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Article: The geomicrobiology of bauxite deposits
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TitleThe geomicrobiology of bauxite deposits
 
AuthorsHao, X3 4
Leung, K2
Wang, R1
Sun, W3
Li, Y2
 
KeywordsBauxite
Biomineralization
Geomicrobiology
Microbial activity
Microbial-mediated release of elements
 
Issue Date2010
 
PublisherElsevier Ltd. The Journal's web site is located at http://www.sciencedirect.com/science/journal/16749871
 
CitationGeoscience Frontiers, 2010, v. 1 n. 1, p. 81-89 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.gsf.2010.06.001
 
AbstractBauxite deposits are studied because of their economic value and because they play an important role in the study of paleoclimate and paleogeography of continents. They provide a rare record of the weathering and evolution of continental surfaces. Geomicrobiological analysis makes it possible to verify that microorganisms have played a critical role during the formation of bauxite with the possibility already intimated in previous studies. Ambient temperature, abundance of water, organic carbon and bioavailable iron and other metal substrates provide a suitable environment for microbes to inhabit. Thiobacillus, Leptospirilum, Thermophilic bacteria and Heterotrophs have been shown to be able to oxidize ferrous iron and to reduce sulfate-generating sulfuric acid, which can accelerate the weathering of aluminosilicates and precipitation of iron oxyhydroxides. Microorganisms referred to the genus Bacillus can mediate the release of alkaline metals. Although the dissimilatory iron-reducing and sulfate-reducing bacteria in bauxites have not yet been identified, some recorded authigenic carbonates and "bacteriopyrites" that appear to be unique in morphology and grain size might record microbial activity. Typical bauxite minerals such as gibbsite, kaolinite, covellite, galena, pyrite, zircon, calcium plagioclase, orthoclase, and albite have been investigated as part of an analysis of microbial mediation. The paleoecology of such bauxitic microorganisms inhabiting continental (sub) surfaces, revealed through geomicrobiological analysis, will add a further dimension to paleoclimatic and paleoenvironmental studies. © 2010, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.
 
ISSN1674-9871
 
DOIhttp://dx.doi.org/10.1016/j.gsf.2010.06.001
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorHao, X
 
dc.contributor.authorLeung, K
 
dc.contributor.authorWang, R
 
dc.contributor.authorSun, W
 
dc.contributor.authorLi, Y
 
dc.date.accessioned2011-09-23T05:46:34Z
 
dc.date.available2011-09-23T05:46:34Z
 
dc.date.issued2010
 
dc.description.abstractBauxite deposits are studied because of their economic value and because they play an important role in the study of paleoclimate and paleogeography of continents. They provide a rare record of the weathering and evolution of continental surfaces. Geomicrobiological analysis makes it possible to verify that microorganisms have played a critical role during the formation of bauxite with the possibility already intimated in previous studies. Ambient temperature, abundance of water, organic carbon and bioavailable iron and other metal substrates provide a suitable environment for microbes to inhabit. Thiobacillus, Leptospirilum, Thermophilic bacteria and Heterotrophs have been shown to be able to oxidize ferrous iron and to reduce sulfate-generating sulfuric acid, which can accelerate the weathering of aluminosilicates and precipitation of iron oxyhydroxides. Microorganisms referred to the genus Bacillus can mediate the release of alkaline metals. Although the dissimilatory iron-reducing and sulfate-reducing bacteria in bauxites have not yet been identified, some recorded authigenic carbonates and "bacteriopyrites" that appear to be unique in morphology and grain size might record microbial activity. Typical bauxite minerals such as gibbsite, kaolinite, covellite, galena, pyrite, zircon, calcium plagioclase, orthoclase, and albite have been investigated as part of an analysis of microbial mediation. The paleoecology of such bauxitic microorganisms inhabiting continental (sub) surfaces, revealed through geomicrobiological analysis, will add a further dimension to paleoclimatic and paleoenvironmental studies. © 2010, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationGeoscience Frontiers, 2010, v. 1 n. 1, p. 81-89 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.gsf.2010.06.001
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.gsf.2010.06.001
 
dc.identifier.epage89
 
dc.identifier.hkuros194111
 
dc.identifier.issn1674-9871
 
dc.identifier.issue1
 
dc.identifier.scopuseid_2-s2.0-78649988572
 
dc.identifier.spage81
 
dc.identifier.urihttp://hdl.handle.net/10722/139200
 
dc.identifier.volume1
 
dc.languageeng
 
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.sciencedirect.com/science/journal/16749871
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofGeoscience Frontiers
 
dc.relation.referencesReferences in Scopus
 
dc.subjectBauxite
 
dc.subjectBiomineralization
 
dc.subjectGeomicrobiology
 
dc.subjectMicrobial activity
 
dc.subjectMicrobial-mediated release of elements
 
dc.titleThe geomicrobiology of bauxite deposits
 
dc.typeArticle
 
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Author Affiliations
  1. Nanjing University
  2. The University of Hong Kong
  3. Guangzhou Institute of Geochemistry Chinese Academy of Sciences
  4. Chinese Academy of Sciences