IOCAS-IR  > 海洋地质与环境重点实验室
Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field
Yang, Baoju1,2; Zeng, Zhigang1; Qi, Haiyan1,3; Wang, Xiaoyuan1; Ma, Yao1; Rong, Kunbo1
2015-12-01
Source PublicationOCEAN SCIENCE JOURNAL
Volume50Issue:4Pages:751-761
SubtypeArticle
AbstractFe-Si oxide deposits were recovered from the PACMANUS (Papua New Guinea-Australia-Canada-Manus) hydrothermal field in Eastern Manus basin. Samples were loose and fragile. Optical and scanning electron microscopy showed that the samples had abundant rod-like or twisted filamentous and granular structures. Electron probe microanalysis revealed that these filaments and grains were mainly composed of Fe and Si. The presence of spherical grains on the surface of the filaments suggests the intergrowth of biotic and abiotic reactions. Biotic and abiotic kinetics competition always exists in the redox gradient. Based on the physico-chemical conditions of PACMANUS hydrothermal fluids, we calculated a strict abiotic oxidation rate of Fe2+ to Fe3+, which is approximately 0.0123 g/min. If the fluids had been erupting consistently and the concentration of Fe2+ was constant, 3.232 kg per year of Fe would be deposited in this vent. The amount of Fe oxides around the studied vent was larger than the amount determined by strict abiotic kinetic calculation. Bacteria may also play an important role in Fe oxidation. A mesh-like microenvironment constructed by biogenic filaments ensured adequate Fe2+ and low oxygen content for the growth of bacteria. Moreover, this structure promoted the deposition of abiotic Fe-Si oxides.
KeywordFe-si Oxides Biotic And aBiotic Role Pacmanus
DOI10.1007/s12601-015-0067-4
Indexed BySCI
Language英语
WOS IDWOS:000367829200012
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Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/95213
Collection海洋地质与环境重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Seafloor Hydrothermal Act Lab, Qingdao 266061, Peoples R China
2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China
3.Chengdu Univ Technol, Chengdu 610059, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang, Baoju,Zeng, Zhigang,Qi, Haiyan,et al. Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field[J]. OCEAN SCIENCE JOURNAL,2015,50(4):751-761.
APA Yang, Baoju,Zeng, Zhigang,Qi, Haiyan,Wang, Xiaoyuan,Ma, Yao,&Rong, Kunbo.(2015).Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field.OCEAN SCIENCE JOURNAL,50(4),751-761.
MLA Yang, Baoju,et al."Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field".OCEAN SCIENCE JOURNAL 50.4(2015):751-761.
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