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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/66613
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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 Técnicas2025-09-29T09:39:42Zoai: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:34982025-09-29 09:39:42.378CONICET 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 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 application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Mineralogical Soc |
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Mineralogical Soc |
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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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13.070432 |