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Assessing the robustness of carbonate‐associated sulfate during hydrothermal dolomitization of the Latemar platform, Italy

Schurr, Simon LukasORCIDiD
Strauss, Harald
Mueller, MathiasORCIDiD
Immenhauser, AdrianORCIDiD
DOI: https://doi.org/10.1111/ter.12554
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9894
Schurr, Simon Lukas; Strauss, Harald; Mueller, Mathias; Immenhauser, Adrian, 2021: Assessing the robustness of carbonate‐associated sulfate during hydrothermal dolomitization of the Latemar platform, Italy. In: Terra Nova, Band 33, 6: 621 - 629, DOI: 10.1111/ter.12554.
 
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  • Abstract
Carbonate‐associated sulfate (CAS) is an important proxy for reconstructing marine sulfur cycling throughout Earth's history. In order to assess the impact of carbonate neomorphism on δ34SCAS data, a mineralogical‐spatial transect from early diagenetic limestone into low‐temperature hydrothermal dolostone was analyzed in the middle Triassic Latemar platform interior, northern Italy. This study addresses the yet unconstrained question whether hydrothermal dolostone preserves a marine δ34SCAS signature and, hence, might represent an archive for past seawater sulfate. In this study, δ34SCAS values were measured in low‐temperature hydrothermal dolostone and compared with data from their corresponding precursor limestone. Results shown here reveal that δ34SCAS values for dolostone and precursor limestone are indistinguishable. This points to a rock‐buffered middle Triassic marine δ34S signature not affected by hydrothermal alteration. Hence, hydrothermal dolostone represents, under favorable conditions, an archive for unraveling past marine sulfur cycling.
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  • Geochemie, Mineralogie, Petrologie [507]
Subjects:
Italy
Latemar platform
Carbonate-associated sulfate (CAS)
marine sulfur cycling
sulfur isotope data
This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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