Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen
Fil: Dicaro, Sebastián. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina
Guardado en:
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| Lenguaje: | Inglés |
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Elsevier
2023
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| Acceso en línea: | http://rid.unrn.edu.ar/handle/20.500.12049/10377 https://doi.org/10.1016/j.jsames.2022.104152 |
| Aporte de: |
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I65-R171-20.500.12049-10377 |
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dspace |
| institution |
Universidad Nacional de Río Negro |
| institution_str |
I-65 |
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R-171 |
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Repositorio Institucional Digital de la Universidad Nacional de Río Negro (UNRN) |
| language |
Inglés |
| orig_language_str_mv |
en |
| topic |
Ciencias de la Tierra (General) Geociencias (Multidisciplinar) Igneous-metamorphic basement Paleozoic North Patagonian Andes Migmatites U–Pb zircon geochronology Ciencias de la Tierra (General) Geociencias (Multidisciplinar) |
| spellingShingle |
Ciencias de la Tierra (General) Geociencias (Multidisciplinar) Igneous-metamorphic basement Paleozoic North Patagonian Andes Migmatites U–Pb zircon geochronology Ciencias de la Tierra (General) Geociencias (Multidisciplinar) Dicaro, Sebastián González, Santiago Nicolás Serra Varela, Samanta Heredia, Nemesio Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| topic_facet |
Ciencias de la Tierra (General) Geociencias (Multidisciplinar) Igneous-metamorphic basement Paleozoic North Patagonian Andes Migmatites U–Pb zircon geochronology Ciencias de la Tierra (General) Geociencias (Multidisciplinar) |
| description |
Fil: Dicaro, Sebastián. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina |
| author |
Dicaro, Sebastián González, Santiago Nicolás Serra Varela, Samanta Heredia, Nemesio |
| author_facet |
Dicaro, Sebastián González, Santiago Nicolás Serra Varela, Samanta Heredia, Nemesio |
| author_sort |
Dicaro, Sebastián |
| title |
Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| title_short |
Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| title_full |
Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| title_fullStr |
Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| title_full_unstemmed |
Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen |
| title_sort |
structure and metamorphism of the cushamen complex in sañicó and collón curá-limay rivers confluence: a devonian metamorphic event related to the subduction stage of the gondwanan patagonian orogen |
| publisher |
Elsevier |
| publishDate |
2023 |
| url |
http://rid.unrn.edu.ar/handle/20.500.12049/10377 https://doi.org/10.1016/j.jsames.2022.104152 |
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I65-R171-20.500.12049-103772023-06-16T16:44:18Z application/pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ 2023-01-15 Fil: Dicaro, Sebastián. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina Fil: González, Santiago Nicolás. Universidad Nacional del Comahue, Facultad de Ingeniería, Depto. de Geología y Petróleo. Neuquén, Argentina Fil: Serra Varela, Samanta. Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET). Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina Fil: Heredia, Nemesio. Instituto Geológico y Minero de España. Oviedo, Spain Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen Dicaro, Sebastián González, Santiago Nicolás Serra Varela, Samanta Heredia, Nemesio Ciencias de la Tierra (General) Geociencias (Multidisciplinar) Igneous-metamorphic basement Paleozoic North Patagonian Andes Migmatites U–Pb zircon geochronology Ciencias de la Tierra (General) Geociencias (Multidisciplinar) In the North Patagonian Andes and western North Patagonian Massif, the Cushamen Complex is still a matter of interest in order to unravel the Paleozoic evolution of southwestern Gondwana margin. In this contribution we present new petrographic and structural data from the Cushamen Complex cropping out nearby Sañicó town and Collón Curá and Limay rivers confluence together with U–Pb (Q-ICP-MS) detrital zircon ages. In these areas, this metamorphic complex is composed of migmatites, orthogneisses and calcsilicate rocks, with a Late Devonian metamorphic peak age, intruded by Devonian - lower Carboniferous granites. The regional metamorphic peak would also has been accompanied by the development of a pervasive tectonic foliation and associated isoclinal folds. Devonian - Carboniferous granites crosscut the foliation of the migmatites and would have produced a weak contact metamorphism represented by static recrystallization in quartz grains. The regional metamorphic event can be related to the subduction-related Gondwanan orogenic event. At least two more folding phases and related foliations were identified postdating these granitic intrusions, probably related to the collisional event of the Gondwanan orogeny, late Carboniferous - early Permian in age. Evidence of retrograde metamorphism probably related to the previously mentioned foliations and folds are common. Zircons from a mesosome were analyzed by U–Pb Q-ICP-MS yielding a maximum depositional age of 441.79 ± 1.68 Ma (early Silurian/Rhuddanian) indicating a sedimentation for the protholits probably during middle Silurian, age of the pre-orogenic successions of the Gondwanan cycle in Patagonia. true In the North Patagonian Andes and western North Patagonian Massif, the Cushamen Complex is still a matter of interest in order to unravel the Paleozoic evolution of southwestern Gondwana margin. In this contribution we present new petrographic and structural data from the Cushamen Complex cropping out nearby Sañicó town and Collón Curá and Limay rivers confluence together with U–Pb (Q-ICP-MS) detrital zircon ages. In these areas, this metamorphic complex is composed of migmatites, orthogneisses and calcsilicate rocks, with a Late Devonian metamorphic peak age, intruded by Devonian - lower Carboniferous granites. The regional metamorphic peak would also has been accompanied by the development of a pervasive tectonic foliation and associated isoclinal folds. Devonian - Carboniferous granites crosscut the foliation of the migmatites and would have produced a weak contact metamorphism represented by static recrystallization in quartz grains. The regional metamorphic event can be related to the subduction-related Gondwanan orogenic event. At least two more folding phases and related foliations were identified postdating these granitic intrusions, probably related to the collisional event of the Gondwanan orogeny, late Carboniferous - early Permian in age. Evidence of retrograde metamorphism probably related to the previously mentioned foliations and folds are common. Zircons from a mesosome were analyzed by U–Pb Q-ICP-MS yielding a maximum depositional age of 441.79 ± 1.68 Ma (early Silurian/Rhuddanian) indicating a sedimentation for the protholits probably during middle Silurian, age of the pre-orogenic successions of the Gondwanan cycle in Patagonia. Sebastián Dicaro, Santiago N. González, Samanta Serra-Varela, Nemesio Heredia, Structure and metamorphism of the Cushamen Complex in Sañicó and Collón Curá-Limay rivers confluence: A Devonian metamorphic event related to the subduction stage of the Gondwanan Patagonian orogen, Journal of South American Earth Sciences, Volume 121, 2023, 104152, ISSN 0895-9811, https://doi.org/10.1016/j.jsames.2022.104152. 0895-9811 http://rid.unrn.edu.ar/handle/20.500.12049/10377 https://doi.org/10.1016/j.jsames.2022.104152 en https://www.sciencedirect.com/journal/journal-of-south-american-earth-sciences 121 Journal of South American Earth Sciences Elsevier |