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GEOREF RECORD

Bacterial S-layer preservation and rare arsenic-antimony-sulphide bioimmobilization in siliceous sediments from Champagne Pool hot spring, Waiotapu, New Zealand

Vernon R. Phoenix, Robin W. Renaut, Brian Jones and F. Grant Ferris
Bacterial S-layer preservation and rare arsenic-antimony-sulphide bioimmobilization in siliceous sediments from Champagne Pool hot spring, Waiotapu, New Zealand
Journal of the Geological Society of London (March 2005) 162 (2): 323-331

Abstract

Siliceous sinter, loose sediments, and suspended flocs in Champagne Pool, an anoxic hot (75 degrees C) spring at Waiotapu, New Zealand, are composed of opaline silica and metal-rich sulphides that contain many well-preserved, mineralized microbes. Detailed analysis by transmission electron microscopy and energy dispersive spectrometry has shown that bacterial cell wall and capsular material is preserved by the immobilization of high levels of As, Sb and S in the organic matrix. Calculation of the probable metal species in the spring water suggests that arsenic and antimony are present in solution as negative and neutrally charged sulphide or hydroxide complexes (such as HAs (sub 2) S (sub 4) (super -) , H (sub 3) AsO (sub 3) and HSb (sub 2) S (sub 4) (super -) ). The early adsorption of these complexes onto reactive groups on the bacterial surface may be paramount in the excellent preservation of cell morphology. As biomineralization progresses, biomineral composition commonly becomes dominated by the precipitation of a supersaturated Al-rich amorphous silica phase. Biomineralization commonly preserves S-layers, an ordered mosaic of proteins on the outer surface of the cell wall. These are the finest ultrastructure details thus far found in microbes preserved by hydrothermal mineralization, and can be used as an aid to identify microfossils. The S-layers preserved here probably belong to Clostridium thermohydrosulfuricum or Desulfotomaculum nigrifacans.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 162
Serial Issue: 2
Title: Bacterial S-layer preservation and rare arsenic-antimony-sulphide bioimmobilization in siliceous sediments from Champagne Pool hot spring, Waiotapu, New Zealand
Affiliation: University of Toronto, Department of Geology, Toronto, ON, Canada
Pages: 323-331
Published: 200503
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 55
Accession Number: 2005-024557
Categories: General geochemistrySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
S38°00'00" - S38°00'00", E177°00'00" - E177°00'00"
Secondary Affiliation: University of Saskatchewan, CAN, CanadaUniversity of Alberta, CAN, Canada
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200513
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