Metal enrichment and magnetic properties of core sediments from the eastern Yellow Sea, East Asia: Implications for paleo-depositional change during the late Pleistocene/Holocene transition
- Authors
- Kwon, Man-Jae; Yun, Seong-Taek; Doh, Seong-Jae; Son, Byeong-Kook; Choi, Kyungsik; Kim, Wonnyon
- Issue Date
- 15-1월-2011
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- QUATERNARY INTERNATIONAL, v.230, no.1-2, pp.95 - 105
- Indexed
- SCIE
SCOPUS
- Journal Title
- QUATERNARY INTERNATIONAL
- Volume
- 230
- Number
- 1-2
- Start Page
- 95
- End Page
- 105
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/113268
- DOI
- 10.1016/j.quaint.2009.07.027
- ISSN
- 1040-6182
- Abstract
- To investigate the paleo-depositional environments, sediment cores YJI and YJ2 from a tidal flat of the eastern Yellow Sea were analyzed for the vertical variations of metal concentrations, particle size, clay mineralogy, magnetic properties, and total organic carbon content (TOC). Fe (and Mn) concentrations determined by both partial and total acid extraction increased at 15 m depth in YJ1 and 10 m in YJ2. The layer directly below these Fe-rich brownish horizons showed dramatic decreases in clay mineral content and trace metals (Zn, Pb, Cu, Cr, Co, Ni, and As), but increases in sand fraction, magnetic susceptibility, and TOC. All results were inverse in the upper metal-rich layer. These dramatic changes in multiparameters are likely due to an environmental change during the late Pleistocene/Holocene transition. The rapid environmental change (sand-rich and oxic -> clay-rich and anoxic) resulted in aqueous dissolution of redox-sensitive metals (e.g., Fe and Mn) from the lower sandy layer materials. The dissolved metals diffused upward and concomitantly were immobilized within the upper clay-rich layer. The reprecipitated Fe (or Mn) (hydro)oxides then scavenged trace metals by coprecipitation and/or adsorption. This study suggests that metal distribution patterns can provide new insights into the paleo-depositional processes during the Pleistocene-Holocene period. (C) 2009 Elsevier Ltd and INQUA. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Earth and Environmental Sciences > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.