Articles | Volume 13, issue 11
https://doi.org/10.5194/cp-13-1635-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-13-1635-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation
Martin Schobben
CORRESPONDING AUTHOR
School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstr. 43, 10115 Berlin, Germany
Sebastiaan van de Velde
Analytical, Environmental and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
Jana Gliwa
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstr. 43, 10115 Berlin, Germany
Lucyna Leda
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstr. 43, 10115 Berlin, Germany
Dieter Korn
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstr. 43, 10115 Berlin, Germany
Ulrich Struck
Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstr. 43, 10115 Berlin, Germany
Institut für Geologische Wissenschaften, Freie Universität Berlin, Malteserstr. 74–100, 12249 Berlin, Germany
Clemens Vinzenz Ullmann
College of Engineering, Mathematics and Physical Sciences, Camborne School of Mines, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK
Vachik Hairapetian
Department of Geology, Esfahan (Khorasgan) Branch, Islamic Azad University, P.O. Box 81595-158, Esfahan, Iran
Abbas Ghaderi
Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad, Azadi Square, 9177948974, Mashhad, Iran
Christoph Korte
Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, Denmark
Robert J. Newton
School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
Simon W. Poulton
School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
Paul B. Wignall
School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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Dieter Korn, Lucyna Leda, Franziska Heuer, Hemen Moradi Salimi, Elham Farshid, Amir Akbari, Martin Schobben, Abbas Ghaderi, Ulrich Struck, Jana Gliwa, David Ware, and Vachik Hairapetian
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Astrid Hylén, Sebastiaan J. van de Velde, Mikhail Kononets, Mingyue Luo, Elin Almroth-Rosell, and Per O. J. Hall
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Sediments in oxygen-depleted ocean areas release high amounts of phosphorus, feeding algae that consume oxygen upon degradation, leading to further phosphorus release. Oxygenation is thought to trap phosphorus in the sediment and break this feedback. We studied the sediment phosphorus cycle in a previously anoxic area after an inflow of oxic water. Surprisingly, the sediment phosphorus release increased, showing that feedbacks between phosphorus release and oxygen depletion can be hard to break.
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Some 540 Myr ago, animal life evolved in the ocean. Previous research suggested that when these early animals started inhabiting the seafloor, they retained phosphorus in the seafloor, thereby limiting photosynthesis in the ocean. We studied salt marsh sediments with and without animals and found that their impact on phosphorus retention is limited, which implies that their impact on the global environment might have been less drastic than previously assumed.
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Short summary
Stratigraphic trends in the carbon isotope composition of calcium carbonate rock can be used as a stratigraphic tool. An important assumption when using these isotope chemical records is that they record a globally universal signal of marine water chemistry. We show that carbon isotope scatter on a confined centimetre stratigraphic scale appears to represent a signal of microbial activity. However, long-term carbon isotope trends are still compatible with a primary isotope imprint.
Stratigraphic trends in the carbon isotope composition of calcium carbonate rock can be used as...