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dc.contributor.author
Cravero, Maria Fernanda
dc.contributor.author
Maiza, Pedro Jose
dc.contributor.author
Marfil, Silvina Andrea
dc.date.available
2017-07-13T21:39:49Z
dc.date.issued
2012-08
dc.identifier.citation
Cravero, Maria Fernanda; Maiza, Pedro Jose; Marfil, Silvina Andrea; Halloysite in Argentinian deposits: origin and textural constraints; Mineralogical Soc; Clay Minerals (print); 47; 3; 8-2012; 329-340
dc.identifier.issn
0009-8558
dc.identifier.uri
http://hdl.handle.net/11336/20472
dc.description.abstract
In Argentina, the only halloysite deposits found so far are located in the southwest of the province of Rio Negro. The areas are named Mamil Choique and Buitrera, separated by 50 km in a W–E direction. The deposits are located in pyroclastic rocks, rhyolitic tuffs and ignimbrites. The aim of this paper is to determine the origin of the alteration, any relationship between the processes in Mamil Choique and Buitrera, and the factors which controlled the halloysite formation. The work was based on field work, mineralogical and geochemical studies, form and distribution of the alteration. Fresh as well as altered rocks were collected. The first were studied by petrographic and chemical methods. In altered samples, the clay mineralogy was determined by XRD and textures by SEM and TEM. Chemical analyses on fresh and altered samples were used to characterize the alteration process and the rock composition. It was concluded that halloysite has been formed by weathering in a time range from Middle Eocene to Middle Oligocene and extended along 50 km in a W-E direction, independent of the source rock. Particle morphology depends on the original texture of the rock. Spheroidal halloysite is related to rocks with low porosity and tubular particles are related to rocks with open spaces.
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
Halloysite
dc.subject
Kaolin
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Patagonia
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Argentina
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Geoquímica y Geofísica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Halloysite in Argentinian deposits: origin and textural constraints
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-13T18:30:47Z
dc.journal.volume
47
dc.journal.number
3
dc.journal.pagination
329-340
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Cravero, Maria Fernanda. 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: 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.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
dc.journal.title
Clay Minerals (print)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1180/claymin.2012.047.3.04
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://claymin.geoscienceworld.org/content/47/3/329
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/minsoc/cm/2012/00000047/00000003/art00004
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