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Great Oxidation Event - Wikipedia

The Great Oxidation Event (GOE), also called the Great Oxygenation Event, was a time period when the Earth's atmosphere and the shallow ocean first experienced a rise in oxygen, approximately 2.4–2.0 Ga (billion years ago) during the Paleoproterozoic era. Geological, isotopic, and chemical evidence suggests that biologically-produced molecular oxygen (dioxygen, O 2) started to accumulate in ...

Biological Carbon Precursor To Diagenetic Siderite With

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations I. KÖHLER1*, K. O. KONHAUSER2, D. PAPINEAU3, A. BEKKER4 AND A. KAPPLER5 1Friedrich-Schiller-University, Institute of Geosciences, Jena, Germany (*[email protected]) 2University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton ...

HKU Scholars Hub: Formation of diagenetic siderite in ...

We infer early diagenetic growth of siderite crystals as a response to sedimentary organic carbon degradation and the accumulation of dissolved inorganic carbon in pore waters. We suggest that siderite formation proceeds through syntaxial growth on preexisting siderite crystals, or possibly through aging of precursor carbonate green rust.

The microbially driven formation of siderite in salt marsh ...

of growth. What is interesting is that if diagenetic siderite formation is the dominant pathway to form siderite concretions, then they may reflect conditions within the sediment column rather than condi-tions related to the overall ocean–atmosphere system. Hence, study of the formation of siderite in the laboratory and in the natural en-

CiteSeerX — Citation Query Extending the upper temperature ...

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations by Kurt O. Konhauser, Dominic Papineau, Andrey Bekker During deposition of Precambrian iron formation, the combined sedimentation of ferrihydrite and phytoplankton biomass should have facilitated Fe(III) reduction during diagenesis.

Dr. Inga Köhler

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations. 2016 SPP Building a Habitable Earth Meeting in Cologne, Poster: DIfferent phases of carbonaceous matter in microbial mats of the Moodies Group in …

Stable oxygen and carbon isotope compositional fields for ...

siderite, calcite, and dolomite concretions have developed during shallow burial in a range of freshwater to marine depositional settings, the carbon originating mainly from early diagenetic, bacterially mediated reactions involving the decomposition of organic matter in bottom sediments. A summary S18O-8I3C diagram showing mean and standard-

THE GEOLOGIC CONTEXT OF WONDERSTONE: A COMPLEX, …

the spherulitic siderite in transported siltstone intraclasts as their sources of energy and carbon. The ferrous iron ... (1981) classification, diagenetic siderite forms in sediments that are anoxic, nonsulfidic, and methanic. Siderite is typically ... calculations for Navajo spheroidal concretions favor siderite as the original (precursor ...

Rostende Ur-Ozeane durch Bakterien - Internetchemie

Inga Köhler, Kurt O Konhauser, Dominic Papineau, Andrey Bekker, Andreas Kappler: Biological carbon precursor to diagenetic siderite with spherical structures in iron formations. In: Nature Communications; online veröffentlicht am 23.April 2013, DOI 10.1038/ncomms2770. Quelle: Eberhard Karls Universität, Tübingen

Iron and Carbon Isotope Evidence for Microbial Iron ...

Banded Iron-Formations (BIFs) are voluminous chemical sediments that are rich in iron-oxide, carbonate and silica and whose occurrence is unique to the Precambrian. Their preservation in the geological records offers insights to the surface chemical and biological cycling of iron and carbon on early Earth. However, many details regarding the role of microbial activity in BIF deposition and ...

Microbial Control on Siderite Formation in Ferruginous ...

Authigenic minerals can be formed in the water column and sediments, either abiotically or triggered by biological activity, and have been used as proxies for paleosalinity, paleoproductivity and diagenetic conditions. Siderite crystals (FeCO3) from ferruginous Lake Towuti were investigated to infer mineral formation associated with processes of organic matter remineralization and microbial ...

‪Dominic Papineau‬ - ‪Google Scholar‬

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations. I Köhler, KO Konhauser, D Papineau, A Bekker, A Kappler. Nature Communications 4 (1), 1-7, 2013. 78: 2013: High primary productivity and nitrogen cycling after the Paleoproterozoic phosphogenic event in the Aravalli Supergroup, India.

(PDF) Biological carbon precursor to diagenetic siderite ...

ARTICLE Received 26 Sep 2012 | Accepted 19 Mar 2013 | Published 23 Apr 2013 DOI: 10.1038/ncomms2770 Biological carbon precursor to diagenetic siderite with spherical structures in iron formations Inga Ko¨hler1, Kurt O. Konhauser2, Dominic Papineau3,4, Andrey Bekker5 & Andreas Kappler1 During deposition of Precambrian iron formation, the combined sedimentation of ferrihydrite …

17. ORIGIN OF DIAGENETIC CARBONATE MINERALS …

Diagenetic carbonate minerals in upper Cenozoic sediments recovered from the New Jersey slope are a byproduct of organic matter degradation and the dissolution of precursor biogenic calcite, mostly foraminifers and nannofossils. The diage-netic carbonate …

Biological carbon precursor to diagenetic siderite with ...

Here we show experi-mentally that spheroidal siderite, which is preserved in many iron formation and could have been precursor to rhombohedral or massive siderite, forms by reacting ferrihydrite with glucose (a proxy for microbial biomass) at pressure and temperature conditions typical of diagenesis (170 C …

(PDF) Formation of diagenetic siderite in modern ...

Siderite of syngenetic origin generally forms in reduced water with abundant iron and CO 3 2− where sulfate is scarce or absent (Huggett et al., 2000), and has been regarded as an early ...

Inga Köhler - Academia.edu

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations more by Kurt Konhauser, Andreas Kappler, and Inga Köhler Publication Date: 2013

Tiny Talk 1A | PDF

Biological Carbon Precursor to Diagenetic Siderite With Spherical Structures in Iron Formations _ Nature Communications _ Nature Publishing Group. Uploaded by. cosmibota. Studiul Zacamntului de Limonit Oolitic Si de Glauconit Din Formatiunile Eocene Ale Bazinului Transilvaniei I. …

Iron in primeval seas rusted by bacteria -- ScienceDaily

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations. Nature Communications, 2013; 4: 1741 DOI: 10.1038/ncomms2770 Cite This Page :

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[3] K Hler I, Konhauser K O, Papineau D, et al. Biological carbon precursor to diagenetic siderite with spherical structures in iron formations[J]. Nature Communications.

Kurt Konhauser | University of Alberta - Academia.edu

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations more by Kurt Konhauser, Andreas Kappler, and Inga Köhler Publication Date: 2013

Biological carbon precursor to diagenetic siderite ...

Request PDF | Biological carbon precursor to diagenetic siderite spherulites in banded iron formations | During deposition of Precambrian iron formation, the combined sedimentation of …

Formation of diagenetic siderite in modern ferruginous ...

We infer early diagenetic growth of siderite crystals as a response to sedimentary organic carbon degradation and the accumulation of dissolved inorganic carbon in pore waters. We suggest that siderite formation proceeds through syntaxial growth on preexisting siderite crystals, or possibly through aging of precursor carbonate green rust.

Biological carbon precursor to diagenetic siderite with ...

Alternatively, siderite can be formed during the diagenetic (biological or non-biological), and subsequent metamorphic, oxidation of microbial biomass to CO 2 /bicarbonate coupled to the reduction ...

Carbon Isotopes - an overview | ScienceDirect Topics

Carbon isotopes have been extensively used as evidence for the appearance of life on Earth (see Schopf and Klein, 1992), and simultaneously for the "invention" of carbon fixation. Mojzsis et al. (1996) used these approaches to push the earliest evidence for life back to 3.8 Ga. However, as often occurs with such ancient samples, the age of the samples has been debated (Kamber and Moorbath ...

Rinded iron-oxide concretions: hallmarks of altered ...

after siderite (Loope et al., 2011). These relation-ships indicate not only that the concretions of the Navajo Sandstone had siderite precursors, but also that these formed during late diagenesis. Siderite is easily overlooked both in the field and in the laboratory (Berner, 1971). Because it is unstable in the presence of molecular oxygen, a

Précurseur de carbone biologique à la sidérite ...

Le rôle des bactéries dans l'origine des formations de fer (IF) reste flou car il n'existe aucune preuve directe de leur implication. Cette étude montre que la sidérite sphérique dans les FI profondes représente une biosignature pour la photoferrotrophie, alors que la sidérite massive reflète une biomasse cyanobactérienne élevée dans les eaux peu profondes.

Biological carbon precursor to diagenetic siderite ... - CORE

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations

University of Nebraska - Lincoln [email protected] ...

progressive oxidation of siderite concretions, with the rinds reflecting the shapes of their siderite-cemented precursor concretions. Van der Burg (1969, 1970) provided another example (from Pleis-tocene fluvial sands of the Netherlands) of rinded, iron oxide–cemented concretions that formed via the oxidation of a siderite-cemented precursor.

The microbially driven formation of siderite in salt marsh ...

Furthermore, the nucleation pathway for siderite is unclear, for example, whether there is a less stable carbonate precursor to siderite such as amorphous calcium carbonate (ACC), amorphous iron (II) carbonate (AFC) (Dideriksen et al., 2015; Jiang & Tosca, 2019; Sel et al., 2012) or monohydrocalcite (MHC) and whether siderite (both nodular or ...

Suboxic diagenesis in banded iron formations. - Abstract ...

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations. Köhler I, Konhauser KO, Papineau D, Bekker A, Kappler A. Nat Commun, 4:1741, 01 Jan 2013 Cited by: 8 articles | PMID: 23612282

Evidence for early life in Earth's oldest hydrothermal ...

However, because non-biological decarbonation reactions and Fischer-Tropsch-type synthesis 5 can produce reduced carbon with similar isotopic compositions, non-biological interpretations are ...

Fate of organic compounds during transformation of ...

However, the low concentration of organic compounds in IFs and their diagenetic or metamorphic derivatives, challenges the hypothesis of their biogenic origin (Klein, 2005. Klein, C. (2005) Some Precambrian banded iron-formations (BIFs) from around the world: Their age, geologic setting, mineralogy, metamorphism, geochemistry, and origins.

Uncovering the Origin of Magnetism in Early Proterozoic ...

Previous studies concluded that organic matter, in association with Fe(III) mineral precipitates, forms spherical siderite structures under diagenetic conditions (Kohler et al. 2012). Rhombohedral siderite seen in the sample could have formed from a spheroidal siderite precursor, accounting for the spheroidal voids in some siderite cores.

Biological carbon precursor to diagenetic siderite with ...

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations Inga Ko¨hler1, Kurt O. Konhauser2, Dominic Papineau3,4, Andrey Bekker5 & Andreas Kappler1 During deposition of Precambrian iron formation, the combined sedimentation of ferrihydrite

Simulating Precambrian banded iron formation diagenesis ...

After 14 days, samples with excess carbon (ratio 2.4) formed siderite and magnetite (Fig. 3A). The siderite had globular structures similar but smaller than those in electron ratio 0.6 set-ups ... Biological carbon precursor to diagenetic siderite spherulites in banded iron formations. Nature Communications, 4 (2013), p. 1741.