Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia

Fil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina.

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Detalles Bibliográficos
Autores principales: Zaffarana, Claudia Beatriz, Orts, Darío Leandro, Gallastegui, Gloria, Suárez, Rodrigo, Poma, Stella, Pernich, Sebastián, Aramendía, Brenda
Lenguaje:Inglés
Publicado: Elsevier info
Materias:
Ciencias Exactas y Naturales
Slab roll-back
Arc magmatism
Mineral fractionation
Acceso en línea:https://www.sciencedirect.com/science/article/abs/pii/S0895981124002876?via%3Dihub
http://rid.unrn.edu.ar/handle/20.500.12049/13992
https://doi.org/10.1016/j.jsames.2024.105065
Aporte de:
Repositorio Institucional Digital de la Universidad Nacional de Río Negro (UNRN) de Universidad Nacional de Río Negro
id I65-R171-20.500.12049-13992
record_format dspace
institution Universidad Nacional de Río Negro
institution_str I-65
repository_str R-171
collection Repositorio Institucional Digital de la Universidad Nacional de Río Negro (UNRN)
language Inglés
orig_language_str_mv en
topic Ciencias Exactas y Naturales
Slab roll-back
Arc magmatism
Mineral fractionation
Ciencias Exactas y Naturales
spellingShingle Ciencias Exactas y Naturales
Slab roll-back
Arc magmatism
Mineral fractionation
Ciencias Exactas y Naturales
Zaffarana, Claudia Beatriz
Orts, Darío Leandro
Gallastegui, Gloria
Suárez, Rodrigo
Poma, Stella
Pernich, Sebastián
Aramendía, Brenda
Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
topic_facet Ciencias Exactas y Naturales
Slab roll-back
Arc magmatism
Mineral fractionation
Ciencias Exactas y Naturales
description Fil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina.
author Zaffarana, Claudia Beatriz
Orts, Darío Leandro
Gallastegui, Gloria
Suárez, Rodrigo
Poma, Stella
Pernich, Sebastián
Aramendía, Brenda
author_facet Zaffarana, Claudia Beatriz
Orts, Darío Leandro
Gallastegui, Gloria
Suárez, Rodrigo
Poma, Stella
Pernich, Sebastián
Aramendía, Brenda
author_sort Zaffarana, Claudia Beatriz
title Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
title_short Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
title_full Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
title_fullStr Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
title_full_unstemmed Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia
title_sort reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early jurassic magmatic arc in northern patagonia
publisher Elsevier
publishDate info
url https://www.sciencedirect.com/science/article/abs/pii/S0895981124002876?via%3Dihub
http://rid.unrn.edu.ar/handle/20.500.12049/13992
https://doi.org/10.1016/j.jsames.2024.105065
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spelling I65-R171-20.500.12049-139922026-02-09T12:02:50Z application/pdf info:eu-repo/date/embargoEnd/2027-01-01 info:eu-repo/semantics/embargoedAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ 2024-08-03 Fil: Zaffarana, Claudia Beatriz. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina. Fil: Orts, Darío Leandro. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina. Fil: Gallastegui, Gloria. Instituto Geológico y Minero de España (IGME-CSIC). España Fil: Suárez, Rodrigo. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina. Fil: Poma, Stella. Instituto de Geociencias Basicas, Aplicadas y Ambientales de Buenos Aires (IGEBA, CONICET-UBA). Argentina. Fil: Pernich, Sebastián. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina. Fil: Aramendía, Brenda. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, CONICET. Argentina. Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia Zaffarana, Claudia Beatriz Orts, Darío Leandro Gallastegui, Gloria Suárez, Rodrigo Poma, Stella Pernich, Sebastián Aramendía, Brenda Ciencias Exactas y Naturales Slab roll-back Arc magmatism Mineral fractionation Ciencias Exactas y Naturales The Subcordilleran Plutonic Belt, formed in Early Jurassic times, is a short-lived batholith that developed during Gondwana dismembering. In our study, we analyzed both well-known and potential new localities of the belt of plutonic rocks, considering new whole-rock geochemical data as well as data from the literature. Additionally, new geochemical data from five samples and one U-Pb zircon date are presented from the diorites and granodiorites from the Cerro Catedral, at Bariloche (41◦S). The obtained U-Pb age in zircon is Early Jurassic (192 ± 1.5 Ma). The granitoids of the Subcordilleran Plutonic Belt are calc-alkaline, of medium to high potassium. They exhibit similar alkali content than the granitoids of the Middle Jurassic-Cretaceous Patagonian Batholith, and lower alkalis than the volcanic and plutonic rocks of the Jurassic Chon Aike Silicic Large Igneous Province. These findings suggest that the Subcordilleran Plutonic Belt represents, in the region comprised within 39◦ and 45◦ S, an early stage of the Andean arc. Our observations indicate that while some granitoids in potential localities, such as Cerro Catedral, can now belong to the Subcordilleran Plutonic Belt, other sites, like Pilcaniyeu and Pilahue, may be associated with the plutonic facies of the Chon Aike Province. The Subcordilleran Plutonic Belt is an example of arc magmatism that developed during a period of major plate reorganization, along with the subduction of mature sea floor beneath the Gondwana margin, and the latter promoted slab roll-back processes and a subduction with extension tectonic regime. true The Subcordilleran Plutonic Belt, formed in Early Jurassic times, is a short-lived batholith that developed during Gondwana dismembering. In our study, we analyzed both well-known and potential new localities of the belt of plutonic rocks, considering new whole-rock geochemical data as well as data from the literature. Additionally, new geochemical data from five samples and one U-Pb zircon date are presented from the diorites and granodiorites from the Cerro Catedral, at Bariloche (41◦S). The obtained U-Pb age in zircon is Early Jurassic (192 ± 1.5 Ma). The granitoids of the Subcordilleran Plutonic Belt are calc-alkaline, of medium to high potassium. They exhibit similar alkali content than the granitoids of the Middle Jurassic-Cretaceous Patagonian Batholith, and lower alkalis than the volcanic and plutonic rocks of the Jurassic Chon Aike Silicic Large Igneous Province. These findings suggest that the Subcordilleran Plutonic Belt represents, in the region comprised within 39◦ and 45◦ S, an early stage of the Andean arc. Our observations indicate that while some granitoids in potential localities, such as Cerro Catedral, can now belong to the Subcordilleran Plutonic Belt, other sites, like Pilcaniyeu and Pilahue, may be associated with the plutonic facies of the Chon Aike Province. The Subcordilleran Plutonic Belt is an example of arc magmatism that developed during a period of major plate reorganization, along with the subduction of mature sea floor beneath the Gondwana margin, and the latter promoted slab roll-back processes and a subduction with extension tectonic regime. Zaffarana, C. B., Orts, D., Gallastegui, G., Suárez, R., Poma, S., Pernich, S., & Aramendía, B. (2024). Reviewing the geochemistry and petrology of the subcordilleran plutonic belt, early Jurassic magmatic arc in northern Patagonia. Journal of South American Earth Sciences,145, 105065. 1873-0647 https://www.sciencedirect.com/science/article/abs/pii/S0895981124002876?via%3Dihub http://rid.unrn.edu.ar/handle/20.500.12049/13992 https://doi.org/10.1016/j.jsames.2024.105065 en https://www.sciencedirect.com/journal/journal-of-south-american-earth-sciences 145 Journal of South American Earth Sciences Elsevier

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