Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field

doi:10.1007/s12601-015-0067-4

	Constraints on biotic and abiotic role in the formation of Fe-Si oxides from the PACMANUS hydrothermal field
	Yang, Baoju 1,2; Zeng, Zhigang 1; Qi, Haiyan 1,3; Wang, Xiaoyuan 1; Ma, Yao 1; Rong, Kunbo 1
刊名	OCEAN SCIENCE JOURNAL
	2015-12
卷号	50 期号:4 页码:751-761
关键词	Fe-Si oxides biotic and abiotic role PACMANUS
ISSN号	1738-5261
DOI	10.1007/s12601-015-0067-4
英文摘要	Fe-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.
资助项目	Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2011KG09]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	KOREA OCEAN RESEARCH DEVELOPMENT INST
WOS记录号	WOS:000367829200012
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3579]
专题	自然资源部第一海洋研究所
作者单位	1.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
推荐引用方式 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.