Biomineralization of gold: Biofilms on bacterioform gold

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2006

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Reith, F.
Rogers, S.
Mcphail, D.
Webb, D.

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Journal article

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Science, 2006; 313(5784):233-236

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Frank Reith, Stephen L. Rogers, D. C. McPhail, Daryl Webb

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<jats:p> Bacterial biofilms are associated with secondary gold grains from two sites in Australia. 16 <jats:italic>S</jats:italic> ribosomal DNA clones of the genus <jats:italic>Ralstonia</jats:italic> that bear 99% similarity to the bacterium <jats:italic>Ralstonia metallidurans</jats:italic> —shown to precipitate gold from aqueous gold(III) tetrachloride—were present on all DNA-positive gold grains but were not detected in the surrounding soils. These results provide evidence for the bacterial contribution to the authigenic formation of secondary bacterioform gold grains and nuggets. </jats:p>

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Copyright © 2006 American Association for the Advancement of Science

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