Rare earth element fingerprints in Korean coastal bay sediments: Association with provenance discrimination
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Title
- Rare earth element fingerprints in Korean coastal bay sediments: Association with provenance discrimination
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Author(s)
- Kang, Jeongwon; Woo, Han Jun; Jang, Seok; Jeong, Kap-Sik; Jung, Hoi-Soo; Hwang, Ha Gi; Lee, Jun-Ho; Cho, Jin Hyung
- KIOST Author(s)
- Kang, Jeong Won(강정원); Woo, Han Jun(우한준); Jang, Seok(장석); Jung, Hoi Soo(정회수); Lee, Jun-Ho(이준호); Cho, Jin Hyung(조진형)
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Alternative Author(s)
- 강정원; 우한준; 장석; 정갑식; 정회수; 황하기; 이준호; 조진형
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Publication Year
- 2016-09
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Abstract
- Rare earth elements (REEs: La-Lu) in surface sediments collected from the mouth and middle tidal flats of Gomso Bay, South Korea, in August 2011 and May 2012 were analyzed to investigate the fine-grained sediment provenance. The upper continental crust (UCC)-normalized light REEs (LREEs: La to Nd) were more enriched than the middle REEs (MREEs: Sm to Dy) and heavy REEs (HREEs: Ho to Lu), resulting in large (La/Yb)(UCC) (1.9 +/- 0.4) to (Gd/Yb)(UCC) (1.4 +/- 0.2) ratios. The monthly (La/Yb)(UCC) values differed between the mouth and middle tidal flats due to deposition of fine-grained sediments that originated from distant rivers (the Geum and Yeongsan) and the Jujin Stream, located on the southern shore of the inner bay. We observed relative reductions in the (La/Yb)(UCC) value and REE content in the sediments from the mouth of the bay compared with those from Jujin Stream sediments. Confined to the middle tidal flat around the KH Line of Jujin Stream, the sediments, most enriched in LREEs but depleted in Eu, were distributed in August as strong Jujin Stream runs. Here, we suggest that an increase in LREE/HREE and decrease in MREE/LREE ratios can be used as a proxy to identify the Jujin Stream provenance in mixed riverine sediments and to trace Jujin Stream sediments within the Gomso Bay tidal flat, especially in the summer rainy season.
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ISSN
- 1738-5261
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/2156
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DOI
- 10.1007/s12601-016-0027-7
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Bibliographic Citation
- OCEAN SCIENCE JOURNAL, v.51, no.3, pp.305 - 316, 2016
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Publisher
- KOREA OCEAN RESEARCH DEVELOPMENT INST
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Subject
- SOUTHEASTERN YELLOW-SEA; REE GEOCHEMISTRY; GOMSO BAY; SURFACE SEDIMENTS; STREAM SEDIMENTS; FRACTIONATION; DISPERSAL; ORIGIN; RIVERS; SHELF
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Keywords
- rare earth elements; REE fractionation; sediment origin; tidal flat; Gomso Bay
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Type
- Article
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Language
- English
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Document Type
- Article
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