Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México

The Sierra de Catorce is a N-S-trending mountain range located in the northeastern portion of the Mesa Central physiographic province, Mexico. The Sierra lies at the northern end of the Taxco-San Miguel de Allende fault system, which is interpreted as the surface expression of a major crustal discon...

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Autores: Mascuñano, Eduardo, Levresse, Gilles, Cardellach, Esteve, Tritlla, Jordi, Corona-Esquivel, Rodolfo, Meyzen, Christine
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Revista Mexicana de Ciencias Geológicas
Idioma:español
OAI Identifier:oai:ojs.rmcg.geociencias.unam.mx:article/117
Acceso en línea:http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117
Access Level:acceso abierto
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dc.title.none.fl_str_mv Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
title Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
spellingShingle Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
Mascuñano, Eduardo
title_short Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
title_full Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
title_fullStr Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
title_full_unstemmed Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
title_sort Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, México
dc.creator.none.fl_str_mv Mascuñano, Eduardo
Levresse, Gilles
Cardellach, Esteve
Tritlla, Jordi
Corona-Esquivel, Rodolfo
Meyzen, Christine
author Mascuñano, Eduardo
author_facet Mascuñano, Eduardo
Levresse, Gilles
Cardellach, Esteve
Tritlla, Jordi
Corona-Esquivel, Rodolfo
Meyzen, Christine
author_role author
author2 Levresse, Gilles
Cardellach, Esteve
Tritlla, Jordi
Corona-Esquivel, Rodolfo
Meyzen, Christine
author2_role author
author
author
author
author
description The Sierra de Catorce is a N-S-trending mountain range located in the northeastern portion of the Mesa Central physiographic province, Mexico. The Sierra lies at the northern end of the Taxco-San Miguel de Allende fault system, which is interpreted as the surface expression of a major crustal discontinuity. A Triassic to upper Cretaceous sedimentary succession, deformed during the Laramide orogeny, crops out in the range. From the structural point of view, the Sierra de Catorce is a double plunging anticlinorium bounded in its western side by a post-Laramide N-S-trending and west dipping normal fault. We report geochronologic and geochemical data for several post-tectonic granitoids cropping out in the range. The intrusive bodies are I-type continental arc granitoids with Eocene instrusion ages (ca. 38 to 45 Ma, U-Pb determined by LA-ICPMS on individual zircon crystals). Epithermal argentiferous ore deposits are spatially associated with the granitoids. The geochemical signature of the granitoids indicates that magmas derived from a metasomatized mantle, and were highly contaminated with crustal materials. Despite the inferred position of the subduction zone during the Eocene (over 600 km westward), an influence of the subducted slab is needed to explain the metasomatization of the mantle wedge and the high-Ba content observed in all the Sierra de Catorce granitoids. Geochemical features of the granitic rocks are consistent with the regional and local geological framework that allowed rapid emplacement of magma pulses in a post-orogenic extensional geodynamic setting. Key words: post-orogenic magmatism, petrogenesis, U-Pb dating, granitoids, Eocene, Sierra de Catorce, Mexico.
publishDate 2014
dc.date.none.fl_str_mv 2014-01-13
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dc.identifier.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117
url http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117/108
http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117/571
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dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Ciencias Geológicas; Vol 30 No 2 (2013)
Revista Mexicana de Ciencias Geológicas; Vol 30 No 2 (2013)
2007-2902
1026-8774
reponame:Revista Mexicana de Ciencias Geológicas
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spelling Post-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, MéxicoPost-Laramide, Eocene magmatic activity in Sierra de Catorce, San Luis Potosí, MéxicoMascuñano, EduardoLevresse, GillesCardellach, EsteveTritlla, JordiCorona-Esquivel, RodolfoMeyzen, ChristineThe Sierra de Catorce is a N-S-trending mountain range located in the northeastern portion of the Mesa Central physiographic province, Mexico. The Sierra lies at the northern end of the Taxco-San Miguel de Allende fault system, which is interpreted as the surface expression of a major crustal discontinuity. A Triassic to upper Cretaceous sedimentary succession, deformed during the Laramide orogeny, crops out in the range. From the structural point of view, the Sierra de Catorce is a double plunging anticlinorium bounded in its western side by a post-Laramide N-S-trending and west dipping normal fault. We report geochronologic and geochemical data for several post-tectonic granitoids cropping out in the range. The intrusive bodies are I-type continental arc granitoids with Eocene instrusion ages (ca. 38 to 45 Ma, U-Pb determined by LA-ICPMS on individual zircon crystals). Epithermal argentiferous ore deposits are spatially associated with the granitoids. The geochemical signature of the granitoids indicates that magmas derived from a metasomatized mantle, and were highly contaminated with crustal materials. Despite the inferred position of the subduction zone during the Eocene (over 600 km westward), an influence of the subducted slab is needed to explain the metasomatization of the mantle wedge and the high-Ba content observed in all the Sierra de Catorce granitoids. Geochemical features of the granitic rocks are consistent with the regional and local geological framework that allowed rapid emplacement of magma pulses in a post-orogenic extensional geodynamic setting. Key words: post-orogenic magmatism, petrogenesis, U-Pb dating, granitoids, Eocene, Sierra de Catorce, Mexico.La Sierra de Catorce se ubica en el límite nororiental de la provincia fisiográfica de la Mesa Central. La sierra está constituida principalmente por formaciones sedimentarias de edad mesozoica, las cuales están plegadas formando un doble anticlinal orientado N-S y recumbente hacia el E, formado durante la deformación laramídica. El límite occidental es una falla normal que forma parte del sistema Taxco - San Miguel de Allende, el cual se considera la expresión superficial de una discontinuidad de la corteza continental de México. Varias intrusiones magmáticas se emplazaron durante eventos extensivos posorogénicos. Los cuerpos intrusivos están relacionados espacialmente con depósitos argentíferos epitermales encajados en calizas mesozoicas. Las edades isotópicas de los intrusivos graníticos varían entre 38 y 45 Ma (U-Pb en circones, LA-ICPMS). La firma geoquímica de estos granitoides es de arco continental de tipo I, formados a partir de un magma derivado del manto metasomatizado, altamente contaminado por materiales corticales. A pesar de la posición de la zona de subducción durante el Eoceno (más de 600 km hacia el W), es preciso recurrir a una subducción plana de más de 600 km para explicar tanto la metasomatización del manto como el alto contenido de Ba observado en todas las muestras. Las características geoquímicas de los granitoides son coherentes con la geología regional y local, la cual controló el emplazamiento rápido de pulsos de magmas relacionados con el ambiente geodinámico extensional poscolisión.Universidad Nacional Autónoma de México2014-01-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/vnd.ms-excelhttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117Revista Mexicana de Ciencias Geológicas; Vol 30 No 2 (2013)Revista Mexicana de Ciencias Geológicas; Vol 30 No 2 (2013)2007-29021026-8774reponame:Revista Mexicana de Ciencias Geológicasinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMspahttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117/108http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/117/571info:eu-repo/semantics/openAccessoai:ojs.rmcg.geociencias.unam.mx:article/1172024-08-16T19:51:41Z
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