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dc.title Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina en
dc.type Artículo es
dcterms.abstract The Mamil Choique halloysite deposits of Patagonia, Argentina, contain randomly distributed green clay inclusions and patches within the halloysite mass. Halloysite has been formed from the thorough alteration of rhyolitic to dacitic ash fall tuffs and ignimbrites of the Huitrera Formation, Eocene age, under ambient conditions. The smectites present in the clay inclusions have been determined as ferruginous beidellites with variables amounts of Fe3+ in octahedral sites. The weathering activity that caused the formation of halloysite was also responsible for the genesis of the iron-bearing clay minerals, the formation of which was controlled mainly by permeability. Textural variations within the rock indicate favourable local geochemical environments for the formation of the green clay minerals present. en
dcterms.extent 13 p. es
dcterms.issued 2014
dcterms.language Español es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.spatial Patagonia (Argentina) es
dcterms.subject iron-bearing smectites en
dcterms.subject halloysite en
dcterms.subject weathering en
cic.version info:eu-repo/semantics/submittedVersion es Cravero, Fiorella es Marfil, Silvina Andrea es Ramos, C. P. es Maiza, Pedro es
cic.lugarDesarrollo Centro de Geología Aplicada, Agua y Medio Ambiente es
dcterms.subject.materia Geología es
dcterms.isPartOf.issue vol. 49 es
dcterms.isPartOf.series Clay Minerals es
cic.isPeerReviewed true es
cic.isFulltext true es


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