Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications
Petrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicas
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 compo-sitional 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 porostotales 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 esencial-mente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.
2022 | |
Guaraní Aquifer System Porosity Sedimentary petrography Mesozoic |
|
Inglés | |
Universidad de la República | |
COLIBRI | |
https://hdl.handle.net/20.500.12008/41418 | |
Acceso abierto | |
Licencia Creative Commons Atribución (CC - By 4.0) |
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---|---|
author | Collazo, Paula |
author2 | Pamoukaghlián, Karina Chiglino, Leticia |
author2_role | author author |
author_facet | Collazo, Paula Pamoukaghlián, Karina Chiglino, Leticia |
author_role | author |
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collection | COLIBRI |
dc.contributor.filiacion.none.fl_str_mv | Collazo Paula, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas. Pamoukaghlián Karina, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas. Chiglino Leticia, Universidad de la República (Uruguay). CURE. |
dc.creator.none.fl_str_mv | Collazo, Paula Pamoukaghlián, Karina Chiglino, Leticia |
dc.date.accessioned.none.fl_str_mv | 2023-11-22T14:30:52Z |
dc.date.available.none.fl_str_mv | 2023-11-22T14:30:52Z |
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 compo-sitional 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 porostotales 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 esencial-mente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas. |
dc.format.extent.es.fl_str_mv | 14 h. |
dc.format.mimetype.es.fl_str_mv | application/pdf |
dc.identifier.citation.es.fl_str_mv | Collazo, P, Pamoukaghlián, K y Chiglino, L. "Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications". Agrociencia Uruguay. [en línea] 2022, 26(NE1): e506. 14 h. DOI: 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/20.500.12008/41418 |
dc.language.iso.none.fl_str_mv | en eng |
dc.publisher.es.fl_str_mv | Universidad de la República (Uruguay). Facultad de Agronomía |
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 | Guaraní Aquifer System Porosity Sedimentary petrography Mesozoic |
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 |
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 compo-sitional 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_b7155f354de9809ef0eb8c9fe01e27e5 |
identifier_str_mv | Collazo, P, Pamoukaghlián, K y Chiglino, L. "Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications". Agrociencia Uruguay. [en línea] 2022, 26(NE1): e506. 14 h. DOI: 10.31285/AGRO.26.506 2730-5066 10.31285/AGRO.26.506 |
instacron_str | Universidad de la República |
institution | Universidad de la República |
instname_str | Universidad de la República |
language | eng |
language_invalid_str_mv | en |
network_acronym_str | COLIBRI |
network_name_str | COLIBRI |
oai_identifier_str | oai:colibri.udelar.edu.uy:20.500.12008/41418 |
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 (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas.Pamoukaghlián Karina, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas.Chiglino Leticia, Universidad de la República (Uruguay). CURE.2023-11-22T14:30:52Z2023-11-22T14:30:52Z2022Collazo, P, Pamoukaghlián, K y Chiglino, L. "Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications". Agrociencia Uruguay. [en línea] 2022, 26(NE1): e506. 14 h. DOI: 10.31285/AGRO.26.5062730-5066https://hdl.handle.net/20.500.12008/4141810.31285/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 compo-sitional 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 porostotales 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 esencial-mente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.Submitted by Festari Camila (camifestari@gmail.com) on 2023-11-21T21:36:06Z No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.31285AGRO.26.506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5)Approved for entry into archive by Faget Cecilia (lfaget@fcien.edu.uy) on 2023-11-22T13:49:34Z (GMT) No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.31285AGRO.26.506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@seciu.edu.uy) on 2023-11-22T14:30:52Z (GMT). No. of bitstreams: 2 license_rdf: 24251 bytes, checksum: 71ed42ef0a0b648670f707320be37b90 (MD5) 10.31285AGRO.26.506.pdf: 2236849 bytes, checksum: 0ee173a6826dc36790cdf2d7a6dbba2a (MD5) Previous issue date: 202214 h.application/pdfenengUniversidad de la República (Uruguay). Facultad de AgronomíaAgrociencia 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)Guaraní Aquifer SystemPorositySedimentary petrographyMesozoicGuaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implicationsPetrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicasArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaCollazo, PaulaPamoukaghlián, KarinaChiglino, LeticiaLICENSElicense.txtlicense.txttext/plain; charset=utf-84267http://localhost:8080/xmlui/bitstream/20.500.12008/41418/5/license.txt6429389a7df7277b72b7924fdc7d47a9MD55CC-LICENSElicense_urllicense_urltext/plain; charset=utf-844http://localhost:8080/xmlui/bitstream/20.500.12008/41418/2/license_urla0ebbeafb9d2ec7cbb19d7137ebc392cMD52license_textlicense_texttext/html; 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- Universidad de la Repúblicafalse |
spellingShingle | Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications Collazo, Paula Guaraní Aquifer System Porosity Sedimentary petrography Mesozoic |
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 | Guaraní Aquifer System Porosity Sedimentary petrography Mesozoic |
url | https://hdl.handle.net/20.500.12008/41418 |