Sedimentary dynamics and material source in Yangma Island sea area in Yantai based on grain size end-member model

TANG Shikai; LI Hengjian; QIANG Menglin; LI Yihong; SUN Shaoze; YIN Tao; YU Linhong

doi:10.16562/j.cnki.0256-1492.2024061201

2025 Vol. 45, No. 3

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Article navigation > Marine Geology & Quaternary Geology > 2025 > 45(3): 62-71

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TANG Shikai, LI Hengjian, QIANG Menglin, LI Yihong, SUN Shaoze, YIN Tao, YU Linhong. Sedimentary dynamics and material source in Yangma Island sea area in Yantai based on grain size end-member model[J]. Marine Geology & Quaternary Geology, 2025, 45(3): 62-71. doi: 10.16562/j.cnki.0256-1492.2024061201

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TANG Shikai, LI Hengjian, QIANG Menglin, LI Yihong, SUN Shaoze, YIN Tao, YU Linhong. Sedimentary dynamics and material source in Yangma Island sea area in Yantai based on grain size end-member model[J]. Marine Geology & Quaternary Geology, 2025, 45(3): 62-71. doi: 10.16562/j.cnki.0256-1492.2024061201

Sedimentary dynamics and material source in Yangma Island sea area in Yantai based on grain size end-member model

1.
Marine Geological Exploration Institute of Shandong Province, Yantai 264004, China
2.
No.3 Exploration Institute of Geology and Mineral Resources of Shandong Province, Yantai 264004, China

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Corresponding author: YIN Tao, 397921601@qq.com

Received Date: 12 June 2024

Revised Date: 06 September 2024

Publish Date: 28 June 2025

Abstract

Abstract

Based on the grain size test data of 30 surface sediments in Yangma Island sea area in Bohai Sea, Yantai, the grain size parameters were calculated and end members were specified. The sedimentary dynamic environment and material source of sediments were analyzed by combining regional hydrodynamics and shoreline types. Results show that the average grain size (Φ) of the marine sediment gradually increased from river estuary off coast seaward, from moderately to poorly sorted, the skewness turned extremely positive, and the kurtosis was from mesokurtic to leptokurtic. Four single-peak end-member components were recognized from the grain size data, namely, EM1, EM2, EM3, and EM4 in the size ranges of 2.75～8.75, 3.00～6.25, 2.25～4.25, and 1.50～3.75, respectively. The EM1 represented a sedimentary environment in deep water and weak hydrodynamics, and the source of the material was the fine-grained material from Yellow River carried out by the Yellow Sea littoral currents. The EM2 end-member represented a weak hydrodynamic sedimentary environment under the effect of tidal wave superposition, and the material source was the mixture of Yellow River inlet sediment carried by the Yellow Sea littoral current and the debris produced by seawater erosion of bedrock coast. The EM3 end-member represented the sedimentary environment with strong hydrodynamic force under the influence of tidal current, wave superposition and channel, and the material source was the debris produced by the inlet river-carried sediments and the mix of seawater erosion of sand and mud coast. The EM4 end-member represented a strong hydrodynamic sedimentary environment under the joint action of seawater and river hydrodynamics, and the source of material was the sediment carried by the river into the sea, mixed with the sand and mud coast eroded by seawater, and the debris that generated from human activities.
- surface sediments /
- grain-size parameters /
- end-member analysis /
- sedimentary dynamics /
- Yangma Island sea area

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References

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