Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay

Litologias, estrutura e relações embasamento-cobertura na Faixa de Xistos do Cinturão Dom Feliciano no Uruguai

Masquelín, Enrique - Silva Lara, Hernán - Sánchez Bettucci, Leda - Núñez Demarco, Pablo Andrés - Pascual Echeverría, Sofía - Muzio Sauer, Rossana - Peel Canabal, Elena - Scaglia Cortellezzi, Fernando N.

Resumen:

This work is the result of a multiyear effort to use field geology to describe lithologies, to establish contact relationships and to create a sketch of the tectonic evolution of the Meso- to Neoproterozoic metasedimentary successions within the Schist Belt of the Dom Feliciano Belt. This low-grade metamorphic cover rests on the high-grade metamorphic basement of the La China and Las Tetas complexes. This basement is Archean-Paleoproterozoic in age. The Schist Belt is overlapped unconformably by the Barriga Negra formation. The Lavalleja complex and the Barriga Negra formation both deformed together during the D2 deformation event (∼ 570 -540 Ma), but the Barriga Negra only partially recorded the D2 transpressive event, whereas the Lavalleja complex was affected by both the D1 tangential event and the D2 event. Event D1 would have developed a fold nappe with vergence to the south. This hypothesis is supported by different structures: (i) recumbent and upright folds oriented E-W, (ii) subhorizontal mylonitic foliation in marbles (calc-schists), (iii) stretching lineations plunging towards the SW in metaconglomerates of the Las Tetas Complex, and (iv) a reworking of the subhorizontal foliation parallel to the Sarandí del Yí strike-slip shear zone.


Este trabalho resulta de um esforço de vários anos tentando usar a geologia de campo para descrever litologias, estabelecer relações de contato e perfazer a evolução tectônica das sucessões metassedimentares, de idades meso a neoproterozoicas, que foram deformadas dentro da Faixa de Xistos do Cinturão Dom Feliciano. Essas rochas constituem uma cobertura de baixo grau que repousa em cima do embasamento de alto grau metamórfico dos complexos La China e Las Tetas. Esse embasamento é de idade paleoproterozoica-arqueana. A Faixa de Xistos é sotoposta em discordância angular pela formação Barriga Negra. O Complexo Lavalleja e a formação Barriga Negra se deformaram junto durante o evento D2 (~ 570 – 540 Ma), mas a formação Barriga Negra registrou apenas parcialmente o evento transpressivo D2, enquanto o Complexo Lavalleja foi afetado pelos dois eventos (D1 e D2). O evento D1 teria desenvolvido uma dobra – nappe com vergencia para o sul. Essa hipótese é sustentada por diferentes estruturas: (i) dobras recumbentes e dobras retas orientadas E-W, (ii) Foliação subhorizontal milonítica em mármores (calco-xistos); (iii) lineações de estiramento mergulhando para SW em metaconglomerados do Complexo Las Tetas, e (iv) retrabalhamento da foliação subhorizontal, paralelamente à zona de cisalhamento transcorrente Sarandí del Yí


Detalles Bibliográficos
2017
Deformation
Dom Feliciano Belt
Ediacaran
Fold nappe
Tectonic evolution
Inglés
Universidad de la República
COLIBRI
https://hdl.handle.net/20.500.12008/26280
Acceso abierto
Licencia Creative Commons Atribución (CC - By 4.0)
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author Masquelín, Enrique
author2 Silva Lara, Hernán
Sánchez Bettucci, Leda
Núñez Demarco, Pablo Andrés
Pascual Echeverría, Sofía
Muzio Sauer, Rossana
Peel Canabal, Elena
Scaglia Cortellezzi, Fernando N.
author2_role author
author
author
author
author
author
author
author_facet Masquelín, Enrique
Silva Lara, Hernán
Sánchez Bettucci, Leda
Núñez Demarco, Pablo Andrés
Pascual Echeverría, Sofía
Muzio Sauer, Rossana
Peel Canabal, Elena
Scaglia Cortellezzi, Fernando N.
author_role author
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collection COLIBRI
dc.contributor.filiacion.none.fl_str_mv Masquelin Henri, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas
Silva Lara Hernán, Univeridad de la República (Uruguay). CSIC
Sánchez Bettucci Leda, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas
Núñez Demarco Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas
Pascual Sofía, Universidad de la República (Uruguay). Facultad de Ciencias. PEDECIBA
Muzio Rossana, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas
Peel Elena, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas
Scaglia Fernando, Universidad de la República (Uruguay). Facultad de Ciencias. PEDECIBA
dc.creator.none.fl_str_mv Masquelín, Enrique
Silva Lara, Hernán
Sánchez Bettucci, Leda
Núñez Demarco, Pablo Andrés
Pascual Echeverría, Sofía
Muzio Sauer, Rossana
Peel Canabal, Elena
Scaglia Cortellezzi, Fernando N.
dc.date.accessioned.none.fl_str_mv 2021-01-07T15:37:01Z
dc.date.available.none.fl_str_mv 2021-01-07T15:37:01Z
dc.date.issued.none.fl_str_mv 2017
dc.description.abstract.none.fl_txt_mv This work is the result of a multiyear effort to use field geology to describe lithologies, to establish contact relationships and to create a sketch of the tectonic evolution of the Meso- to Neoproterozoic metasedimentary successions within the Schist Belt of the Dom Feliciano Belt. This low-grade metamorphic cover rests on the high-grade metamorphic basement of the La China and Las Tetas complexes. This basement is Archean-Paleoproterozoic in age. The Schist Belt is overlapped unconformably by the Barriga Negra formation. The Lavalleja complex and the Barriga Negra formation both deformed together during the D2 deformation event (∼ 570 -540 Ma), but the Barriga Negra only partially recorded the D2 transpressive event, whereas the Lavalleja complex was affected by both the D1 tangential event and the D2 event. Event D1 would have developed a fold nappe with vergence to the south. This hypothesis is supported by different structures: (i) recumbent and upright folds oriented E-W, (ii) subhorizontal mylonitic foliation in marbles (calc-schists), (iii) stretching lineations plunging towards the SW in metaconglomerates of the Las Tetas Complex, and (iv) a reworking of the subhorizontal foliation parallel to the Sarandí del Yí strike-slip shear zone.
Este trabalho resulta de um esforço de vários anos tentando usar a geologia de campo para descrever litologias, estabelecer relações de contato e perfazer a evolução tectônica das sucessões metassedimentares, de idades meso a neoproterozoicas, que foram deformadas dentro da Faixa de Xistos do Cinturão Dom Feliciano. Essas rochas constituem uma cobertura de baixo grau que repousa em cima do embasamento de alto grau metamórfico dos complexos La China e Las Tetas. Esse embasamento é de idade paleoproterozoica-arqueana. A Faixa de Xistos é sotoposta em discordância angular pela formação Barriga Negra. O Complexo Lavalleja e a formação Barriga Negra se deformaram junto durante o evento D2 (~ 570 – 540 Ma), mas a formação Barriga Negra registrou apenas parcialmente o evento transpressivo D2, enquanto o Complexo Lavalleja foi afetado pelos dois eventos (D1 e D2). O evento D1 teria desenvolvido uma dobra – nappe com vergencia para o sul. Essa hipótese é sustentada por diferentes estruturas: (i) dobras recumbentes e dobras retas orientadas E-W, (ii) Foliação subhorizontal milonítica em mármores (calco-xistos); (iii) lineações de estiramento mergulhando para SW em metaconglomerados do Complexo Las Tetas, e (iv) retrabalhamento da foliação subhorizontal, paralelamente à zona de cisalhamento transcorrente Sarandí del Yí
dc.format.extent.es.fl_str_mv 22 h.
dc.format.mimetype.es.fl_str_mv application/pdf
dc.identifier.citation.es.fl_str_mv Masquelin, H, Silva Lara, H, Sánchez Bettucci, L y otros. "Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay". Brazilian Journal of Geology. [en línea] 2017, 47 (1), pp. 21-42. 22 h. doi 10.1590/2317-4889201720160119
dc.identifier.doi.none.fl_str_mv 10.1590/2317-4889201720160119
dc.identifier.issn.none.fl_str_mv 2317-4889
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12008/26280
dc.language.iso.none.fl_str_mv en
eng
dc.publisher.es.fl_str_mv Sociedade Brasileira de Geologia
dc.relation.ispartof.es.fl_str_mv Brazilian Journal of Geology, 2017, 47(1), pp. 21-42.
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 Deformation
Dom Feliciano Belt
Ediacaran
Fold nappe
Tectonic evolution
dc.title.none.fl_str_mv Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
Litologias, estrutura e relações embasamento-cobertura na Faixa de Xistos do Cinturão Dom Feliciano no Uruguai
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 This work is the result of a multiyear effort to use field geology to describe lithologies, to establish contact relationships and to create a sketch of the tectonic evolution of the Meso- to Neoproterozoic metasedimentary successions within the Schist Belt of the Dom Feliciano Belt. This low-grade metamorphic cover rests on the high-grade metamorphic basement of the La China and Las Tetas complexes. This basement is Archean-Paleoproterozoic in age. The Schist Belt is overlapped unconformably by the Barriga Negra formation. The Lavalleja complex and the Barriga Negra formation both deformed together during the D2 deformation event (∼ 570 -540 Ma), but the Barriga Negra only partially recorded the D2 transpressive event, whereas the Lavalleja complex was affected by both the D1 tangential event and the D2 event. Event D1 would have developed a fold nappe with vergence to the south. This hypothesis is supported by different structures: (i) recumbent and upright folds oriented E-W, (ii) subhorizontal mylonitic foliation in marbles (calc-schists), (iii) stretching lineations plunging towards the SW in metaconglomerates of the Las Tetas Complex, and (iv) a reworking of the subhorizontal foliation parallel to the Sarandí del Yí strike-slip shear zone.
eu_rights_str_mv openAccess
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identifier_str_mv Masquelin, H, Silva Lara, H, Sánchez Bettucci, L y otros. "Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay". Brazilian Journal of Geology. [en línea] 2017, 47 (1), pp. 21-42. 22 h. doi 10.1590/2317-4889201720160119
2317-4889
10.1590/2317-4889201720160119
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rights_invalid_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
spelling Masquelin Henri, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias GeológicasSilva Lara Hernán, Univeridad de la República (Uruguay). CSICSánchez Bettucci Leda, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias GeológicasNúñez Demarco Pablo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias GeológicasPascual Sofía, Universidad de la República (Uruguay). Facultad de Ciencias. PEDECIBAMuzio Rossana, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias GeológicasPeel Elena, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias GeológicasScaglia Fernando, Universidad de la República (Uruguay). Facultad de Ciencias. PEDECIBA2021-01-07T15:37:01Z2021-01-07T15:37:01Z2017Masquelin, H, Silva Lara, H, Sánchez Bettucci, L y otros. "Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay". Brazilian Journal of Geology. [en línea] 2017, 47 (1), pp. 21-42. 22 h. doi 10.1590/2317-48892017201601192317-4889https://hdl.handle.net/20.500.12008/2628010.1590/2317-4889201720160119This work is the result of a multiyear effort to use field geology to describe lithologies, to establish contact relationships and to create a sketch of the tectonic evolution of the Meso- to Neoproterozoic metasedimentary successions within the Schist Belt of the Dom Feliciano Belt. This low-grade metamorphic cover rests on the high-grade metamorphic basement of the La China and Las Tetas complexes. This basement is Archean-Paleoproterozoic in age. The Schist Belt is overlapped unconformably by the Barriga Negra formation. The Lavalleja complex and the Barriga Negra formation both deformed together during the D2 deformation event (∼ 570 -540 Ma), but the Barriga Negra only partially recorded the D2 transpressive event, whereas the Lavalleja complex was affected by both the D1 tangential event and the D2 event. Event D1 would have developed a fold nappe with vergence to the south. This hypothesis is supported by different structures: (i) recumbent and upright folds oriented E-W, (ii) subhorizontal mylonitic foliation in marbles (calc-schists), (iii) stretching lineations plunging towards the SW in metaconglomerates of the Las Tetas Complex, and (iv) a reworking of the subhorizontal foliation parallel to the Sarandí del Yí strike-slip shear zone.Este trabalho resulta de um esforço de vários anos tentando usar a geologia de campo para descrever litologias, estabelecer relações de contato e perfazer a evolução tectônica das sucessões metassedimentares, de idades meso a neoproterozoicas, que foram deformadas dentro da Faixa de Xistos do Cinturão Dom Feliciano. Essas rochas constituem uma cobertura de baixo grau que repousa em cima do embasamento de alto grau metamórfico dos complexos La China e Las Tetas. Esse embasamento é de idade paleoproterozoica-arqueana. A Faixa de Xistos é sotoposta em discordância angular pela formação Barriga Negra. O Complexo Lavalleja e a formação Barriga Negra se deformaram junto durante o evento D2 (~ 570 – 540 Ma), mas a formação Barriga Negra registrou apenas parcialmente o evento transpressivo D2, enquanto o Complexo Lavalleja foi afetado pelos dois eventos (D1 e D2). O evento D1 teria desenvolvido uma dobra – nappe com vergencia para o sul. Essa hipótese é sustentada por diferentes estruturas: (i) dobras recumbentes e dobras retas orientadas E-W, (ii) Foliação subhorizontal milonítica em mármores (calco-xistos); (iii) lineações de estiramento mergulhando para SW em metaconglomerados do Complexo Las Tetas, e (iv) retrabalhamento da foliação subhorizontal, paralelamente à zona de cisalhamento transcorrente Sarandí del YíSubmitted by Parodi Mónica (mparodi@fcien.edu.uy) on 2021-01-05T15:27:07Z No. of bitstreams: 2 license_rdf: 19875 bytes, checksum: 9fdbed07f52437945402c4e70fa4773e (MD5) 10159023174889201720160119.pdf: 17262436 bytes, checksum: da15f949cccf738329ac3ab7da215a55 (MD5)Approved for entry into archive by Faget Cecilia (lfaget@fcien.edu.uy) on 2021-01-07T15:22:58Z (GMT) No. of bitstreams: 2 license_rdf: 19875 bytes, checksum: 9fdbed07f52437945402c4e70fa4773e (MD5) 10159023174889201720160119.pdf: 17262436 bytes, checksum: da15f949cccf738329ac3ab7da215a55 (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@fic.edu.uy) on 2021-01-07T15:37:01Z (GMT). No. of bitstreams: 2 license_rdf: 19875 bytes, checksum: 9fdbed07f52437945402c4e70fa4773e (MD5) 10159023174889201720160119.pdf: 17262436 bytes, checksum: da15f949cccf738329ac3ab7da215a55 (MD5) Previous issue date: 201722 h.application/pdfenengSociedade Brasileira de GeologiaBrazilian Journal of Geology, 2017, 47(1), pp. 21-42.Las 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)DeformationDom Feliciano BeltEdiacaranFold nappeTectonic evolutionLithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in UruguayLitologias, estrutura e relações embasamento-cobertura na Faixa de Xistos do Cinturão Dom Feliciano no UruguaiArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaMasquelín, EnriqueSilva Lara, HernánSánchez Bettucci, LedaNúñez Demarco, Pablo AndrésPascual Echeverría, SofíaMuzio Sauer, RossanaPeel Canabal, ElenaScaglia Cortellezzi, Fernando N.LICENSElicense.txtlicense.txttext/plain; charset=utf-84267http://localhost:8080/xmlui/bitstream/20.500.12008/26280/5/license.txt6429389a7df7277b72b7924fdc7d47a9MD55CC-LICENSElicense_urllicense_urltext/plain; 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- Universidad de la Repúblicafalse
spellingShingle Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
Masquelín, Enrique
Deformation
Dom Feliciano Belt
Ediacaran
Fold nappe
Tectonic evolution
status_str publishedVersion
title Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
title_full Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
title_fullStr Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
title_full_unstemmed Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
title_short Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
title_sort Lithologies, structure and basement-cover relationships in the schist belt of the Dom Feliciano Belt in Uruguay
topic Deformation
Dom Feliciano Belt
Ediacaran
Fold nappe
Tectonic evolution
url https://hdl.handle.net/20.500.12008/26280