biological carbon precursor to diagenetic siderite with

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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.

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 ...

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

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 ...

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 ...

Auflistung Universitätsbibliographie nach Autor "Köhler, Inga"

Biological carbon precursor to diagenetic siderite with spherical structures in iron formations Kappler, Andreas ; Köhler, Inga ( 2013 ) Simulating diagenesis in precambrian banded iron formations

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 ...

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

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. …

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.

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.

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.

Inga Köhler - Friedrich-Schiller-Universität Jena

In the future I will focus on biological structures and signatures in BIFs of the Moodies and Fig Tree Group of the Barberton Greenstone Belt. ... Biological carbon precursor to diagenetic siderite spherulites in banded iron formations, showing the …

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 ...

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

(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 …

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

Article Iron and Carbon Isotope Constraints on the ...

graphs, Fe, C and O isotope of siderite, and organic C isotope of the whole rock from the ~2.52 Ga Dagushan BIF in the Anshan area, China, to discuss the origin of siderite. There are small magnetite grains that occur as inclusions within siderite, suggesting a diagenetic origin of the siderite.

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.

Suboxic diagenesis in banded iron formations | Nature

Anomalous isotopic composition has been reported for the carbon in carbonate minerals of banded iron formations. Well studied examples show an enrichment in the light isotope of carbon, 12C. This ...

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.

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 ...

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-

Biological carbon precursor to diagenetic siderite ... - CORE

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

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 …

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 ...

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

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 …