Geosciences Journal

, Volume 3, Issue 3, pp 163–170 | Cite as

Occurrence of authigenic siderites in the Early Holocene coastal deposit in the west coast of Korea: an indicator of depositional environment

  • Boo-Keun Khim
  • Kyung-Sik Choi
  • Yong-Ahn Park
  • Jae-Kyung Oh


The macrotidal muddy deposits around Youngjong Island in the west coast of Korea with a radiocarbon dating of ca. 8000 yr BP contain micro-scale (ca. 150 μm) siderite concretions. The authigenic siderites exhibit the aggregated spherulitic textures with well-developed rhombs on the grain surfaces, which reflects good preservation. Geochemical analyses indicate that the concentrations of Mg (mean 2.6 mol%) and Ca (mean 9.4 mol%) are low whereas those of Fe (mean 70.4 mol%) and Mn (mean 17.6 mol%) are relatively high. The chemical composition suggests that the authigenic siderites might have precipitated in a non-marine environment. The occurrence of such siderites in the early Holocene sediments, considering the stratigraphic level with respect to the well-established sea-level curve helps recognize the non-marine depositional environment existed before the formation of modern tidal flats along the west coast of Korea.


siderite geochemistry coastal deposit early Holocene Korea 


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Copyright information

© Springer 1999

Authors and Affiliations

  • Boo-Keun Khim
    • 1
  • Kyung-Sik Choi
    • 2
  • Yong-Ahn Park
    • 2
  • Jae-Kyung Oh
    • 3
  1. 1.Research Institute of OceanographySeoul National UniversitySeoulKorea
  2. 2.Department of OceanographySeoul National UniversitySeoulKorea
  3. 3.Department of OceanographyInha UniversityIncheonKorea

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