Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications

Petrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicas

Petrografia sedimentar das formações aflorantes do Sistema Aquífero Guarani e implicações hidrogeológicas

Collazo, Paula - Pamoukaglhian, Karina - Chiglino, Leticia

Editor(es): Pérez-Bidegain, Mario - Celio, Antonella - Gaucher, Claudio

Resumen:

Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay. Sedimentary petrography studies were carried out with the objective of qualitatively and quantitatively evaluate the porosity of sedimentary rocks. To determine the porosity in sandstones, the method of impregnation of petrographic thin sections followed by point-counting of total pore area and interconnected pore area was used. Clast and matrix composition was determined using both optical microscope and scanning electron microscope (SEM), with an energy dispersive X-ray analyzer (EDS) The study shows average values of total porosity of 17% and effective porosity of 14% for the Rivera and Cuchilla Ombú aquifer units and average value of total porosity of 15% and effective porosity of 9% for the Tacuarembó unit. There are compositional differences between sandstones of the Rivera and Tacuarembó formations, the former being essentially quartz-arenites and the latter predominantly subarkoses and sublithic arenites.


Se presentan análisis petrográficos de las Formaciones Rivera, Tacuarembó y Cuchilla Ombú, formaciones sedimentarias que integran el Sistema Acuífero Guaraní aflorante en los Departamentos de Rivera y Tacuarembó, Uruguay. Los estudios de petrografía sedimentaria se llevan a cabo con el objetivo de evaluar cualitativamente y cuantitativamente la porosidad de las rocas sedimentarias. Para determinar la porosidad en las areniscas, se utilizó el método de impregnación de cortes petrográficos con conteo de poros totales y conteo de poros interconectados. La composición de los clastos y de la matriz se determinó utilizando microscopio óptico y microscopio electrónico de barrido (SEM) con analizador de rayos X (EDS). El estudio arroja valores medios de porosidad total de 17% y de porosidad efectiva de 14% para las unidades acuíferas Rivera y Cuchilla Ombú y valor medio de porosidad total de 15% y de porosidad efectiva 9% para la unidad Tacuarembó. Hay diferencias composicionales entre areniscas de las Formaciones Rivera y Tacuarembó, las primeras son esencialmente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.


São apresentadas análises petrográficas das Formações Rivera, Tacuarembó e Cuchila Ombú, formações que compõem o afloramento do Sistema Aquífero Guaraní nos Departamentos de Rivera e Tacuarembó, Uruguai. Os estudos de petrografia sedimentar são realizados com objetivo de avaliar qualitativa e quantitativamente a porosidade das rochas sedimentares. Para a determinação da porosidade, foi utilizado o método de impregnação de cortes petrográficos com contagem total de poros e contagem de poros interligados. A composição dos clastos e da matriz é determinada usando um microscópio óptico e um microscópio eletrônico de varredura (SEM) com um analisador de energia dispersa de raios-X (EDS). O estudo apresenta valores médios de porosidade total de 17% e porosidade efetiva de 14% para as unidades dos aquíferos Rivera e Cuchilla Ombú e valores médios de porosidade total de 15% e porosidade efetiva de 9% para a unidade de Tacuarembó. Quanto às diferenças composicionais entre arenitos das Formações Rivera e Tacuarembó, as primeiras são essencialmente quartzo-arenitos e as últimas são predominantemente subarcóseos e sublitarenitos.


Detalles Bibliográficos
2022
Acuífero Guaraní
Aqüífero Guarani
Guaraní Aquifer
Mesozoic
Mesozoico
Mesozóico
Petrografia Sedimentar
Petrografía Sedimentaria
Porosidad
Porosidade
Porosity
Sedimentary Petrography
Inglés
Universidad de la República
COLIBRI
https://hdl.handle.net/20.500.12008/43654
Acceso abierto
Licencia Creative Commons Atribución (CC - By 4.0)
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author Collazo, Paula
author2 Pamoukaglhian, Karina
Chiglino, Leticia
author2_role author
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author_facet Collazo, Paula
Pamoukaglhian, Karina
Chiglino, Leticia
author_role author
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dc.contributor.filiacion.none.fl_str_mv Collazo Paula, Universidad de la República, Facultad de Ciencias, Instituto de Ciencias Geológicas, Montevideo, Uruguay https://orcid.org/0000-0003-2053-7481
Pamoukaglhian Karina, Universidad de la República, Facultad de Ciencias, Instituto de Ciencias Geológicas, Montevideo, Uruguay https://orcid.org/0000-0002-4259-9424
Chiglino Leticia, Universidad de la República, Centro Universitario Regional Este (CURE), Treinta y Tres, Uruguay https://orcid.org/0000-0001-9003-3196
dc.creator.editor.none.fl_str_mv Pérez-Bidegain, Mario
Celio, Antonella
Gaucher, Claudio
dc.creator.none.fl_str_mv Collazo, Paula
Pamoukaglhian, Karina
Chiglino, Leticia
dc.date.accessioned.none.fl_str_mv 2024-04-26T15:11:39Z
dc.date.available.none.fl_str_mv 2024-04-26T15:11:39Z
dc.date.issued.none.fl_str_mv 2022
dc.description.abstract.none.fl_txt_mv Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay. Sedimentary petrography studies were carried out with the objective of qualitatively and quantitatively evaluate the porosity of sedimentary rocks. To determine the porosity in sandstones, the method of impregnation of petrographic thin sections followed by point-counting of total pore area and interconnected pore area was used. Clast and matrix composition was determined using both optical microscope and scanning electron microscope (SEM), with an energy dispersive X-ray analyzer (EDS) The study shows average values of total porosity of 17% and effective porosity of 14% for the Rivera and Cuchilla Ombú aquifer units and average value of total porosity of 15% and effective porosity of 9% for the Tacuarembó unit. There are compositional differences between sandstones of the Rivera and Tacuarembó formations, the former being essentially quartz-arenites and the latter predominantly subarkoses and sublithic arenites.
Se presentan análisis petrográficos de las Formaciones Rivera, Tacuarembó y Cuchilla Ombú, formaciones sedimentarias que integran el Sistema Acuífero Guaraní aflorante en los Departamentos de Rivera y Tacuarembó, Uruguay. Los estudios de petrografía sedimentaria se llevan a cabo con el objetivo de evaluar cualitativamente y cuantitativamente la porosidad de las rocas sedimentarias. Para determinar la porosidad en las areniscas, se utilizó el método de impregnación de cortes petrográficos con conteo de poros totales y conteo de poros interconectados. La composición de los clastos y de la matriz se determinó utilizando microscopio óptico y microscopio electrónico de barrido (SEM) con analizador de rayos X (EDS). El estudio arroja valores medios de porosidad total de 17% y de porosidad efectiva de 14% para las unidades acuíferas Rivera y Cuchilla Ombú y valor medio de porosidad total de 15% y de porosidad efectiva 9% para la unidad Tacuarembó. Hay diferencias composicionales entre areniscas de las Formaciones Rivera y Tacuarembó, las primeras son esencialmente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.
São apresentadas análises petrográficas das Formações Rivera, Tacuarembó e Cuchila Ombú, formações que compõem o afloramento do Sistema Aquífero Guaraní nos Departamentos de Rivera e Tacuarembó, Uruguai. Os estudos de petrografia sedimentar são realizados com objetivo de avaliar qualitativa e quantitativamente a porosidade das rochas sedimentares. Para a determinação da porosidade, foi utilizado o método de impregnação de cortes petrográficos com contagem total de poros e contagem de poros interligados. A composição dos clastos e da matriz é determinada usando um microscópio óptico e um microscópio eletrônico de varredura (SEM) com um analisador de energia dispersa de raios-X (EDS). O estudo apresenta valores médios de porosidade total de 17% e porosidade efetiva de 14% para as unidades dos aquíferos Rivera e Cuchilla Ombú e valores médios de porosidade total de 15% e porosidade efetiva de 9% para a unidade de Tacuarembó. Quanto às diferenças composicionais entre arenitos das Formações Rivera e Tacuarembó, as primeiras são essencialmente quartzo-arenitos e as últimas são predominantemente subarcóseos e sublitarenitos.
dc.format.extent.es.fl_str_mv e506
dc.format.mimetype.es.fl_str_mv application/pdf
dc.identifier.citation.es.fl_str_mv Collazo, P., Pamoukaglhian, K., & Chiglino, L. (2022). Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications. Agrociencia Uruguay, 26(NE1),e506. https://doi.org/10.31285/AGRO.26.506
dc.identifier.doi.none.fl_str_mv 10.31285/AGRO.26.506
dc.identifier.issn.none.fl_str_mv 2730-5066
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12008/43654
dc.language.iso.none.fl_str_mv en
eng
dc.publisher.es.fl_str_mv Facultad de Agronomía, Universidad de la República - INIA
dc.relation.ispartof.es.fl_str_mv Agrociencia Uruguay. 2022;26(NE1):e506
dc.rights.license.none.fl_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
dc.source.none.fl_str_mv reponame:COLIBRI
instname:Universidad de la República
instacron:Universidad de la República
dc.subject.es.fl_str_mv Acuífero Guaraní
Aqüífero Guarani
Guaraní Aquifer
Mesozoic
Mesozoico
Mesozóico
Petrografia Sedimentar
Petrografía Sedimentaria
Porosidad
Porosidade
Porosity
Sedimentary Petrography
dc.title.none.fl_str_mv Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
Petrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicas
Petrografia sedimentar das formações aflorantes do Sistema Aquífero Guarani e implicações hidrogeológicas
dc.type.es.fl_str_mv Artículo
dc.type.none.fl_str_mv info:eu-repo/semantics/article
dc.type.version.none.fl_str_mv info:eu-repo/semantics/publishedVersion
description Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay. Sedimentary petrography studies were carried out with the objective of qualitatively and quantitatively evaluate the porosity of sedimentary rocks. To determine the porosity in sandstones, the method of impregnation of petrographic thin sections followed by point-counting of total pore area and interconnected pore area was used. Clast and matrix composition was determined using both optical microscope and scanning electron microscope (SEM), with an energy dispersive X-ray analyzer (EDS) The study shows average values of total porosity of 17% and effective porosity of 14% for the Rivera and Cuchilla Ombú aquifer units and average value of total porosity of 15% and effective porosity of 9% for the Tacuarembó unit. There are compositional differences between sandstones of the Rivera and Tacuarembó formations, the former being essentially quartz-arenites and the latter predominantly subarkoses and sublithic arenites.
eu_rights_str_mv openAccess
format article
id COLIBRI_b423b80c00572f23013ea36ce5282ae7
identifier_str_mv Collazo, P., Pamoukaglhian, K., & Chiglino, L. (2022). Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications. Agrociencia Uruguay, 26(NE1),e506. https://doi.org/10.31285/AGRO.26.506
2730-5066
10.31285/AGRO.26.506
instacron_str Universidad de la República
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instname_str Universidad de la República
language eng
language_invalid_str_mv en
network_acronym_str COLIBRI
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publishDate 2022
reponame_str COLIBRI
repository.mail.fl_str_mv mabel.seroubian@seciu.edu.uy
repository.name.fl_str_mv COLIBRI - Universidad de la República
repository_id_str 4771
rights_invalid_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
spelling Collazo Paula, Universidad de la República, Facultad de Ciencias, Instituto de Ciencias Geológicas, Montevideo, Uruguay https://orcid.org/0000-0003-2053-7481Pamoukaglhian Karina, Universidad de la República, Facultad de Ciencias, Instituto de Ciencias Geológicas, Montevideo, Uruguay https://orcid.org/0000-0002-4259-9424Chiglino Leticia, Universidad de la República, Centro Universitario Regional Este (CURE), Treinta y Tres, Uruguay https://orcid.org/0000-0001-9003-31962024-04-26T15:11:39Z2024-04-26T15:11:39Z2022Collazo, P., Pamoukaglhian, K., & Chiglino, L. (2022). Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications. Agrociencia Uruguay, 26(NE1),e506. https://doi.org/10.31285/AGRO.26.5062730-5066https://hdl.handle.net/20.500.12008/4365410.31285/AGRO.26.506Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay. Sedimentary petrography studies were carried out with the objective of qualitatively and quantitatively evaluate the porosity of sedimentary rocks. To determine the porosity in sandstones, the method of impregnation of petrographic thin sections followed by point-counting of total pore area and interconnected pore area was used. Clast and matrix composition was determined using both optical microscope and scanning electron microscope (SEM), with an energy dispersive X-ray analyzer (EDS) The study shows average values of total porosity of 17% and effective porosity of 14% for the Rivera and Cuchilla Ombú aquifer units and average value of total porosity of 15% and effective porosity of 9% for the Tacuarembó unit. There are compositional differences between sandstones of the Rivera and Tacuarembó formations, the former being essentially quartz-arenites and the latter predominantly subarkoses and sublithic arenites.Se presentan análisis petrográficos de las Formaciones Rivera, Tacuarembó y Cuchilla Ombú, formaciones sedimentarias que integran el Sistema Acuífero Guaraní aflorante en los Departamentos de Rivera y Tacuarembó, Uruguay. Los estudios de petrografía sedimentaria se llevan a cabo con el objetivo de evaluar cualitativamente y cuantitativamente la porosidad de las rocas sedimentarias. Para determinar la porosidad en las areniscas, se utilizó el método de impregnación de cortes petrográficos con conteo de poros totales y conteo de poros interconectados. La composición de los clastos y de la matriz se determinó utilizando microscopio óptico y microscopio electrónico de barrido (SEM) con analizador de rayos X (EDS). El estudio arroja valores medios de porosidad total de 17% y de porosidad efectiva de 14% para las unidades acuíferas Rivera y Cuchilla Ombú y valor medio de porosidad total de 15% y de porosidad efectiva 9% para la unidad Tacuarembó. Hay diferencias composicionales entre areniscas de las Formaciones Rivera y Tacuarembó, las primeras son esencialmente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.São apresentadas análises petrográficas das Formações Rivera, Tacuarembó e Cuchila Ombú, formações que compõem o afloramento do Sistema Aquífero Guaraní nos Departamentos de Rivera e Tacuarembó, Uruguai. Os estudos de petrografia sedimentar são realizados com objetivo de avaliar qualitativa e quantitativamente a porosidade das rochas sedimentares. Para a determinação da porosidade, foi utilizado o método de impregnação de cortes petrográficos com contagem total de poros e contagem de poros interligados. A composição dos clastos e da matriz é determinada usando um microscópio óptico e um microscópio eletrônico de varredura (SEM) com um analisador de energia dispersa de raios-X (EDS). O estudo apresenta valores médios de porosidade total de 17% e porosidade efetiva de 14% para as unidades dos aquíferos Rivera e Cuchilla Ombú e valores médios de porosidade total de 15% e porosidade efetiva de 9% para a unidade de Tacuarembó. Quanto às diferenças composicionais entre arenitos das Formações Rivera e Tacuarembó, as primeiras são essencialmente quartzo-arenitos e as últimas são predominantemente subarcóseos e sublitarenitos.Submitted by Colombo Cabanas Stephanie (colombo@fagro.edu.uy) on 2024-04-26T13:01:14Z No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 2730-5066-506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5)Approved for entry into archive by Muniz Andrea (rosmeri8@hotmail.com) on 2024-04-26T14:55:15Z (GMT) No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 2730-5066-506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@seciu.edu.uy) on 2024-04-26T15:11:39Z (GMT). No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 2730-5066-506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5) Previous issue date: 2022e506application/pdfenengFacultad de Agronomía, Universidad de la República - INIAAgrociencia Uruguay. 2022;26(NE1):e506Las obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad de la República.(Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución (CC - By 4.0)Acuífero GuaraníAqüífero GuaraniGuaraní AquiferMesozoicMesozoicoMesozóicoPetrografia SedimentarPetrografía SedimentariaPorosidadPorosidadePorositySedimentary PetrographyGuaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implicationsPetrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicasPetrografia sedimentar das formações aflorantes do Sistema Aquífero Guarani e implicações hidrogeológicasArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaCollazo, PaulaPamoukaglhian, KarinaChiglino, LeticiaPérez-Bidegain, MarioCelio, AntonellaGaucher, ClaudioLICENSElicense.txtlicense.txttext/plain; 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- Universidad de la Repúblicafalse
spellingShingle Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
Collazo, Paula
Acuífero Guaraní
Aqüífero Guarani
Guaraní Aquifer
Mesozoic
Mesozoico
Mesozóico
Petrografia Sedimentar
Petrografía Sedimentaria
Porosidad
Porosidade
Porosity
Sedimentary Petrography
status_str publishedVersion
title Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
title_full Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
title_fullStr Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
title_full_unstemmed Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
title_short Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
title_sort Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
topic Acuífero Guaraní
Aqüífero Guarani
Guaraní Aquifer
Mesozoic
Mesozoico
Mesozóico
Petrografia Sedimentar
Petrografía Sedimentaria
Porosidad
Porosidade
Porosity
Sedimentary Petrography
url https://hdl.handle.net/20.500.12008/43654