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DOI	10.1130/B31648.1
	Phytoplankton contributions to the trace-element composition of Precambrian banded iron formations
	Konhauser K.O.; Robbins L.J.; Alessi D.S.; Flynn S.L.; Gingras M.K.; Martinez R.E.; Kappler A.; Swanner E.D.; Li Y.-L.; Crowe S.A.; Planavsky N.J.; Reinhard C.T.; Lalonde S.V.
发表日期	2018
ISSN	167606
起始页码	941
结束页码	951
卷号	130 期号:2021-05-06
英文摘要	Banded iron formations are economically important sedimentary deposits in Earth's Precambrian rock record, consisting of alternating iron-rich (hematite, magnetite, and siderite) and silicate/carbonate (quartz, claylike minerals, dolomite, and ankerite) layers. Based on chemical analyses from banded iron formation units of the 2.48 Ga Dales Gorge Member of the Hamersley Group in Western Australia, it has been previously suggested that most, if not all, of the iron in banded iron formations could have been oxidized by anoxygenic phototrophic bacteria (photoferrotrophs) at cell densities considerably less than those found in modern iron-rich aqueous environments. However, oxygen-producing phytoplankton may have also been capable of supplying the necessary oxidizing power. Here, we revisit the question of the anoxygenic and oxygenic phytoplankton populations necessary to account for banded iron formation deposition and quantify the amount of selected trace elements (P, Mn, Co, Ni, Cu, Zn, Mo, Cd) that could have been associated with their biomass. Using an expanded geochemical data set for the Dales Gorge Member as an example, we find that with turnover times comparable to those seen in modern ecosystems, the same phytoplankton populations required to form banded iron formations could have supplied the entirety of trace elements found in this iron-rich deposit. Further, spurred by the similarities between banded iron formation and anoxygenic phytoplankton trace-element stoichiometries, we suggest that much of the trace-element inventory preserved in the banded iron formation was at some point biologically assimilated in the water column, released from degrading photoferrotrophic biomass at the seafloor and in the sediment pile, and ultimately fixed in the iron-rich sediment in approximately stoichiometric proportions by near-quantitative adsorption to ferrihydrite. Our observations suggest that, as today, phytoplankton and the recycling of their biomass exerted control over the traceelement composition of ancient seawater and sediment. © 2017 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185026
作者单位	Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada; Institut für Geo- und Umweltnaturwissenschaften, Albert-Ludwigs-Universität, Mineralogie-Geochemie, Freiburg, 79104, Germany; Department of Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Tübingen, 72074, Germany; Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA 50011, United States; Department of Earth Sciences, University of Hong Kong, Pokfulam Road, Hong Kong; Department of Microbiology and Immunology, Department of Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States; European Institute for Marine Studies, CNRS-UMR6538 Laboratoire Domaines Océaniques, Technopôle Brest-Iroise, Plouzané, 29280, France
推荐引用方式 GB/T 7714	Konhauser K.O.,Robbins L.J.,Alessi D.S.,et al. Phytoplankton contributions to the trace-element composition of Precambrian banded iron formations[J],2018,130(2021-05-06).
APA	Konhauser K.O..,Robbins L.J..,Alessi D.S..,Flynn S.L..,Gingras M.K..,...&Lalonde S.V..(2018).Phytoplankton contributions to the trace-element composition of Precambrian banded iron formations.Bulletin of the Geological Society of America,130(2021-05-06).
MLA	Konhauser K.O.,et al."Phytoplankton contributions to the trace-element composition of Precambrian banded iron formations".Bulletin of the Geological Society of America 130.2021-05-06(2018).