Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary

The Los Menucos Complex (northern Patagonia) consists of ∼6 km thick succession of acidic and intermediate volcanic and pyroclastic products, which has been traditionally assigned to the Middle/Late Triassic. New U/Pb (SHRIMP) zircon crystallization ages of 257 ± 2 Ma at the base, 252 ± 2 Ma at an i...

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Detalles Bibliográficos
Publicado:	2018
Materias:	geochronology magmatism Permian-Triassic boundary SHRIMP dating uranium-lead dating volcanism zircon Argentina Los Menucos Patagonia Rio Negro [Argentina] Esperanza
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v82_n_p346_Luppo http://hdl.handle.net/20.500.12110/paper_08959811_v82_n_p346_Luppo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08959811_v82_n_p346_Luppo
record_format	dspace
spelling	paper:paper_08959811_v82_n_p346_Luppo2023-06-08T15:49:02Z Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary geochronology magmatism Permian-Triassic boundary SHRIMP dating uranium-lead dating volcanism zircon Argentina Los Menucos Patagonia Rio Negro [Argentina] Esperanza The Los Menucos Complex (northern Patagonia) consists of ∼6 km thick succession of acidic and intermediate volcanic and pyroclastic products, which has been traditionally assigned to the Middle/Late Triassic. New U/Pb (SHRIMP) zircon crystallization ages of 257 ± 2 Ma at the base, 252 ± 2 Ma at an intermediate level and 248 ± 2 Ma near the top of the sequence, indicate that this volcanic event took place in about 10 Ma around the Permian-Triassic boundary. This volcanism can now be considered as the effusive terms of the neighboring and coeval La Esperanza Plutono-Volcanic Complex. This indicates that the climax of activity of a large magmatic province in northern Patagonia was coetaneous with the end-Permian mass extinctions. Likely correlation of La Esperanza- Los Menucos magmatic province with similar volcanic and plutonic rocks across other areas of northern Patagonia suggest a much larger extension than previously envisaged for this event. Its age, large volume and explosive nature suggest that the previously ignored potential role that this volcanism might have played in climatic deterioration around the Permian-Triassic boundary should be investigated. © 2018 Elsevier Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v82_n_p346_Luppo http://hdl.handle.net/20.500.12110/paper_08959811_v82_n_p346_Luppo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	geochronology magmatism Permian-Triassic boundary SHRIMP dating uranium-lead dating volcanism zircon Argentina Los Menucos Patagonia Rio Negro [Argentina] Esperanza
spellingShingle	geochronology magmatism Permian-Triassic boundary SHRIMP dating uranium-lead dating volcanism zircon Argentina Los Menucos Patagonia Rio Negro [Argentina] Esperanza Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
topic_facet	geochronology magmatism Permian-Triassic boundary SHRIMP dating uranium-lead dating volcanism zircon Argentina Los Menucos Patagonia Rio Negro [Argentina] Esperanza
description	The Los Menucos Complex (northern Patagonia) consists of ∼6 km thick succession of acidic and intermediate volcanic and pyroclastic products, which has been traditionally assigned to the Middle/Late Triassic. New U/Pb (SHRIMP) zircon crystallization ages of 257 ± 2 Ma at the base, 252 ± 2 Ma at an intermediate level and 248 ± 2 Ma near the top of the sequence, indicate that this volcanic event took place in about 10 Ma around the Permian-Triassic boundary. This volcanism can now be considered as the effusive terms of the neighboring and coeval La Esperanza Plutono-Volcanic Complex. This indicates that the climax of activity of a large magmatic province in northern Patagonia was coetaneous with the end-Permian mass extinctions. Likely correlation of La Esperanza- Los Menucos magmatic province with similar volcanic and plutonic rocks across other areas of northern Patagonia suggest a much larger extension than previously envisaged for this event. Its age, large volume and explosive nature suggest that the previously ignored potential role that this volcanism might have played in climatic deterioration around the Permian-Triassic boundary should be investigated. © 2018 Elsevier Ltd
title	Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
title_short	Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
title_full	Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
title_fullStr	Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
title_full_unstemmed	Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
title_sort	geochronologic evidence of a large magmatic province in northern patagonia encompassing the permian-triassic boundary
publishDate	2018
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v82_n_p346_Luppo http://hdl.handle.net/20.500.12110/paper_08959811_v82_n_p346_Luppo
_version_	1768542419419136000

Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary

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