Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance

Autores
Roda Robles, María Encarnacion; Galliski, Miguel Angel; Roquet, Maria Belen; Hatert, Frederic; Parseval, Philippe de
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nodules of Fe-Mn phosphates are common in the outer core zone of the Cema pegmatite, San Luis Range, Argentina. Two different complex phosphates associations have been distinguished in these nodules. One of them is beusite-wyllieite-sickleriterich (BWS), with varulite and staněkite among the main products of replacement, Fe/(Fe + Mn) values between 0.46 and 0.48 for sicklerite, and MgO values up to 2.14 wt%. The other association is lithiophilite-sicklerite-rich (LS), with varulite and hureaulite among the main secondary products, lower Fe/(Fe + Mn) values, in the range 0.37-0.39 for lithiophilite, and lower MgO contents, invariably below 1 wt%. According to the mineral-chemistry data of these Fe-Mn phosphate nodules, a higher temperature of crystallization is proposed for the BWS association compared to the LS one. The Mn enrichment observed in these phosphates, in a pegmatite that is not highly fractionated, could be explained as a result of the early crystallization of other Fe-(Mg-Mn)-rich minerals, such as schorl, in the border and wall zones of this pegmatite. The crystallization of this silicate would have strongly depleted the activity of Fe in the remaining pegmatite-forming melt.
Fil: Roda Robles, María Encarnacion. Universidad del País Vasco; España
Fil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Roquet, Maria Belen. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Hatert, Frederic. Université de Liège; Bélgica
Fil: Parseval, Philippe de. Université de Toulouse; Francia
Materia
Argentina
Cema
Fe-Mn Phosphates
Granitic Pegmatites
Mineral Compositions
Nodules
San Luis Range
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72713
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/72713
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significanceRoda Robles, María EncarnacionGalliski, Miguel AngelRoquet, Maria BelenHatert, FredericParseval, Philippe deArgentinaCemaFe-Mn PhosphatesGranitic PegmatitesMineral CompositionsNodulesSan Luis Rangehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Nodules of Fe-Mn phosphates are common in the outer core zone of the Cema pegmatite, San Luis Range, Argentina. Two different complex phosphates associations have been distinguished in these nodules. One of them is beusite-wyllieite-sickleriterich (BWS), with varulite and staněkite among the main products of replacement, Fe/(Fe + Mn) values between 0.46 and 0.48 for sicklerite, and MgO values up to 2.14 wt%. The other association is lithiophilite-sicklerite-rich (LS), with varulite and hureaulite among the main secondary products, lower Fe/(Fe + Mn) values, in the range 0.37-0.39 for lithiophilite, and lower MgO contents, invariably below 1 wt%. According to the mineral-chemistry data of these Fe-Mn phosphate nodules, a higher temperature of crystallization is proposed for the BWS association compared to the LS one. The Mn enrichment observed in these phosphates, in a pegmatite that is not highly fractionated, could be explained as a result of the early crystallization of other Fe-(Mg-Mn)-rich minerals, such as schorl, in the border and wall zones of this pegmatite. The crystallization of this silicate would have strongly depleted the activity of Fe in the remaining pegmatite-forming melt.Fil: Roda Robles, María Encarnacion. Universidad del País Vasco; EspañaFil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Roquet, Maria Belen. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Hatert, Frederic. Université de Liège; BélgicaFil: Parseval, Philippe de. Université de Toulouse; FranciaMineralogical Association of Canada2012-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72713Roda Robles, María Encarnacion; Galliski, Miguel Angel; Roquet, Maria Belen; Hatert, Frederic; Parseval, Philippe de; Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance; Mineralogical Association of Canada; Canadian Mineralogist; 50; 4; 8-2012; 913-9310008-4476CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3749/canmin.50.4.913info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/canmin/article/50/4/913/127395/phosphate-nodules-containing-two-distinctinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:12:03Zoai:ri.conicet.gov.ar:11336/72713instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-11-05 10:12:04.184CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
title Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
spellingShingle Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
Roda Robles, María Encarnacion
Argentina
Cema
Fe-Mn Phosphates
Granitic Pegmatites
Mineral Compositions
Nodules
San Luis Range
title_short Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
title_full Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
title_fullStr Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
title_full_unstemmed Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
title_sort Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance
dc.creator.none.fl_str_mv Roda Robles, María Encarnacion
Galliski, Miguel Angel
Roquet, Maria Belen
Hatert, Frederic
Parseval, Philippe de
author Roda Robles, María Encarnacion
author_facet Roda Robles, María Encarnacion
Galliski, Miguel Angel
Roquet, Maria Belen
Hatert, Frederic
Parseval, Philippe de
author_role author
author2 Galliski, Miguel Angel
Roquet, Maria Belen
Hatert, Frederic
Parseval, Philippe de
author2_role author
author
author
author
dc.subject.none.fl_str_mv Argentina
Cema
Fe-Mn Phosphates
Granitic Pegmatites
Mineral Compositions
Nodules
San Luis Range
topic Argentina
Cema
Fe-Mn Phosphates
Granitic Pegmatites
Mineral Compositions
Nodules
San Luis Range
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Nodules of Fe-Mn phosphates are common in the outer core zone of the Cema pegmatite, San Luis Range, Argentina. Two different complex phosphates associations have been distinguished in these nodules. One of them is beusite-wyllieite-sickleriterich (BWS), with varulite and staněkite among the main products of replacement, Fe/(Fe + Mn) values between 0.46 and 0.48 for sicklerite, and MgO values up to 2.14 wt%. The other association is lithiophilite-sicklerite-rich (LS), with varulite and hureaulite among the main secondary products, lower Fe/(Fe + Mn) values, in the range 0.37-0.39 for lithiophilite, and lower MgO contents, invariably below 1 wt%. According to the mineral-chemistry data of these Fe-Mn phosphate nodules, a higher temperature of crystallization is proposed for the BWS association compared to the LS one. The Mn enrichment observed in these phosphates, in a pegmatite that is not highly fractionated, could be explained as a result of the early crystallization of other Fe-(Mg-Mn)-rich minerals, such as schorl, in the border and wall zones of this pegmatite. The crystallization of this silicate would have strongly depleted the activity of Fe in the remaining pegmatite-forming melt.
Fil: Roda Robles, María Encarnacion. Universidad del País Vasco; España
Fil: Galliski, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Roquet, Maria Belen. Universidad Nacional de San Luis. Facultad de Ciencias Físico- Matemáticas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Hatert, Frederic. Université de Liège; Bélgica
Fil: Parseval, Philippe de. Université de Toulouse; Francia
description Nodules of Fe-Mn phosphates are common in the outer core zone of the Cema pegmatite, San Luis Range, Argentina. Two different complex phosphates associations have been distinguished in these nodules. One of them is beusite-wyllieite-sickleriterich (BWS), with varulite and staněkite among the main products of replacement, Fe/(Fe + Mn) values between 0.46 and 0.48 for sicklerite, and MgO values up to 2.14 wt%. The other association is lithiophilite-sicklerite-rich (LS), with varulite and hureaulite among the main secondary products, lower Fe/(Fe + Mn) values, in the range 0.37-0.39 for lithiophilite, and lower MgO contents, invariably below 1 wt%. According to the mineral-chemistry data of these Fe-Mn phosphate nodules, a higher temperature of crystallization is proposed for the BWS association compared to the LS one. The Mn enrichment observed in these phosphates, in a pegmatite that is not highly fractionated, could be explained as a result of the early crystallization of other Fe-(Mg-Mn)-rich minerals, such as schorl, in the border and wall zones of this pegmatite. The crystallization of this silicate would have strongly depleted the activity of Fe in the remaining pegmatite-forming melt.
publishDate 2012
dc.date.none.fl_str_mv 2012-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/72713
Roda Robles, María Encarnacion; Galliski, Miguel Angel; Roquet, Maria Belen; Hatert, Frederic; Parseval, Philippe de; Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance; Mineralogical Association of Canada; Canadian Mineralogist; 50; 4; 8-2012; 913-931
0008-4476
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72713
identifier_str_mv Roda Robles, María Encarnacion; Galliski, Miguel Angel; Roquet, Maria Belen; Hatert, Frederic; Parseval, Philippe de; Phosphate nodules containing two distinct assemblages in the Cema Granitic Pegmatite, San Luis Province, Argentina: Paragenesis, composition and significance; Mineralogical Association of Canada; Canadian Mineralogist; 50; 4; 8-2012; 913-931
0008-4476
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3749/canmin.50.4.913
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/canmin/article/50/4/913/127395/phosphate-nodules-containing-two-distinct
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Mineralogical Association of Canada
publisher.none.fl_str_mv Mineralogical Association of Canada
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.087074

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