Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation

The Río Seco de los Castaños Formation (RSC) is one of the ‘pre-Carboniferous units’ outcropping within the San Rafael Block assigned to Upper Silurian–Lower Devonian age. We review the provenance data obtained by petrography and geochemical-isotope analyses as well as the U–Pb detrital zircon ages....

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Autores principales: Cingolani, Carlos Alberto, Uriz, Norberto Javier, Abre, Paulina, Manassero, María Constanza, Stipp Basei, Miguel Angelo
Formato: Libro Capitulo de libro
Lenguaje:Español
Publicado: Springer 2017
Materias:
Geología
Silurian–Devonian
Provenance analysis
Río Seco de los Castaños unit
Chanic phase
Cuyania terrane
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/152055
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-152055
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spelling I19-R120-10915-1520552024-02-07T19:00:18Z http://sedici.unlp.edu.ar/handle/10915/152055 Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation Cingolani, Carlos Alberto Uriz, Norberto Javier Abre, Paulina Manassero, María Constanza Stipp Basei, Miguel Angelo 2017 2023-04-24T19:03:32Z Cingolani, Carlos Alberto Springer es Geología Silurian–Devonian Provenance analysis Río Seco de los Castaños unit Chanic phase Cuyania terrane The Río Seco de los Castaños Formation (RSC) is one of the ‘pre-Carboniferous units’ outcropping within the San Rafael Block assigned to Upper Silurian–Lower Devonian age. We review the provenance data obtained by petrography and geochemical-isotope analyses as well as the U–Pb detrital zircon ages. Comparison with La Horqueta Formation is also discussed. The main components of this marine fine-grained siliciclastic platform are sandstones and mudstones. The conglomerates are restricted to channel fill deposits developed mainly at the Lomitas Negras location. A low anchizone for the RSC was indicated by illite crystallinity index. From the geochemical proxies described above (Manassero et al. in Devonian Change: Case studies in Palaeogeography and Palaeoecology. Geological Society, 2009) a provenance from an unrecycled crust with an average composition similar to depleted compared with average Upper Continental Crust is suggested. TDM ages are within the range of the Mesoproterozoic basement and Palaeozoic supracrustal rocks of the Precordillera-Cuyania terrane. εNd values of the RSC are similar to those from sedimentary rocks from the Lower Palaeozoic carbonate-siliciclastic platform of the San Rafael Block. These data suggest an Early Carboniferous (Mississipian) low-metamorphic (anchizone) event for the unit. It is correlated with the ‘Chanic’ tectonic phase that affected the Precordillera-Cuyania terrane and also linked to the collision of the Chilenia terrane in the western pre-Andean Gondwana margin. As final remarks we can comment that the studied RSC samples show dominant source derivation from Famatinian (Late Cambrian-Devonian) and Pampean-Brasiliano (Neoproterozoic-Early Cambrian) cycles. Detritus derived from the Mesoproterozoic basement are scarce. U–Pb data constrain the maximum sedimentation age of the RSC to the Silurian–Early Devonian. Centro de Investigaciones Geológicas Libro Capitulo de libro http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 183-208
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Geología
Silurian–Devonian
Provenance analysis
Río Seco de los Castaños unit
Chanic phase
Cuyania terrane
spellingShingle Geología
Silurian–Devonian
Provenance analysis
Río Seco de los Castaños unit
Chanic phase
Cuyania terrane
Cingolani, Carlos Alberto
Uriz, Norberto Javier
Abre, Paulina
Manassero, María Constanza
Stipp Basei, Miguel Angelo
Cingolani, Carlos Alberto
Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
topic_facet Geología
Silurian–Devonian
Provenance analysis
Río Seco de los Castaños unit
Chanic phase
Cuyania terrane
description The Río Seco de los Castaños Formation (RSC) is one of the ‘pre-Carboniferous units’ outcropping within the San Rafael Block assigned to Upper Silurian–Lower Devonian age. We review the provenance data obtained by petrography and geochemical-isotope analyses as well as the U–Pb detrital zircon ages. Comparison with La Horqueta Formation is also discussed. The main components of this marine fine-grained siliciclastic platform are sandstones and mudstones. The conglomerates are restricted to channel fill deposits developed mainly at the Lomitas Negras location. A low anchizone for the RSC was indicated by illite crystallinity index. From the geochemical proxies described above (Manassero et al. in Devonian Change: Case studies in Palaeogeography and Palaeoecology. Geological Society, 2009) a provenance from an unrecycled crust with an average composition similar to depleted compared with average Upper Continental Crust is suggested. TDM ages are within the range of the Mesoproterozoic basement and Palaeozoic supracrustal rocks of the Precordillera-Cuyania terrane. εNd values of the RSC are similar to those from sedimentary rocks from the Lower Palaeozoic carbonate-siliciclastic platform of the San Rafael Block. These data suggest an Early Carboniferous (Mississipian) low-metamorphic (anchizone) event for the unit. It is correlated with the ‘Chanic’ tectonic phase that affected the Precordillera-Cuyania terrane and also linked to the collision of the Chilenia terrane in the western pre-Andean Gondwana margin. As final remarks we can comment that the studied RSC samples show dominant source derivation from Famatinian (Late Cambrian-Devonian) and Pampean-Brasiliano (Neoproterozoic-Early Cambrian) cycles. Detritus derived from the Mesoproterozoic basement are scarce. U–Pb data constrain the maximum sedimentation age of the RSC to the Silurian–Early Devonian.
format Libro
Capitulo de libro
author Cingolani, Carlos Alberto
Uriz, Norberto Javier
Abre, Paulina
Manassero, María Constanza
Stipp Basei, Miguel Angelo
Cingolani, Carlos Alberto
author_facet Cingolani, Carlos Alberto
Uriz, Norberto Javier
Abre, Paulina
Manassero, María Constanza
Stipp Basei, Miguel Angelo
Cingolani, Carlos Alberto
author_sort Cingolani, Carlos Alberto
title Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
title_short Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
title_full Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
title_fullStr Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
title_full_unstemmed Silurian-Devonian Land-Sea Interaction within the San Rafael Block, Argentina: Provenance of the Río Seco de los Castaños Formation
title_sort silurian-devonian land-sea interaction within the san rafael block, argentina: provenance of the río seco de los castaños formation
publisher Springer
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/152055
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