Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis

Potential influence of sulphur bacteria on Palaeoproterozoic phosphogenesis
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硫细菌对古元古代磷发生的潜在影响

DOI:
10.1038/ngeo2005
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发表时间:
2013
期刊:
影响因子:
18.3
通讯作者:
Lepland A
Lepland A
中科院分区:
地球科学1区
文献类型:
--
作者:
Lepland A

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所有已知的生命形式都需要磷,生物过程强烈影响着全球磷循环。虽然地球上的生命记录可以追溯到38亿年前,生物磷酸盐加工的出现至少可以追溯到35亿年前,但已知最早的富磷矿床仅出现在20亿年前。24 - 23亿年前,大气中氧含量的增加以及与之相关的深刻的地球化学变化,增加了磷酸盐向海洋的河流输入,促进了生物生产力和磷酸化作用,是磷沉积的开始。然而,富含磷的沉积物比氧气的上升晚了大约3亿年。在这里,我们使用微组构,微量元素和碳同位素分析,以评估环境设置和氧化还原条件的20亿岁的富磷矿床的喷口或渗漏影响Zaonega组,俄罗斯西北部。我们确定了类似于现代甲烷古菌和硫氧化细菌的磷酸盐化微生物化石,类似于现代渗漏环境和具有尖锐氧化还原跃层的上升流区中发现的生物。因此,我们建议,在Zaonega组的富磷矿床形成的硫细菌,类似于现代网站介导的磷酸盐,并通过沉淀的钙磷酸盐矿物在早期成岩作用的微生物模板。
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.
磷酸盐叠层石中磷灰石的成因
DOI: --
发表时间: 2001
期刊:
影响因子: --
作者:
A. Sánchez;A. Martín
通讯作者: A. Martín
DOI: 10.1016/j.precamres.2011.10.013
发表时间: 2012
影响因子: 3.8
作者:
M. Reuschel;V. Melezhik;M. Whitehouse;A. Lepland;A. Fallick;H. Strauss
通讯作者: M. Reuschel;V. Melezhik;M. Whitehouse;A. Lepland;A. Fallick;H. Strauss
佩琴加绿岩带早元古代(2.04 GA)磷矿及其成因
DOI: --
发表时间: 2007
期刊: SPIE Optical Engineering + Applications
影响因子: --
作者:
A. Y. Rozanov;M. Astafieva;R. Hoover
通讯作者: R. Hoover
DOI: 10.1038/ngeo913
发表时间: 2010-08-01
期刊: NATURE GEOSCIENCE
影响因子: 18.3
作者:
Goldhammer, Tobias;Bruchert, Volker;Zabel, Matthias
通讯作者: Zabel, Matthias