TY - JOUR
T1 - Characterization of Fe-S minerals influenced by buried ancient woods in the intertidal zone, East China Sea
AU - Yuan, Linxi
AU - Sun, Liguang
AU - Fortin, Danielle
AU - Wang, Yuhong
AU - Wu, Zijun
AU - Yin, Xuebin
N1 - Funding Information:
Received January 21, 2009; accepted April 8, 2009 doi: 10.1007/s11434-009-0334-9 †Corresponding author (email: slg@ustc.edu.cn) Supported by the Project of the Knowledge Innovation Program Academy of Sciences (Grant No. KZCX3-SW-151)
PY - 2009/6
Y1 - 2009/6
N2 - 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.
AB - 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.
KW - Ancient wood layer
KW - East China Sea
KW - Fe-S minerals
KW - Intertidal zone
KW - Iron-oxidizing bacteria (FeOB)
KW - Sulfate-reducing bacteria (SRB)
UR - http://www.scopus.com/inward/record.url?scp=67049145252&partnerID=8YFLogxK
U2 - 10.1007/s11434-009-0334-9
DO - 10.1007/s11434-009-0334-9
M3 - Article
AN - SCOPUS:67049145252
SN - 1001-6538
VL - 54
SP - 1931
EP - 1940
JO - Chinese Science Bulletin
JF - Chinese Science Bulletin
IS - 11
ER -