Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay
The Dom Feliciano Belt of southern Brazil and Uruguay represents part of a larger Neoproterozoic orogenic system formed during the amalgamation of Western Gondwana. The hinterland and foreland domains in parts of the belt preserve deformation structures and metamorphic assemblages that developed dur...
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| Format: | article |
| Idioma: | anglès |
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2023
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| Accés en línia: | https://hdl.handle.net/20.500.12008/42364 |
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| _version_ | 1868890225094164480 |
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| author | Percival, Jack James |
| author2 | Konopásek, Jirí Oyhantçabal Cironi, Pedro Bernardo Sláma, Jirí Anczkiewicz, Robert |
| author2_role | author author author author |
| author_browse | Anczkiewicz, Robert Konopásek, Jirí Oyhantçabal Cironi, Pedro Bernardo Percival, Jack James Sláma, Jirí |
| author_facet | Percival, Jack James Konopásek, Jirí Oyhantçabal Cironi, Pedro Bernardo Sláma, Jirí Anczkiewicz, Robert |
| author_role | author |
| collection | COLIBRI |
| dc.contributor.none.fl_str_mv | Percival Jack James Konopásek Jirí Oyhantçabal Cironi Pedro Bernardo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas. Sláma Jirí Anczkiewicz Robert |
| dc.creator.none.fl_str_mv | Percival, Jack James Konopásek, Jirí Oyhantçabal Cironi, Pedro Bernardo Sláma, Jirí Anczkiewicz, Robert |
| dc.date.none.fl_str_mv | 2023 2024-02-05T15:08:20Z 2024-02-05T15:08:20Z |
| dc.format.none.fl_str_mv | 34 h. application/pdf |
| dc.identifier.none.fl_str_mv | Percival, J, Konopásek, J, Oyhantçabal Cironi, P, y otros. "Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay". Journal of Metamorphic Geology. [en línea] 2023, 41(7): 997-1030. 34 h. DOI: 10.1111/jmg.12734. 1525-1314 https://hdl.handle.net/20.500.12008/42364 10.1111/jmg.12734 |
| dc.language.none.fl_str_mv | en eng |
| dc.publisher.none.fl_str_mv | Wiley |
| dc.relation.none.fl_str_mv | Journal of Metamorphic Geology, 2023, 41(7): 997-1030. |
| dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess Licencia Creative Commons Atribución (CC - By 4.0) |
| dc.source.none.fl_str_mv | reponame:COLIBRI instname:Universidad de la República instacron:Universidad de la República |
| dc.subject.none.fl_str_mv | Dom Feliciano Belt Neoproterozoic orogenic system |
| dc.title.none.fl_str_mv | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| dc.type.none.fl_str_mv | Artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| description | The Dom Feliciano Belt of southern Brazil and Uruguay represents part of a larger Neoproterozoic orogenic system formed during the amalgamation of Western Gondwana. The hinterland and foreland domains in parts of the belt preserve deformation structures and metamorphic assemblages that developed during early crustal thickening from c. 650 Ma. However, the metamorphic history of the southern foreland, in Uruguay, and its relationship with the hinterland, is not so well understood. We show that metamorphism in the southern hinterland is characterized by near-isothermal decompression from ~10 kbar (~770°C) down to ~6 kbar, reflecting exhumation from depths of ~40 km during convergent thrusting and crustal thickening. This metamorphic event and associated magmatism is constrained by garnet Lu–Hf and zircon U–Pb dating to c. 655–640 Ma, supporting age and P–T constraints from previous studies. In contrast, prograde metamorphism in the foreland supracrustal rocks reached maximum lower-amphibolite facies conditions (~6–7 kbar and ~550–570°C) and is constrained by garnet Lu–Hf dating to 582 ± 23 Ma. An exposed sheet of imbricated foreland basement rocks reached partial melting at upper-amphibolite facies conditions, and metamorphism is similarly constrained to c. 585–570 Ma by monazite U–Pb dating. The data indicate that metamorphism in the foreland occurred during a sinistral transpressional event c. 55–85 Ma after the start of crustal thickening recorded in the hinterland, whereby strain partitioning during sinistral transpression led to imbrication in the foreland and oblique thrusting of the basement over more distal supracrustal rocks. This event is coeval with transpressional deformation in the Kaoko and Gariep belts, indicating a distinct two-stage tectonic history driven by the three-way convergence between the Congo, Kalahari, and South American cratons. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | anni_ec9dee69ef0b519af53aba1220d3aed2 |
| identifier_str_mv | Percival, J, Konopásek, J, Oyhantçabal Cironi, P, y otros. "Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay". Journal of Metamorphic Geology. [en línea] 2023, 41(7): 997-1030. 34 h. DOI: 10.1111/jmg.12734. 1525-1314 10.1111/jmg.12734 |
| 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 | anni |
| network_name_str | oai-lr-anni |
| oai_identifier_str | oai:colibri.udelar.edu.uy:20.500.12008/42364 |
| publishDate | 2023 |
| publishDateSort | 2023 |
| publisher.none.fl_str_mv | Wiley |
| reponame_str | COLIBRI |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | Licencia Creative Commons Atribución (CC - By 4.0) |
| spelling | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, UruguayPercival, Jack JamesKonopásek, JiríOyhantçabal Cironi, Pedro BernardoSláma, JiríAnczkiewicz, RobertDom Feliciano BeltNeoproterozoic orogenic systemThe Dom Feliciano Belt of southern Brazil and Uruguay represents part of a larger Neoproterozoic orogenic system formed during the amalgamation of Western Gondwana. The hinterland and foreland domains in parts of the belt preserve deformation structures and metamorphic assemblages that developed during early crustal thickening from c. 650 Ma. However, the metamorphic history of the southern foreland, in Uruguay, and its relationship with the hinterland, is not so well understood. We show that metamorphism in the southern hinterland is characterized by near-isothermal decompression from ~10 kbar (~770°C) down to ~6 kbar, reflecting exhumation from depths of ~40 km during convergent thrusting and crustal thickening. This metamorphic event and associated magmatism is constrained by garnet Lu–Hf and zircon U–Pb dating to c. 655–640 Ma, supporting age and P–T constraints from previous studies. In contrast, prograde metamorphism in the foreland supracrustal rocks reached maximum lower-amphibolite facies conditions (~6–7 kbar and ~550–570°C) and is constrained by garnet Lu–Hf dating to 582 ± 23 Ma. An exposed sheet of imbricated foreland basement rocks reached partial melting at upper-amphibolite facies conditions, and metamorphism is similarly constrained to c. 585–570 Ma by monazite U–Pb dating. The data indicate that metamorphism in the foreland occurred during a sinistral transpressional event c. 55–85 Ma after the start of crustal thickening recorded in the hinterland, whereby strain partitioning during sinistral transpression led to imbrication in the foreland and oblique thrusting of the basement over more distal supracrustal rocks. This event is coeval with transpressional deformation in the Kaoko and Gariep belts, indicating a distinct two-stage tectonic history driven by the three-way convergence between the Congo, Kalahari, and South American cratons.WileyPercival Jack JamesKonopásek JiríOyhantçabal Cironi Pedro Bernardo, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas.Sláma JiríAnczkiewicz Robert2024-02-05T15:08:20Z2024-02-05T15:08:20Z2023Artículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion34 h.application/pdfPercival, J, Konopásek, J, Oyhantçabal Cironi, P, y otros. "Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay". Journal of Metamorphic Geology. [en línea] 2023, 41(7): 997-1030. 34 h. DOI: 10.1111/jmg.12734.1525-1314https://hdl.handle.net/20.500.12008/4236410.1111/jmg.12734reponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaenengJournal of Metamorphic Geology, 2023, 41(7): 997-1030.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)oai:colibri.udelar.edu.uy:20.500.12008/423642026-04-14T10:10:28Z |
| spellingShingle | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay Percival, Jack James Dom Feliciano Belt Neoproterozoic orogenic system |
| status_str | publishedVersion |
| title | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| title_full | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| title_fullStr | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| title_full_unstemmed | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| title_short | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| title_sort | Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay |
| topic | Dom Feliciano Belt Neoproterozoic orogenic system |
| url | https://hdl.handle.net/20.500.12008/42364 |