globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2005
论文题名:
Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis
作者: Lepland A.; Joosu L.; Kirsimäe K.; Prave A.R.; Romashkin A.E.; Črne A.E.; Martin A.P.; Fallick A.E.; Somelar P.; Üpraus K.; Mänd K.; Roberts N.M.W.; Van Zuilen M.A.; Wirth R.; Schreiber A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:1
起始页码: 20
结束页码: 24
语种: 英语
英文摘要: All known forms of life require phosphorus, and biological processes strongly influence the global phosphorus cycle. Although the record of life on Earth extends back to 3.8 billion years ago and the advent of biological phosphate processing can be tracked to at least 3.5 billion years ago, the earliest known P-rich deposits appeared only 2 billion years ago. The onset of P deposition has been attributed to the rise of atmospheric oxygen 2.4-2.3 billion years ago and the related profound biogeochemical shifts, which increased the riverine input of phosphate to the ocean and boosted biological productivity and phosphogenesis. However, the P-rich deposits post-date the rise of oxygen by about 300 million years. Here we use microfabric, trace element and carbon isotope analyses to assess the environmental setting and redox conditions of the 2-billion-year-old P-rich deposits of the vent-or seep-influenced Zaonega Formation, northwest Russia. We identify phosphatized microorganism fossils that resemble modern methanotrophic archaea and sulphur-oxidizing bacteria, analogous to organisms found in modern seep settings and upwelling zones with a sharp redoxcline. We therefore propose that the P-rich deposits in the Zaonega Formation were formed by phosphogenesis mediated by sulphur bacteria, similar to modern sites, and by the precipitation of calcium phosphate minerals on microbial templates during early diagenesis. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106421
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Geological Survey of Norway, 7491 Trondheim, Norway; Tallinn University of Technology, Institute of Geology, 19086 Tallinn, Estonia, Estonia; Centre for Arctic Gas Hydrate, Environment and Climate, University of Tromsø, 9037 Tromsø, Norway; University of Tartu, Department of Geology, 50411 Tartu, Estonia; Department of Earth and Environmental Sciences, University of St Andrews, St-Andrews-KY16-9AL, United Kingdom; Institute of Geology, Karelian Science Centre, Pushkinskaya 11, 185610 Petrozavodsk, Russian Federation; Ivan Rakovec Institute of Paleontology, ZRC, SAZU, SI-1000 Ljubljana, Slovenia; NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom; Scottish Universities, Environmental Research Centre, Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride, G75 0QF, United Kingdom; Géobiosphère Actuelle et Primitive, Institut de Physique du Globe de Paris, Université Paris Diderot, 1 rue Jussieu, 75238 Paris cedex 5, France; GeoForschungsZentrum Potsdam, Telegrafenberg, Chemistry and Physics of Earth Materials, D-14473 Potsdam, Germany; GNS Science, Private Bag 1930, 9054 Dunedin, New Zealand

Recommended Citation:
Lepland A.,Joosu L.,Kirsimäe K.,et al. Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis[J]. Nature Geoscience,2014-01-01,7(1)
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