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dc.contributor.author
Grecco, Laura Edith
dc.contributor.author
Marfil, Silvina Andrea
dc.contributor.author
Maiza, Pedro Jose
dc.date.available
2018-12-17T20:07:08Z
dc.date.issued
2012-03
dc.identifier.citation
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
dc.identifier.issn
0009-8558
dc.identifier.uri
http://hdl.handle.net/11336/66613
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Mineralogical Soc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Argentina
dc.subject
Dickite
dc.subject
Geochemistry
dc.subject
Kaolinite
dc.subject
Mineralogy
dc.subject.classification
Meteorología y Ciencias Atmosféricas
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Mineralogy and geochemistry of hydrothermal kaolins from the Adelita mine, Patagonia (Argentina); Relation to other mineralization in the area
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-11-26T13:29:18Z
dc.journal.volume
47
dc.journal.number
1
dc.journal.pagination
131-146
dc.journal.pais
Reino Unido
dc.journal.ciudad
Middlesex
dc.description.fil
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
dc.description.fil
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
dc.description.fil
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
dc.journal.title
Clay Minerals (print)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1180/claymin.2012.047.1.131
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/claymin/article/47/1/131/56734/Mineralogy-and-geochemistry-of-hydrothermal
dc.relation.alternativeid
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


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