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dc.contributor.author
Gaucher, Claudio  
dc.contributor.author
Frei, Robert  
dc.contributor.author
Samaniego, Lucía  
dc.contributor.author
Will, Thomas M.  
dc.contributor.author
Chemale, Farid  
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Gargiulo, Maria Florencia  
dc.contributor.author
Poire, Daniel Gustavo  
dc.contributor.author
Ling, Xiaoxiao  
dc.contributor.author
Li, Xian Hua  
dc.contributor.author
Li, Qiu Li  
dc.date.available
2021-08-09T19:51:30Z  
dc.date.issued
2021-01  
dc.identifier.citation
Gaucher, Claudio; Frei, Robert; Samaniego, Lucía; Will, Thomas M.; Chemale, Farid; et al.; The Tapes Complex (Nico Pérez Terrane, Uruguay): Constraining the Mesoproterozoic evolution of the Río de la Plata Craton; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 105; 1-2021; 1-30; 102906  
dc.identifier.issn
0895-9811  
dc.identifier.uri
http://hdl.handle.net/11336/138057  
dc.description.abstract
The Tapes Complex crops out in the southeastern Nico Pérez Terrane (NPT) of the Río de la Plata Craton and forms part of a NE-trending Mesoproterozoic belt together with the Calymmian (1.48–1.43 Ga) Parque UTE and Mina Verdún groups. The complex is characterized by interbedded/tectonically interleaved metasedimentary (mainly siliciclastic) and metaultramafic rocks, with subordinate intercalations of metabasites, carbonate and chert, all metamorphosed in the greenschist facies. The age of the Tapes Complex is constrained by: (i) a U–Pb SIMS age of 1360 ± 12 Ma for the youngest detrital zircon, (ii) the K–Ar age of 1253 ± 32 Ma for synkinematic muscovite of the Zapicán thrust, which affects the unit, and (iii) an Sm–Nd isochronic age of 1403 ± 150 Ma for ultramafic and mafic rocks. The intruding Tapes Chico Syenite yielded a much younger U–Pb SIMS age of 601 ± 5 Ma, associated with Brasiliano-Pan African tectonism, negative εHf values (mean = −31), δ18O zircon ratios ranging between 5.45 and 6.68‰ V-SMOW and inherited zircons dated at 1774-1756 Ma. The best preserved mafic and ultramafic samples yielded Nd model ages (TDM) between 1.55 and 1.68 Ga, close to the assumed crystallization age, and positive εNd(t). Nd model ages of metasedimentary rocks vary between 1.8 and 3.1 Ga, which is interpreted as reflecting two contrasting sources: Archean units of the NPT and Mesoproterozoic mafic and ultramafic rocks, including fragments of oceanic crust. Chondrite-normalized REE patterns of metasedimentary rocks are characterized by LREE enrichment and lack of an Eu anomaly, similar to REE patterns of co-occurring metabasalts. High MgO concentrations, high Cr/V and low Y/Ni and Th/Sc ratios imply the involvement of ultramafic rocks in the source area, which is also supported by whole-rock Pb isotope data. A geodynamic evolution is envisaged, from an extensional tectonic setting between 1.48–1.43 Ga (rift or retroarc basin) into a compressional, retroarc foreland basin at ca. 1.25–1.20 Ga, the latter being probably related to the Kibaran Orogeny in the Namaqua-Natal Belt. It is proposed that the corresponding arc granites and high-grade metamorphic rocks are likely to be found in one of the several terranes in the Namaqua sector of the belt. The Apiaí Terrane (Ribeira Belt, Brazil) shows a similar geological record and evolution as the NPT, and maybe a fragment of the latter displaced to the NW by the Ibaré Shear Zone. The Tapes Complex is a key unit for understanding the assembly of the Río de la Plata and Kalahari cratons, and their incorporation into the Rodinia supercontinent.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pergamon-Elsevier Science Ltd  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
ECTASIAN  
dc.subject
GRENVILLIAN  
dc.subject
KALAHARI CRATON  
dc.subject
NAMAQUA BELT  
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RODINIA  
dc.subject.classification
Geología  
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
The Tapes Complex (Nico Pérez Terrane, Uruguay): Constraining the Mesoproterozoic evolution of the Río de la Plata Craton  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2021-07-21T16:52:05Z  
dc.journal.volume
105  
dc.journal.pagination
1-30; 102906  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Gaucher, Claudio. Universidad de la República; Uruguay  
dc.description.fil
Fil: Frei, Robert. Universidad de Copenhagen; Dinamarca  
dc.description.fil
Fil: Samaniego, Lucía. Centro Regional para la Gestión de Aguas Subterráneas; Uruguay. Universidad de la República; Uruguay  
dc.description.fil
Fil: Will, Thomas M.. Universität Würzburg; Alemania  
dc.description.fil
Fil: Chemale, Farid. Universidad de Vale do Rio dos Sinos; Brasil  
dc.description.fil
Fil: Gargiulo, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina  
dc.description.fil
Fil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina  
dc.description.fil
Fil: Ling, Xiaoxiao. Chinese Academy of Sciences. Institute of Geology and Geophysics. State Key Laboratory of Lithospheric Evolution; China  
dc.description.fil
Fil: Li, Xian Hua. Chinese Academy of Sciences. Institute of Geology and Geophysics. State Key Laboratory of Lithospheric Evolution; China  
dc.description.fil
Fil: Li, Qiu Li. Universidad de Copenhagen; Dinamarca  
dc.journal.title
Journal of South American Earth Sciences  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981120304491  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.jsames.2020.102906