Sulphur diagenesis in the sediments of the Kiel Bight, SW Baltic Sea, as reflected by multiple stable sulphur isotopes

Strauss, H., Bast, Rebecca, Cording, A., Diekrup, David, Fugmann, A., Garbe-Schönberg, Dieter, Lutter, A., Oeser, M., Rabe, K., Reinke, D., Teichert, B. M. A. and Westernstroer, U. (2012) Sulphur diagenesis in the sediments of the Kiel Bight, SW Baltic Sea, as reflected by multiple stable sulphur isotopes Isotopes in Environmental and Health Studies, 48 (1). pp. 166-179. DOI 10.1080/10256016.2012.648930.

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Abstract

In this work, the biogeochemistry of marine sediments from the Kiel Bight, coastal SW Baltic Sea, is studied based on the abundance and isotopic composition of organic carbon and different forms of sedimentary sulphur. Active bacterial sulphate reduction, partly under sulphate-limiting conditions, is evident from paired delta S-34 and delta O-18 values of pore water sulphate. The resulting pore water sulphide is partly precipitated as acid-volatile iron sulphide and subsequently forms sedimentary pyrite, partly serves in later diagenetic sulphurisation of organic matter, or remains dissolved in the pore water, all evident from the respective delta S-34 values. Microbial sulphate turnover is associated with an apparent isotopic fractionation between dissolved sulphate and dissolved sulphide (Delta S-34) that varies between 46 and 66 parts per thousand.

Document Type: Article
Additional Information: Strauss, H Univ Munster, Inst Geol & Palaontol, D-48149 Munster, Germany Univ Munster, Inst Geol & Palaontol, D-48149 Munster, Germany Univ Munster, Inst Geol & Palaontol, D-48149 Munster, Germany Univ Munster, Inst Mineral, D-48149 Munster, Germany Univ Kiel, Inst Geowissensch, D-24118 Kiel, Germany Leibniz Univ Hannover, Inst Mineral, D-30167 Hannover, Germany
Keywords: baltic sea; isotope biogeochemistry; isotope ecology; oxygen-18; pore water; sediments; sulphur turnover; sulphur-32; sulphur-33; sulphur-34; microbial sulfate reduction; marine-sediments; inorganic sulfur; elemental sulfur; fractionation; sulfide; sulphur; disproportionation; environments; speciation; Alkor
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R07
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1080/10256016.2012.648930
ISSN: 1025-6016
Projects: Future Ocean
Date Deposited: 12 May 2014 12:02
Last Modified: 25 Feb 2017 10:44
URI: http://eprints.uni-kiel.de/id/eprint/24267

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