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Biogeosciences An interactive open-access journal of the European Geosciences Union
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BG | Volume 15, issue 13
Biogeosciences, 15, 4087–4102, 2018
https://doi.org/10.5194/bg-15-4087-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 15, 4087–4102, 2018
https://doi.org/10.5194/bg-15-4087-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Technical note 04 Jul 2018

Technical note | 04 Jul 2018

Technical note: In situ measurement of flux and isotopic composition of CO2 released during oxidative weathering of sedimentary rocks

Guillaume Soulet et al.

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Short summary
Oxidative weathering of sedimentary rocks can release carbon dioxide to the atmosphere. Here, we designed a chamber-based method to measure these CO2 emissions directly for the first time. The chamber is drilled in the rock and allows us to collect the CO2 to fingerprint its source using carbon isotopes. We tested our method in Draix (France). The measured CO2 fluxes were substantial, with ~20% originating from oxidation of the rock organic matter and ~80% from dissolution of carbonate minerals.
Oxidative weathering of sedimentary rocks can release carbon dioxide to the atmosphere. Here, we...
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