Co-generation of hydrogen sulfide and methane in marine carbonate sediments

Richard M. Mitterer, Mitchell J. Malone, Glenn A. Goodfriend, Peter K. Swart, Ulrich G. Wortmann, Graham A. Logan, David A. Feary, Albert C. Hine

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Sulfate reduction and methanogenesis are considered to be mutually exclusive microbial reactions in marine sediments. Typically, methane does not appear in significant concentrations in sediment pore waters until almost all dissolved sulfate has been reduced to sulfide. An exception to this commonly accepted pattern occurs in an approximately 500-meter thick sequence of Quaternary carbonates on the continental margin of the Great Australian Bight. An unusual combination of geochemical and sedimentological conditions leads to extensive simultaneous sulfate reduction and methane production throughout the 500-m interval. A probable explanation for the co-production of these reduced gases in this deeper biosphere is the presence of non-competitive substrates for the two types of microbiota.

Original languageEnglish (US)
Pages (from-to)3931-3934
Number of pages4
JournalGeophysical Research Letters
Issue number20
StatePublished - Oct 15 2001

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)


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