Characterization of Fe-S minerals influenced by buried ancient woods in the intertidal zone, East China Sea

Linxi Yuan, Liguang Sun*, Danielle Fortin, Yuhong Wang, Zijun Wu, Xuebin Yin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


An ancient wood layer dated at about 5600 cal. a BP by AMS14C dating was discovered in the intertidal zone, East China Sea. Samples affected by ancient woods, including fresh coast bedrock, weathering bedrock, seepage water from coast, seepage water from ancient wood layer, intertidal seawater, fresh water, beach mud, ancient wood barks and ancient peat, were collected for geochemical analysis. The beach mud and the bacteriogenic iron oxides (BIOS) in coastal seepage water were analyzed by mineralogical and high-resolution transmission electron microscopy (HRTEM)-selected area electron diffraction (SAED) analysis. Inorganic sulfur compositions and δ 34S of the ancient peat and the beach mud were determined. The results showed that Fe, Mn, S (SO 4 2- ) were enriched in the intertidal area at different levels, very likely caused by fermentation of ancient woods. The presence of abundant ironoxidizing bacteria (FeOB) and sulfate-reducing bacteria (SRB) in this intertidal zone was confirmed by HRTEM-SAED observation, and these bacteria were involved in Fe-S cycle to induce extracellular biomineralization. The negative δ 34SV-CDT (-2.9‰) likely indicated the biogenic origin of iron-sulfide minerals in the beach mud at high sulfate reduction rate (SRR). These findings are helpful for understanding the biogeochemical Fe-S cycle and biomineralization process at high organic matter deposition rate and high SRR in the intertidal zone, estuary, or near shoreline.

Original languageEnglish
Pages (from-to)1931-1940
Number of pages10
JournalChinese Science Bulletin
Issue number11
Publication statusPublished - Jun 2009
Externally publishedYes


  • Ancient wood layer
  • East China Sea
  • Fe-S minerals
  • Intertidal zone
  • Iron-oxidizing bacteria (FeOB)
  • Sulfate-reducing bacteria (SRB)

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