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dc.contributor.author
Martinez, Juan Cruz
dc.contributor.author
Dristas, Jorge Anastasio
dc.contributor.author
Massonne, Hans J.
dc.contributor.author
Theye, Thomas
dc.date.available
2019-06-12T18:07:34Z
dc.date.issued
2010-06
dc.identifier.citation
Martinez, Juan Cruz; Dristas, Jorge Anastasio; Massonne, Hans J.; Theye, Thomas; A hydrothermal clay mineral assemblage at the Late Proterozoic unconformity in the Buenos Aires Complex - La Tinta Formation, Barker area, Tandilia Ranges (Argentina); Mineralogical Society; Clay Minerals (print); 45; 2; 6-2010; 209-224
dc.identifier.issn
0009-8558
dc.identifier.uri
http://hdl.handle.net/11336/78100
dc.description.abstract
A general alteration pattern of two transitional clay mineral assemblages was determined by petrography and X-ray diffractometry studies at the Tandilia Late Proterozoic unconformity zone, around the Barker locality: (1) K-white mica + chlorite + calcite anatase-rutile secondary quartz (farther from the unconformity) and (2) pyrophyllite + K-white mica + Ti-rich hematite ± aluminium phosphate-sulphate minerals ± tourmaline ± anatase-rutile (closer to the unconformity). The local occurrence of Na in K-white micas and K-Na in pyrophyllite is described for the first time. Possible interlayering with intermediate K-Na mica and paragonite is indicated by detailed X-ray diffraction analyses. A negative Eu anomaly (Eu/Eu* = 0.24), strongly positive Eu anomaly (Eu/Eu* =11.7) and positive Ce anomaly characterized rapid changes from an unaltered basement to the most altered basement and sedimentary rocks at the unconformity. Aluminium phosphate-sulphate minerals dominate patterns of LREE. A model of hydrothermal alteration comparable to that of unconformity-related uranium deposits is presented.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Mineralogical Society
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
Barker Area
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Clay Mineral Assemblage
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Hydrothermal Alteration
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Late-Proterozoic Unconformity
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
A hydrothermal clay mineral assemblage at the Late Proterozoic unconformity in the Buenos Aires Complex - La Tinta Formation, Barker area, Tandilia Ranges (Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-05-23T17:43:50Z
dc.journal.volume
45
dc.journal.number
2
dc.journal.pagination
209-224
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Martinez, Juan Cruz. 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: Dristas, Jorge Anastasio. 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: Massonne, Hans J.. Universität Stuttgart; Alemania
dc.description.fil
Fil: Theye, Thomas. Universität Stuttgart; Alemania
dc.journal.title
Clay Minerals (print)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1180/claymin.2010.045.2.209
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/clay-minerals/article/hydrothermal-clay-mineral-assemblage-at-the-late-proterozoic-unconformity-in-the-buenos-aires-complex-la-tinta-formation-barker-area-tandilia-ranges-argentina/B98307BC45D4616054E9B3983D6B0B05
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