Inorganic and biogenic As-sulfide precipitation at seafloor hydrothermal fields

Vesselin M. Dekov, Luca Bindi, Gaëtan Burgaud, Sven Petersen, Dan Asael, Vanessa Rédou, Yves Fouquet, Bernhard Pracejus

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13 Citations (Scopus)

Abstract

We investigated As-sulfides (orpiment, As2S3 and realgar, As4S4) from four seafloor hydrothermal fields: three from back-arc and one from mid-ocean ridge settings. Our studies suggest two different modes of As-sulfide precipitation at the seafloor hydrothermal sites: inorganic and biogenic. The Eh-pH modeling shows that the most stable As-sulfide at low-temperature (T2S3. This process of fungal orpiment precipitation is a mechanism of bio-sequestration of hydrothermal As and another mode of soft-tissue fossilization not described so far.

Original languageEnglish
Pages (from-to)28-38
Number of pages11
JournalMarine Geology
Volume342
DOIs
Publication statusPublished - Aug 1 2013

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Keywords

  • Fungi
  • Modeling
  • Orpiment
  • Realgar
  • Submarine hydrothermal

ASJC Scopus subject areas

  • Oceanography
  • Geochemistry and Petrology
  • Geology

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