Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza

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The main mineralizations of the Sierra Pintada uranium district, San Rafael Massif, Mendoza, are associated with the Choiyoi volcanic province. In the lower section of this magmatic cycle uranium deposits hosted by epiclastic sandstones are predominant. In the upper section, small vein-type deposits...

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Autores principales: Japas, M.S., Salvarredi, J.A., Kleiman, L.E.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2008
Materias:
Choiyoi
Mineralizations
Permian
San Rafael
Strain fabric
Structural control
deformation mechanism
economic geology
magmatism
mineralization
ore deposit
orogeny
sandstone
sedimentary sequence
spatial distribution
structural control
transpression
transtension
uranium
Argentina
Mendoza
San Rafael Massif
Sierra Pintada Mine
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v63_n2_p204_Japas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00044822_v63_n2_p204_Japas2023-06-12T16:40:15Z Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza Rev. Asoc. Geol. Argent. 2008;63(2):204-212 Japas, M.S. Salvarredi, J.A. Kleiman, L.E. Choiyoi Mineralizations Permian San Rafael Strain fabric Structural control deformation mechanism economic geology magmatism mineralization ore deposit orogeny Permian sandstone sedimentary sequence spatial distribution structural control transpression transtension uranium Argentina Mendoza San Rafael Massif Sierra Pintada Mine South America The main mineralizations of the Sierra Pintada uranium district, San Rafael Massif, Mendoza, are associated with the Choiyoi volcanic province. In the lower section of this magmatic cycle uranium deposits hosted by epiclastic sandstones are predominant. In the upper section, small vein-type deposits of low economic significance are found instead. During the emplacement of these Permian volcanic and sedimentary sequences two different stress regimes, which conditioned the mineralizing systems, were dominant: transpressional (San Rafael orogenic phase) and transtensional (post-orogenic stage). A strain fabric analyses was performed in an attempt to evaluate the control exerted by the structures in the distribution of the uranium mineralizations during these two stages of deformation. So that, a contribution to a better understanding of the genesis of these deposits will aid to the generation of new exploration guides for uranium in the Choiyoi province. In the case of the deposits related to the lower Choiyoi, three orders of magnitude could be defined for the structural control. The fabric of the structures determining the distribution of these mineralizations reflects the structural grain of the San Rafael orogeny. The deposition of uranium hosted by the upper Choiyoi sequences was directly or indirectly influenced by the structures generated under the post-sanrafaelic stress field. Fil:Japas, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kleiman, L.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v63_n2_p204_Japas
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Choiyoi
Mineralizations
Permian
San Rafael
Strain fabric
Structural control
deformation mechanism
economic geology
magmatism
mineralization
ore deposit
orogeny
Permian
sandstone
sedimentary sequence
spatial distribution
structural control
transpression
transtension
uranium
Argentina
Mendoza
San Rafael Massif
Sierra Pintada Mine
South America
spellingShingle Choiyoi
Mineralizations
Permian
San Rafael
Strain fabric
Structural control
deformation mechanism
economic geology
magmatism
mineralization
ore deposit
orogeny
Permian
sandstone
sedimentary sequence
spatial distribution
structural control
transpression
transtension
uranium
Argentina
Mendoza
San Rafael Massif
Sierra Pintada Mine
South America
Japas, M.S.
Salvarredi, J.A.
Kleiman, L.E.
Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
topic_facet Choiyoi
Mineralizations
Permian
San Rafael
Strain fabric
Structural control
deformation mechanism
economic geology
magmatism
mineralization
ore deposit
orogeny
Permian
sandstone
sedimentary sequence
spatial distribution
structural control
transpression
transtension
uranium
Argentina
Mendoza
San Rafael Massif
Sierra Pintada Mine
South America
description The main mineralizations of the Sierra Pintada uranium district, San Rafael Massif, Mendoza, are associated with the Choiyoi volcanic province. In the lower section of this magmatic cycle uranium deposits hosted by epiclastic sandstones are predominant. In the upper section, small vein-type deposits of low economic significance are found instead. During the emplacement of these Permian volcanic and sedimentary sequences two different stress regimes, which conditioned the mineralizing systems, were dominant: transpressional (San Rafael orogenic phase) and transtensional (post-orogenic stage). A strain fabric analyses was performed in an attempt to evaluate the control exerted by the structures in the distribution of the uranium mineralizations during these two stages of deformation. So that, a contribution to a better understanding of the genesis of these deposits will aid to the generation of new exploration guides for uranium in the Choiyoi province. In the case of the deposits related to the lower Choiyoi, three orders of magnitude could be defined for the structural control. The fabric of the structures determining the distribution of these mineralizations reflects the structural grain of the San Rafael orogeny. The deposition of uranium hosted by the upper Choiyoi sequences was directly or indirectly influenced by the structures generated under the post-sanrafaelic stress field.
format Artículo
Artículo
publishedVersion
author Japas, M.S.
Salvarredi, J.A.
Kleiman, L.E.
author_facet Japas, M.S.
Salvarredi, J.A.
Kleiman, L.E.
author_sort Japas, M.S.
title Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
title_short Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
title_full Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
title_fullStr Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
title_full_unstemmed Structural control on the distribution of uranium mineralizations of the Choiyoi cycle, San Rafael Massif, Mendoza
title_sort structural control on the distribution of uranium mineralizations of the choiyoi cycle, san rafael massif, mendoza
publishDate 2008
url http://hdl.handle.net/20.500.12110/paper_00044822_v63_n2_p204_Japas
work_keys_str_mv AT japasms structuralcontrolonthedistributionofuraniummineralizationsofthechoiyoicyclesanrafaelmassifmendoza
AT salvarredija structuralcontrolonthedistributionofuraniummineralizationsofthechoiyoicyclesanrafaelmassifmendoza
AT kleimanle structuralcontrolonthedistributionofuraniummineralizationsofthechoiyoicyclesanrafaelmassifmendoza
_version_ 1769810306892038144

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