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dc.title Origen de la alunita y la natroalunita del depósito de caolín de Mina Equivocada (Prov. de Río Negro, Argentina) es
dc.type Documento de conferencia es
dcterms.abstract The origin of alunite and natroalunite from a kaolin deposit (Equivocada Mine, Rio Negro Province) has been studied. Chemical analysis showed that alunite is K<sub>0.89</sub> and natroalunite Na<sub>0.97</sub>, in agreement with X ray diffraction data. The high contents of minor elements in alunite, especially Ba and Sr are compatible with a hydrothermal origin in contrast to natroalunite whose very low values suggest a secondary origin. Alunite has a δ<sup>34<sup/>S = +15.9‰ and a δ<sup>18</sup>O = +12.9‰, while in natroalunite these values are -5.8‰ and +19.0‰ respectively. δ<sup>34<sup/>S values suggest that alunite formed from a hypogenic process of hydrothermal origin whereas natroalunite is probably related to a supergen origin. The occurrence of alunite in veins crosscutting the other minerals, indicates that it was the last mineral to crystallize. en
dcterms.extent 5 p. es
dcterms.issued 2006
dcterms.language Español es
dcterms.license Attribution 4.0 International (BY 4.0) es
cic.version info:eu-repo/semantics/publishedVersion es Maiza, Pedro es Marfil, Silvina Andrea es Cardellach, E. es Corbella, M. es
cic.lugarDesarrollo Universidad Nacional del Sur es
dcterms.subject.materia Ingeniería de los Materiales es
dcterms.isPartOf.issue VII MinMet (Buenos Aires, 2006) es
dcterms.isPartOf.series Congreso de Mineralogía y Metalogenia es
cic.isPeerReviewed true es
cic.isFulltext true es


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