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GEOREF RECORD

Maghemite formation in burnt plant litter at East Trinity, North Queensland, Australia

Kirsty L. Grogan, Robert J. Gilkes and Bernd G. Lottermoser
Maghemite formation in burnt plant litter at East Trinity, North Queensland, Australia
Clays and Clay Minerals (August 2003) 51 (4): 390-396

Abstract

Evidence for the formation of maghemite from goethite due to a bushfire on acid sulfate soil at East Trinity, Australia, is presented. Oxidation of pyrite-bearing acid sulfate soils led to precipitation of goethite-impregnated leaf litter. During a major bushfire, goethite with a crystal size calculated from broadening of the 110 reflection of approximately 9 nm was converted to microcrystalline maghemite (size 12 nm, 220 reflection) and hematite (17 nm, 104 reflection) in a matrix of partly combusted plant litter. Replication of this natural formation of maghemite from goethite was achieved in the laboratory by burning goethite-impregnated leaf litter.


ISSN: 0009-8604
EISSN: 1552-8367
Coden: CLCMAB
Serial Title: Clays and Clay Minerals
Serial Volume: 51
Serial Issue: 4
Title: Maghemite formation in burnt plant litter at East Trinity, North Queensland, Australia
Affiliation: James Cook University, School of Earth Sciences, Cairns, Queensl., Australia
Pages: 390-396
Published: 200308
Text Language: English
Publisher: Clay Minerals Society, Clarkson, NY, United States
References: 23
Accession Number: 2003-082780
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, 1 table
S29°00'00" - S10°00'00", E138°00'00" - E153°00'00"
Secondary Affiliation: University of Western Australia, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200324
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