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dc.contributor.authorLeroux, Hugues
dc.contributor.authorCordier, Patrick
dc.date.accessioned2021-02-12T21:40:40Z
dc.date.available2021-02-12T21:40:40Z
dc.date.issued2006-01-01
dc.identifier.citationLeroux, H., & Cordier, P. (2006). Magmatic cristobalite and quartz in the NWA 856 Martian meteorite. Meteoritics & Planetary Science, 41(6), 913-923.
dc.identifier.issn1945-5100
dc.identifier.doi10.1111/j.1945-5100.2006.tb00495.x
dc.identifier.urihttp://hdl.handle.net/10150/656146
dc.description.abstractSilica-rich late-stage crystallization pockets in the Martian meteorite Northwest Africa (NWA) 856 were investigated by transmission electron microscopy (TEM). The pockets occur as wedges between maskelynite laths or between maskelynite and pyroxene. They consist of elongated grains of cristobalite and quartz embedded in a silica-rich glass. Interstitial to the amorphous phase and silica minerals, a number of small accessory minerals have been identified, typical for late-stage crystallization products. They are ilmenite, tranquillityite, fayalite, troilite, baddeleyite, apatite, and chloroapatite. Cristobalite and quartz are shocked, as revealed by the occurrence of numerous amorphous lamellae. This assemblage suggests metastable dendritic crystallization under hydrous conditions. Cristobalite crystallization was probably facilitated by the presence of impurities such as Na or H2O. Our observations show that silica minerals can be formed under magmatic conditions on Mars.
dc.language.isoen
dc.publisherThe Meteoritical Society
dc.relation.urlhttps://meteoritical.org/
dc.rightsCopyright © The Meteoritical Society
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectNorthwest Africa (NWA) 856 Martian meteorites
dc.subjectelectron microscopy
dc.subjectshock metamorphism
dc.subjectShocked quartz
dc.titleMagmatic cristobalite and quartz in the NWA 856 Martian meteorite
dc.typeArticle
dc.typetext
dc.identifier.journalMeteoritics & Planetary Science
dc.description.collectioninformationThe Meteoritics & Planetary Science archives are made available by the Meteoritical Society and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume41
dc.source.issue6
dc.source.beginpage913
dc.source.endpage923
refterms.dateFOA2021-02-12T21:40:41Z


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