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

authored by

Harald Strauss, Rebecca Bast, Anja Cording, David Diekrup, Artur Fugmann, Dieter Garbe-Schönberg, Andreas Lutter, Martin Oeser, Katharina Rabe, Debora Reinke, Barbara M.A. Teichert, Ulrike Westernströer

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 δ ³⁴S and δ ¹⁸O 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 δ ³⁴S values. Microbial sulphate turnover is associated with an apparent isotopic fractionation between dissolved sulphate and dissolved sulphide (Δ ³⁴S) that varies between 46 and 66‰.

Organisation(s)

Institute of Mineralogy

External Organisation(s)

University of Münster
Kiel University

Type

Article

Journal

Isotopes in Environmental and Health Studies

Volume

48

Pages

166-179

No. of pages

14

ISSN

1025-6016

Publication date

03.2012

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Environmental Chemistry, General Environmental Science, Inorganic Chemistry

Sustainable Development Goals

SDG 14 - Life Below Water

Electronic version(s)

https://doi.org/10.1080/10256016.2012.648930 (Access: Unknown)