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Generation of hydrothermal Fe-Si oxyhydroxide deposit on the Southwest Indian Ridge and its implication for the origin of ancient banded iron formations
Sun, Zhilei1,2; Li, Jun1,2; Huang, Wei1,2; Dong, Hailiang3; Little, Crispin T. S.4; Li, Jiwei5
2015
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
Volume120Issue:1Pages:187-203
AbstractModern hydrothermal Fe-Si oxyhydroxide deposits are now known to be analogues to ancient siliceous iron formations. In this study, samples of Fe-Si oxyhydroxide deposits were collected from hydrothermal field on the Southwest Indian Ridge. An investigation of mineralization in these deposits was carried out based on a series of mineralogical and morphological methods. X-ray diffraction and selected area electron diffraction analysis show that amorphous opal and poorly crystalline ferrihydrite are the major minerals. Furthermore, some typical filament structures detected by scanning electronic microscopy examinations, probably indicating the presence of Fe-oxidizing bacteria (FeOB), are pervasive with the main constituents being Fe, Si, P, and C. We thus believe that chemolithoautotrophic FeOB play a significant role in the formation of Fe oxyhydroxide which can effectively oxidize reduced Fe(II) sourced from hydrothermal fluids. Precipitation of amorphous silica, in contrast, is only a passive process with the Fe oxyhydroxide acting as a template. The distinct microlaminae structure alternating between the Fe-rich and Si-rich bands was observed in our samples for the first time in modern seafloor hydrothermal systems. We propose that its formation was due to the episodic temperature variation of the hydrothermal fluid which controls the biogenic Fe oxyhydroxide formation and passive precipitation of silica in this system. Our results might provide a clue for the formation mechanism of ancient banded iron formations.
SubtypeArticle
KeywordHydrothermal Fe-si Oxyhydroxide Deposits Biomineralization Chemolithoautotrophic Fe-oxidizing Bacteria Southwest Indian Ridge Banded Iron Formations
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1002/2014JG002764
Indexed BySCI
Language英语
WOS KeywordDE-FUCA RIDGE ; YELLOWSTONE-NATIONAL-PARK ; OXIDIZING BACTERIA ; LOIHI SEAMOUNT ; HOT-SPRINGS ; BIOLOGICAL ORIGIN ; MICROBIAL MATS ; NEW-ZEALAND ; SILICA ; FERRIHYDRITE
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000349899200013
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/462
Collection深海科学研究部_深海地质与地球化学研究室
Affiliation1.Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao, Peoples R China
2.Qingdao Inst Marine Geol, Qingdao, Peoples R China
3.Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA
4.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England
5.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya, Peoples R China
Recommended Citation
GB/T 7714
Sun, Zhilei,Li, Jun,Huang, Wei,et al. Generation of hydrothermal Fe-Si oxyhydroxide deposit on the Southwest Indian Ridge and its implication for the origin of ancient banded iron formations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2015,120(1):187-203.
APA Sun, Zhilei,Li, Jun,Huang, Wei,Dong, Hailiang,Little, Crispin T. S.,&Li, Jiwei.(2015).Generation of hydrothermal Fe-Si oxyhydroxide deposit on the Southwest Indian Ridge and its implication for the origin of ancient banded iron formations.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,120(1),187-203.
MLA Sun, Zhilei,et al."Generation of hydrothermal Fe-Si oxyhydroxide deposit on the Southwest Indian Ridge and its implication for the origin of ancient banded iron formations".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 120.1(2015):187-203.
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