Artículo

Luppo, T.; López de Luchi, M.G.; Rapalini, A.E.; Martínez Dopico, C.I.; Fanning, C.M. "Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary" (2018) Journal of South American Earth Sciences. 82:346-355
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Abstract:

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

Registro:

Documento: Artículo
Título:Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary
Autor:Luppo, T.; López de Luchi, M.G.; Rapalini, A.E.; Martínez Dopico, C.I.; Fanning, C.M.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGEBA), Departamento de Ciencias Geológicas, Ciudad Universitaria, Pabellón 2, 1428, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Instituto de Geocronología y Geología Isotópica (INGEIS), Ciudad Universitaria, Pabellón INGEIS, 1428, Buenos Aires, Argentina
Research School of Earth Sciences, The Australian National University, Canberra, ACT 201, Australia
Palabras clave:geochronology; magmatism; Permian-Triassic boundary; SHRIMP dating; uranium-lead dating; volcanism; zircon; Argentina; Los Menucos; Patagonia; Rio Negro [Argentina]; Esperanza
Año:2018
Volumen:82
Página de inicio:346
Página de fin:355
DOI: http://dx.doi.org/10.1016/j.jsames.2018.01.003
Título revista:Journal of South American Earth Sciences
Título revista abreviado:J. South Am. Earth Sci.
ISSN:08959811
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v82_n_p346_Luppo

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Citas:

---------- APA ----------
Luppo, T., López de Luchi, M.G., Rapalini, A.E., Martínez Dopico, C.I. & Fanning, C.M. (2018) . Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary. Journal of South American Earth Sciences, 82, 346-355.
http://dx.doi.org/10.1016/j.jsames.2018.01.003
---------- CHICAGO ----------
Luppo, T., López de Luchi, M.G., Rapalini, A.E., Martínez Dopico, C.I., Fanning, C.M. "Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary" . Journal of South American Earth Sciences 82 (2018) : 346-355.
http://dx.doi.org/10.1016/j.jsames.2018.01.003
---------- MLA ----------
Luppo, T., López de Luchi, M.G., Rapalini, A.E., Martínez Dopico, C.I., Fanning, C.M. "Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary" . Journal of South American Earth Sciences, vol. 82, 2018, pp. 346-355.
http://dx.doi.org/10.1016/j.jsames.2018.01.003
---------- VANCOUVER ----------
Luppo, T., López de Luchi, M.G., Rapalini, A.E., Martínez Dopico, C.I., Fanning, C.M. Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary. J. South Am. Earth Sci. 2018;82:346-355.
http://dx.doi.org/10.1016/j.jsames.2018.01.003