Spatial variability of different silt components and its sedimentary significance offshore Shandong Peninsula

Li Jun; Hu Bangqi; Li Guogang; Wang Libo; Bai Fenglong; Zhao Jingtao; Zou Liang; Dou Yanguang

doi:10.3969/j.issn.0253-4193.2017.01.007

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Li Jun, Hu Bangqi, Li Guogang, Wang Libo, Bai Fenglong, Zhao Jingtao, Zou Liang, Dou Yanguang. Spatial variability of different silt components and its sedimentary significance offshore Shandong Peninsula[J]. Haiyang Xuebao, 2017, 39(1): 64-75. doi: 10.3969/j.issn.0253-4193.2017.01.007

Citation:

Li Jun, Hu Bangqi, Li Guogang, Wang Libo, Bai Fenglong, Zhao Jingtao, Zou Liang, Dou Yanguang. Spatial variability of different silt components and its sedimentary significance offshore Shandong Peninsula[J]. Haiyang Xuebao, 2017, 39(1): 64-75. doi: 10.3969/j.issn.0253-4193.2017.01.007

Citation:

Li Jun, Hu Bangqi, Li Guogang, Wang Libo, Bai Fenglong, Zhao Jingtao, Zou Liang, Dou Yanguang. Spatial variability of different silt components and its sedimentary significance offshore Shandong Peninsula[J]. Haiyang Xuebao, 2017, 39(1): 64-75. doi: 10.3969/j.issn.0253-4193.2017.01.007

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Spatial variability of different silt components and its sedimentary significance offshore Shandong Peninsula

doi: 10.3969/j.issn.0253-4193.2017.01.007

1.
Key Laboratory of Marine Hydrocarbon Geology and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, China;Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Sciences and Technology, Qingdao 266071, China
2.
Key Laboratory of Marine Hydrocarbon Geology and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, China
3.
Marine Enginering and Prospecting Institute of North China Sea, State Oceanic Administration, Qingdao 266033, China

Received Date: 2016-04-10
Rev Recd Date: 2016-07-25

Abstract

Abstract

To achieve a more robust understanding of the transport pattern of silt components in offshore areas, the grain size characteristics of 783 surface samples of fine-grained sediments are used to interpret the sediment transport pathways and predominant sedimentological conditions offshore the Shandong Peninsula, Yellow Sea. Based on the variation in the grain size composition, a regional "silt fractionation" was observed, and the very fine silt (VFSt) and the fine silt (FSt) displayed similar dynamic behaviors to that of the clay fraction during transportation and deposition, and these silts all acted as flocs. By contrast, the coarse silt (CSt) was primarily transported and deposited as single grains, indicating that the CSt content was the environmentally sensitive component in the sediments in the study area. The sediments displayed complicated sources based on the grain size analysis. In the northern part of the study area, the fine-grained sediment primarily originated from the Huanghe River Estuary (suspended or reworked, whereas in the eastern Shandong Peninsula, the sediments of the mud wedge were primarily composed of Huanghe-derived sediments and characterized by CSt-enriched, and in the southern Shandong Peninsula, the sediments primarily originated from the small rivers nearby. The marine fronts in the study area were thought to be the major factor controlling the settling and deposition of coarse silt. Further study should be carried out on the mechanisms that the fronts control the deposition of silty fractions in shelf settings.
- silt,
- spatial variability,
- grain size fractionation,
- oceanic fronts,
- offshore Shandong Peninsula

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References(35)

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