REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA

REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA

REE signatures in simples of plutonic rocks from five copper porphyry systems in Sonora, suggest that there is a petrogenetic process linked to the cooling of a major pluton that generates magma columns of phophyry textura, which are emplaced at shallow levels in the crust. This is revealed by an ap...

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Autores principales: Santillana Villa, Cecilia, Valencia-Moreno, Martín, Ochoa-Landín, Lucas, Del Río-Salas, Rafael
Formato: Online
Lenguaje:spa
Publicado: Universida de Sonora 2022
Acceso en línea:https://epistemus.unison.mx/index.php/epistemus/article/view/188
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spelling oai:http:--epistemus.unison.mx:article-1882023-06-14T01:03:57Z REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA Firmas de REE en intrusivos asociados a pórfidos de cobre en Sonora Santillana Villa, Cecilia Valencia-Moreno, Martín Ochoa-Landín, Lucas Del Río-Salas, Rafael copper porphyry REE europium anomaly pórfidos de cobre REE anomalía de europio REE signatures in simples of plutonic rocks from five copper porphyry systems in Sonora, suggest that there is a petrogenetic process linked to the cooling of a major pluton that generates magma columns of phophyry textura, which are emplaced at shallow levels in the crust. This is revealed by an apparent reversal in the polarity of the europium anomaly in the REE normalized patterns. In general, the patterns display a LREE-enriched slope, with a well-developed negative europium anomaly in the case of the main pluton. The signatures of the intrusives associated with mineralization are very similar, excepting the europium anomaly, which becomes less negative and even positive. According to existing models, this can be explained by considering that there is a significant fractionation of hornblende during the generation of the porphyritic stock, perhaps under more reducing magmatic conditions. Las firmas de REE en muestras de rocas plutónicas en cinco sistemas de pórfido de cobre en Sonora, sugieren que existe un proceso petrogenético a partir del enfriamiento de un plutón principal que genera columnas de magma de textura porfídica emplazada en niveles más someros de la corteza. Esto es revelado por una aparente inversión en la polaridad de la anomalía de europio en los patrones normalizados de REE. En general, los patrones muestran una pendiente enriquecida en LREE, con una anomalía negativa de europio bien desarrollada en el caso del plutón principal. Las firmas de los intrusivos asociados con la mineralización son muy similares, a excepción de que la anomalía de europio se hace menos negativa e incluso positiva. De acuerdo con los modelos existentes, esto puede explicarse considerando que hay un fraccionamiento importante de hornblenda durante la generación del stock porfídico, tal vez en condiciones magmáticas más reductoras. Universida de Sonora 2022-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Research Investigación application/pdf application/pdf text/xml https://epistemus.unison.mx/index.php/epistemus/article/view/188 10.36790/epistemus.v15i31.188 EPISTEMUS; Vol. 15 No. 31 (2021): Issue 31; 31-37 EPISTEMUS; Vol. 15 Núm. 31 (2021): Revista No. 31; 31-37 2007-8196 2007-4530 spa https://epistemus.unison.mx/index.php/epistemus/article/view/188/273 https://epistemus.unison.mx/index.php/epistemus/article/view/188/213 https://epistemus.unison.mx/index.php/epistemus/article/view/188/344 Derechos de autor 2022 EPISTEMUS https://creativecommons.org/licenses/by-nc-nd/4.0
institution Epistemus
collection OJS
language spa
format Online
author Santillana Villa, Cecilia
Valencia-Moreno, Martín
Ochoa-Landín, Lucas
Del Río-Salas, Rafael
spellingShingle Santillana Villa, Cecilia
Valencia-Moreno, Martín
Ochoa-Landín, Lucas
Del Río-Salas, Rafael
REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
author_facet Santillana Villa, Cecilia
Valencia-Moreno, Martín
Ochoa-Landín, Lucas
Del Río-Salas, Rafael
author_sort Santillana Villa, Cecilia
title REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
title_short REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
title_full REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
title_fullStr REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
title_full_unstemmed REE SIGNATURES OF INTRUSIVES ASSOCIATED WITH PORPHYRY COPPER OF SONORA
title_sort ree signatures of intrusives associated with porphyry copper of sonora
description REE signatures in simples of plutonic rocks from five copper porphyry systems in Sonora, suggest that there is a petrogenetic process linked to the cooling of a major pluton that generates magma columns of phophyry textura, which are emplaced at shallow levels in the crust. This is revealed by an apparent reversal in the polarity of the europium anomaly in the REE normalized patterns. In general, the patterns display a LREE-enriched slope, with a well-developed negative europium anomaly in the case of the main pluton. The signatures of the intrusives associated with mineralization are very similar, excepting the europium anomaly, which becomes less negative and even positive. According to existing models, this can be explained by considering that there is a significant fractionation of hornblende during the generation of the porphyritic stock, perhaps under more reducing magmatic conditions.
publisher Universida de Sonora
publishDate 2022
url https://epistemus.unison.mx/index.php/epistemus/article/view/188
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