Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study

Back-scattered scanning electron microscopy (SEM) images of Cr-chlorite crystals from Erzerum (Turkey) reveal that the crystals are chemically inhomogeneous and display complex but well defined crystal zoning characterized by growth bands with contrasting chemical features. The chemical zoning has b...

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Detalhes bibliográficos
Autores: Prieto Colorado, A.C., Boiron, Marie Christine, Cathelineau, Michel, Mosser-Ruck, R., López García, José Ángel, García, C.
Formato: artículo
Fecha de publicación:2003
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/58320
Acesso em linha:https://hdl.handle.net/20.500.14352/58320
Access Level:acceso abierto
Palavra-chave:548.5
Chlorite
Cr
Electron microprobe
Raman spectroscopy
SEM
Cristalografía (Geología)
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oai_identifier_str oai:docta.ucm.es:20.500.14352/58320
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repository_id_str
spelling Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman studyPrieto Colorado, A.C.Boiron, Marie ChristineCathelineau, MichelMosser-Ruck, R.López García, José ÁngelGarcía, C.548.5ChloriteCrElectron microprobeRaman spectroscopySEMCristalografía (Geología)Back-scattered scanning electron microscopy (SEM) images of Cr-chlorite crystals from Erzerum (Turkey) reveal that the crystals are chemically inhomogeneous and display complex but well defined crystal zoning characterized by growth bands with contrasting chemical features. The chemical zoning has been investigated at the micron scale using an integrated approach, combining BSEM images, in situ chemical analysis by electron microprobe and Raman spectroscopy. Enrichment in Cr, due to octahedral Al substitution, reaches up to 0.7 atoms per half formula, especially in bands where the Mg content is depleted. These substitutions are also depicted at the micron scale on Raman spectra by changes in the n(OH) band intensities and positions that correlate with the Cr content. The Cr-enrichment occurs thus during specific stages of crystal growth, probably in response to changes in the fluid chemistry controlling the relative availability of Cr, Mg and Al in solution.Blackwell Scientific publicationsUniversidad Complutense de Madrid20032003-01-0120032003-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/58320reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/583202026-06-02T12:44:21Z
dc.title.none.fl_str_mv Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
title Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
spellingShingle Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
Prieto Colorado, A.C.
548.5
Chlorite
Cr
Electron microprobe
Raman spectroscopy
SEM
Cristalografía (Geología)
title_short Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
title_full Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
title_fullStr Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
title_full_unstemmed Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
title_sort Rythmic changes in crystal chemistry of trioctahedral Cr-chlorites and Cr entrapment: a SEM, EM and Raman study
dc.creator.none.fl_str_mv Prieto Colorado, A.C.
Boiron, Marie Christine
Cathelineau, Michel
Mosser-Ruck, R.
López García, José Ángel
García, C.
author Prieto Colorado, A.C.
author_facet Prieto Colorado, A.C.
Boiron, Marie Christine
Cathelineau, Michel
Mosser-Ruck, R.
López García, José Ángel
García, C.
author_role author
author2 Boiron, Marie Christine
Cathelineau, Michel
Mosser-Ruck, R.
López García, José Ángel
García, C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 548.5
Chlorite
Cr
Electron microprobe
Raman spectroscopy
SEM
Cristalografía (Geología)
topic 548.5
Chlorite
Cr
Electron microprobe
Raman spectroscopy
SEM
Cristalografía (Geología)
description Back-scattered scanning electron microscopy (SEM) images of Cr-chlorite crystals from Erzerum (Turkey) reveal that the crystals are chemically inhomogeneous and display complex but well defined crystal zoning characterized by growth bands with contrasting chemical features. The chemical zoning has been investigated at the micron scale using an integrated approach, combining BSEM images, in situ chemical analysis by electron microprobe and Raman spectroscopy. Enrichment in Cr, due to octahedral Al substitution, reaches up to 0.7 atoms per half formula, especially in bands where the Mg content is depleted. These substitutions are also depicted at the micron scale on Raman spectra by changes in the n(OH) band intensities and positions that correlate with the Cr content. The Cr-enrichment occurs thus during specific stages of crystal growth, probably in response to changes in the fluid chemistry controlling the relative availability of Cr, Mg and Al in solution.
publishDate 2003
dc.date.none.fl_str_mv 2003
2003-01-01
2003
2003-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/58320
url https://hdl.handle.net/20.500.14352/58320
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Blackwell Scientific publications
publisher.none.fl_str_mv Blackwell Scientific publications
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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