Sediment geochemistry data for the publication: “10Be/9Be ratios reveal marine authigenic clay formation”

Bernhardt, Anne; Oelze, Marcus; Bouchez, Julien; von Blanckenburg, Friedhelm; Mohtadi, Mahyar; Christl, Marcus; Wittmann-Oelze, Hella;

2020 || GFZ Data Services

As reverse weathering has been shown to impact long-term changes in atmospheric CO2 levels, it is crucial to develop quantitative tools to reconstruct marine authigenic clay formation. We explored the potential of the beryllium (Be) isotope ratio (10Be/9Be) recorded in marine clay-sized sediment to track neoformation of authigenic clays. The power of such proxy relies on the orders-of-magnitude difference in 10Be/9Be ratios between continental Be and Be dissolved in seawater. On riverine and marine sediments collected along a Chilean margin transect we chemically extracted reactive phases and separated the clay-sized sediment fraction. We compare the riverine and marine 10Be/9Be ratio of this fraction. Moreover, we compare the elemental and mineralogical composition and the Nd and Sr-isotopic composition of these samples. 10Be/9Be ratios increase four-fold from riverine to marine sediment. We attribute this increase to the incorporation of Be high in 10Be/9Be from dissolved biogenic opal, which also serves as a Si-source for the precipitation of marine authigenic clays. 10Be/9Be ratios thus sensitively track reverse-weathering reactions forming marine authigenic clays.

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Corresponding MSL vocabulary keywords

MSL enriched keywords

MSL enriched sub domains
  • geochemistry
Source http://dx.doi.org/10.5880/fidgeo.2020.009
Source publisher GFZ Data Services
DOI 10.5880/fidgeo.2020.009
Authors
  • Bernhardt, Anne
  • 0000-0002-2584-511X
  • Institute of Geological Sciences, Freie Universitaet Berlin, Berlin, Germany; Freie Universitaet Berlin, Berlin, Germany;
  • Oelze, Marcus
  • 0000-0002-3950-6629
  • GFZ German Research Centre for Geosciences, Inorganic and Isotope Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Bouchez, Julien
  • 0000-0003-4832-1615
  • Institut de Physique du Globe de Paris, 1 rue Jussieu, 75238 Paris 05, France;
  • von Blanckenburg, Friedhelm
  • 0000-0002-2964-717X
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Mohtadi, Mahyar
  • 0000-0003-3306-0969
  • MARUM Center for Marine Environmental Sciences, Bremen University, Bremen, Germany;
  • Christl, Marcus
  • 0000-0002-3950-6629
  • Laboratory of Ion Beam Physics, Department of Physics, ETH Zurich, Zurich, Switzerland; ETH Zurich, Zurich, Switzerland;
  • Wittmann-Oelze, Hella
  • 0000-0002-1252-705
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
Contributors
  • Bernhardt, Anne
  • ContactPerson
  • 0000-0002-2584-511X
  • Institute of Geological Sciences, Freie Universitaet Berlin, Berlin, Germany; Freie Universitaet Berlin, Berlin, Germany;
  • Bernhardt, Anne
  • Researcher
  • 0000-0002-2584-511X
  • Institute of Geological Sciences, Freie Universitaet Berlin, Berlin, Germany; Freie Universitaet Berlin, Berlin, Germany;
  • Oelze, Marcus
  • DataCollector
  • 0000-0002-3950-6629
  • GFZ German Research Centre for Geosciences, Inorganic and Isotope Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Oelze, Marcus
  • Researcher
  • 0000-0002-3950-6629
  • GFZ German Research Centre for Geosciences, Inorganic and Isotope Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Bouchez, Julien
  • Researcher
  • 0000-0003-4832-1615
  • Institut de Physique du Globe de Paris, 1 rue Jussieu, 75238 Paris 05, France;
  • Bouchez, Julien
  • DataCollector
  • 0000-0003-4832-1615
  • Institut de Physique du Globe de Paris, 1 rue Jussieu, 75238 Paris 05, France;
  • von Blanckenburg, Friedhelm
  • Researcher
  • 0000-0002-2964-717X
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Mohtadi, Mahyar
  • Researcher
  • 0000-0003-3306-0969
  • MARUM Center for Marine Environmental Sciences, Bremen University, Bremen, Germany;
  • Christl, Marcus
  • Researcher
  • 0000-0002-3950-6629
  • Laboratory of Ion Beam Physics, Department of Physics, ETH Zurich, Zurich, Switzerland; ETH Zurich, Zurich, Switzerland;
  • Christl, Marcus
  • DataCollector
  • 0000-0002-3950-6629
  • Laboratory of Ion Beam Physics, Department of Physics, ETH Zurich, Zurich, Switzerland; ETH Zurich, Zurich, Switzerland;
  • Wittmann-Oelze, Hella
  • Researcher
  • 0000-0002-1252-705
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
  • Wittmann-Oelze, Hella
  • DataCollector
  • 0000-0002-1252-705
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
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  • Cites
Contact
  • Wittmann-Oelze, Hella
  • GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany;
Citation Bernhardt, A., Oelze, M., Bouchez, J., von Blanckenburg, F., Mohtadi, M., Christl, M., & Wittmann-Oelze, H. (2020). Sediment geochemistry data for the publication: “10Be/9Be ratios reveal marine authigenic clay formation” [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2020.009
Spatial coordinates
  • eLong -70.84537679718045
  • nLat -36.07381876213758
  • sLat -38.193151241176864
  • wLong -74.91031820343045