Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area

Autores
Grecco, Laura Edith; Marfil, Silvina Andrea; Maiza, Pedro Jose
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The kaolin deposit at the Adelita mine, located in the province of Río Negro (Patagonia, Argentina), was studied. Petrographic studies on thin sections and chemical analyses of major, minor and trace elements on bulk samples were carried out. The kaolin content of the rock ranges from 31% to 65%. The mineralogy of the working front, which is about 45 m thick, varies from the upper zone, where the rock is strongly silicified, stained with iron oxides and carbonated, grading downwards to a kaolinized zone, with a quartz-kaolinite- dickite assemblage with relict lithic particles and a smaller amount of iron oxides, and ending in the deepest zone where dickite, alunite, diaspore, quartz and scarce associated kaolinite occur. The kaolin mineralogy was determined by SEM, XRD, DTA-TG, IR and d18O and dD isotope analyses. The S, Ba and Sr contents are enriched during hydrothermal alteration, whereas Cr, Nb, Ti and lanthanide elements are concentrated mainly during weathering. The (Ba+Sr) concentrations in the samples studied vary between 600 and 6000 ppm and (Ce+Y+La) between 2 and 150 ppm; (Cr+Nb) remains constant for all the samples, whereas (TiO 2+Fe2O3) is below 0.3%. In the hypogene deposits P2O5 is also more abundant and increases with the degree of alteration. Chondritenormalized rare earth element diagram shows a marked enrichment in LREE relative to HREE, with negative europium anomalies and d18O values range between 3.8% and 7.7% and δD between -123% and -103%, suggesting that kaolin formed from the hydrothermal alteration of rhyolitic tuffs. © 2012 The Mineralogical Society.
Fil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Marfil, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
Fil: Maiza, Pedro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Materia
ARGENTINA
DICKITE
GEOCHEMISTRY
KAOLINITE
MINERALOGY
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:11336/66613
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/66613
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the areaGrecco, Laura EdithMarfil, Silvina AndreaMaiza, Pedro JoseARGENTINADICKITEGEOCHEMISTRYKAOLINITEMINERALOGYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The kaolin deposit at the Adelita mine, located in the province of Río Negro (Patagonia, Argentina), was studied. Petrographic studies on thin sections and chemical analyses of major, minor and trace elements on bulk samples were carried out. The kaolin content of the rock ranges from 31% to 65%. The mineralogy of the working front, which is about 45 m thick, varies from the upper zone, where the rock is strongly silicified, stained with iron oxides and carbonated, grading downwards to a kaolinized zone, with a quartz-kaolinite- dickite assemblage with relict lithic particles and a smaller amount of iron oxides, and ending in the deepest zone where dickite, alunite, diaspore, quartz and scarce associated kaolinite occur. The kaolin mineralogy was determined by SEM, XRD, DTA-TG, IR and d18O and dD isotope analyses. The S, Ba and Sr contents are enriched during hydrothermal alteration, whereas Cr, Nb, Ti and lanthanide elements are concentrated mainly during weathering. The (Ba+Sr) concentrations in the samples studied vary between 600 and 6000 ppm and (Ce+Y+La) between 2 and 150 ppm; (Cr+Nb) remains constant for all the samples, whereas (TiO 2+Fe2O3) is below 0.3%. In the hypogene deposits P2O5 is also more abundant and increases with the degree of alteration. Chondritenormalized rare earth element diagram shows a marked enrichment in LREE relative to HREE, with negative europium anomalies and d18O values range between 3.8% and 7.7% and δD between -123% and -103%, suggesting that kaolin formed from the hydrothermal alteration of rhyolitic tuffs. © 2012 The Mineralogical Society.Fil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaFil: Marfil, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Maiza, Pedro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaMineralogical Soc2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/66613Grecco, Laura Edith; Marfil, Silvina Andrea; Maiza, Pedro Jose; Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area; Mineralogical Soc; Clay Minerals (print); 47; 1; 3-2012; 131-1460009-8558CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1180/claymin.2012.047.1.131info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/claymin/article/47/1/131/56734/Mineralogy-and-geochemistry-of-hydrothermalinfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/clay-minerals/article/mineralogy-and-geochemistry-of-hydrothermal-kaolins-from-the-adelita-mine-patagonia-argentina-relation-to-other-mineralization-in-the-area/CD8714BD659A1F40E11674F0A7315118info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:29:11Zoai:ri.conicet.gov.ar:11336/66613instacron: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:34982025-10-15 14:29:11.583CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
title Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
spellingShingle Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
Grecco, Laura Edith
ARGENTINA
DICKITE
GEOCHEMISTRY
KAOLINITE
MINERALOGY
title_short Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
title_full Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
title_fullStr Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
title_full_unstemmed Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
title_sort Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
dc.creator.none.fl_str_mv Grecco, Laura Edith
Marfil, Silvina Andrea
Maiza, Pedro Jose
author Grecco, Laura Edith
author_facet Grecco, Laura Edith
Marfil, Silvina Andrea
Maiza, Pedro Jose
author_role author
author2 Marfil, Silvina Andrea
Maiza, Pedro Jose
author2_role author
author
dc.subject.none.fl_str_mv ARGENTINA
DICKITE
GEOCHEMISTRY
KAOLINITE
MINERALOGY
topic ARGENTINA
DICKITE
GEOCHEMISTRY
KAOLINITE
MINERALOGY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The kaolin deposit at the Adelita mine, located in the province of Río Negro (Patagonia, Argentina), was studied. Petrographic studies on thin sections and chemical analyses of major, minor and trace elements on bulk samples were carried out. The kaolin content of the rock ranges from 31% to 65%. The mineralogy of the working front, which is about 45 m thick, varies from the upper zone, where the rock is strongly silicified, stained with iron oxides and carbonated, grading downwards to a kaolinized zone, with a quartz-kaolinite- dickite assemblage with relict lithic particles and a smaller amount of iron oxides, and ending in the deepest zone where dickite, alunite, diaspore, quartz and scarce associated kaolinite occur. The kaolin mineralogy was determined by SEM, XRD, DTA-TG, IR and d18O and dD isotope analyses. The S, Ba and Sr contents are enriched during hydrothermal alteration, whereas Cr, Nb, Ti and lanthanide elements are concentrated mainly during weathering. The (Ba+Sr) concentrations in the samples studied vary between 600 and 6000 ppm and (Ce+Y+La) between 2 and 150 ppm; (Cr+Nb) remains constant for all the samples, whereas (TiO 2+Fe2O3) is below 0.3%. In the hypogene deposits P2O5 is also more abundant and increases with the degree of alteration. Chondritenormalized rare earth element diagram shows a marked enrichment in LREE relative to HREE, with negative europium anomalies and d18O values range between 3.8% and 7.7% and δD between -123% and -103%, suggesting that kaolin formed from the hydrothermal alteration of rhyolitic tuffs. © 2012 The Mineralogical Society.
Fil: Grecco, Laura Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Marfil, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
Fil: Maiza, Pedro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
description The kaolin deposit at the Adelita mine, located in the province of Río Negro (Patagonia, Argentina), was studied. Petrographic studies on thin sections and chemical analyses of major, minor and trace elements on bulk samples were carried out. The kaolin content of the rock ranges from 31% to 65%. The mineralogy of the working front, which is about 45 m thick, varies from the upper zone, where the rock is strongly silicified, stained with iron oxides and carbonated, grading downwards to a kaolinized zone, with a quartz-kaolinite- dickite assemblage with relict lithic particles and a smaller amount of iron oxides, and ending in the deepest zone where dickite, alunite, diaspore, quartz and scarce associated kaolinite occur. The kaolin mineralogy was determined by SEM, XRD, DTA-TG, IR and d18O and dD isotope analyses. The S, Ba and Sr contents are enriched during hydrothermal alteration, whereas Cr, Nb, Ti and lanthanide elements are concentrated mainly during weathering. The (Ba+Sr) concentrations in the samples studied vary between 600 and 6000 ppm and (Ce+Y+La) between 2 and 150 ppm; (Cr+Nb) remains constant for all the samples, whereas (TiO 2+Fe2O3) is below 0.3%. In the hypogene deposits P2O5 is also more abundant and increases with the degree of alteration. Chondritenormalized rare earth element diagram shows a marked enrichment in LREE relative to HREE, with negative europium anomalies and d18O values range between 3.8% and 7.7% and δD between -123% and -103%, suggesting that kaolin formed from the hydrothermal alteration of rhyolitic tuffs. © 2012 The Mineralogical Society.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
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/11336/66613
Grecco, Laura Edith; Marfil, Silvina Andrea; Maiza, Pedro Jose; Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area; Mineralogical Soc; Clay Minerals (print); 47; 1; 3-2012; 131-146
0009-8558
CONICET Digital
CONICET
url http://hdl.handle.net/11336/66613
identifier_str_mv Grecco, Laura Edith; Marfil, Silvina Andrea; Maiza, Pedro Jose; Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area; Mineralogical Soc; Clay Minerals (print); 47; 1; 3-2012; 131-146
0009-8558
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1180/claymin.2012.047.1.131
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/claymin/article/47/1/131/56734/Mineralogy-and-geochemistry-of-hydrothermal
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/clay-minerals/article/mineralogy-and-geochemistry-of-hydrothermal-kaolins-from-the-adelita-mine-patagonia-argentina-relation-to-other-mineralization-in-the-area/CD8714BD659A1F40E11674F0A7315118
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Mineralogical Soc
publisher.none.fl_str_mv Mineralogical Soc
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 13.22299

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