VARIATION IN GRAIN-SIZE DISTRIBUTION PATTERN OF THE SOUTHEASTERN LIAODONG BAY AND ITS IMPACT FACTORS

ZHAO Jingtao; HU Bangqi; LI Jun; BAI Fenglong; XU Donghao; LI Guogang; ZHANG Xianrong

doi:10.3724/SP.J.1140.2013.06019

Marine Geology & Quaternary Geology > 2013 > 33(6): 19-27. > DOI: 10.3724/SP.J.1140.2013.06019

ZHAO Jingtao, HU Bangqi, LI Jun, BAI Fenglong, XU Donghao, LI Guogang, ZHANG Xianrong. VARIATION IN GRAIN-SIZE DISTRIBUTION PATTERN OF THE SOUTHEASTERN LIAODONG BAY AND ITS IMPACT FACTORS[J]. Marine Geology & Quaternary Geology, 2013, 33(6): 19-27. DOI: 10.3724/SP.J.1140.2013.06019

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VARIATION IN GRAIN-SIZE DISTRIBUTION PATTERN OF THE SOUTHEASTERN LIAODONG BAY AND ITS IMPACT FACTORS

1. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, China;
2. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
3. College of Earth Sciences, Jilin University, Changchun 130061, China;
4. Marine Engineering and Prospecting Institute of North China Sea, SOA, Qingdao 266033, China

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Received Date: September 09, 2012
Revised Date: December 21, 2012

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Abstract

Abstract

Based on the lithology and grain-size parameters of the two piston cores(LDC30 and LDC25),we studied the changes in sedimentary environment and provenance of the southeastern Liaodong Bay since early Holocene.The lithology and grain-size parameters of the two cores display two step variations,and the sand content and mean grain-size of the upper layers are obviously larger than that in the lower parts.It suggests that the lower section of the sediments is mainly deposited under a nearshore shallow marine environment during the early Holocene transgression,whereas the upper section deposited in the tidal environment since the highest sea level stand (~7 kaBP).The sediment provenance of these two sections in the piston cores is also different with each other,under the control of sedimentary environment changes caused by sea level fluctuation and the terrigenous input variation related to the East Asian summer monsoon.
- grain-size,
- tidal deposits,
- sea-level change,
- Liaodong Bay

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References

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VARIATION IN GRAIN-SIZE DISTRIBUTION PATTERN OF THE SOUTHEASTERN LIAODONG BAY AND ITS IMPACT FACTORS