, Qingdao 266071

Received Date: 15 September 2014

Revised Date: 03 November 2014

Abstract

Abstract

The grain size of the 83 surface sediment samples taken from the eastern Min-Zhe coast are studied for sediment types and the distribution pattern of grain size parameters. The effect of sediment source and hydrodynamic conditions on the sediment distribution pattern is discussed. The following results have been achieved based on the detailed study of these samples:(1)There are six types of sediment in the study area and they are sand, silty sand, muddy sand, sandy silt, silt and mud. (2)The mean grain size is in a range of 2.01~7.58 φ, and the grains are coarsening seaward with the increase in sand and decrease in silt and mud. (3)The standard deviation varies between 0.48~2.86 φ. It shows a poor sorting in the whole study area and the lowest is in the middle of the study area, and from there the sorting is improved eastward and westward. (4)The inshore fine sediments are from the Yangtze River and other coastal rivers, and the offshore coarse sediments are the reworked relict deposits on shelf. Both the coastal current along the Min-Zhe coast and the Kuroshio current contribute to the distribution of sediments. Based on the data, the Min-Zhe coast is divided into three depositional zones, i.e. the inshore muddy zone, multi-sediments zone in the middle and eastern Min-Zhe coast and offshore reworked sand zone on the outer shelf.
- surface sediments /
- grain size /
- depositional environment /
- the eastern of min-zhe coast

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References

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