Carbon isotope exchange during calcite sulphation |
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| Institution: | 2. GFZ, German Research Centre for Geosciences, Potsdam, Germany;3. LIAG, Leibniz Institute for Applied Geophysics, Hannover, Germany;1. Pacific Northwest National Laboratory, Richland, WA, USA;2. University of Idaho, Moscow, ID, USA;3. Environmental Molecular Science Laboratory, Richland, WA, USA |
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| Abstract: | Sulphation of limestone and carbonaceous sandstone is a well-known process in the deterioration of natural stone, playing havoc with our cultural heritage over bygone decades. The overall mechanism in this process is not completely understood. Current studies using a laser-ablation technique followed by mass spectrometry indicated a surprising shift in carbon isotopes after sulphation. Naturally weathered century-old carbonaceous sandstone as well as laboratory exposed fresh stone of the same rocktype showed a consistent change in carbon isotopes (δ13C) during sulphation, indicating that atmospheric CO2 plays a part in the process. |
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