Geology and emplacement history of the Nuevo Rosario plutonic suite in the southern Peninsular Rangers batholith, Baja California, México

Peña Alonso, Tomás Alejandro y Delgado Argote, Luis Alberto y Weber, Bodo y Velasco Tapia, Fernando y Valencia, Víctor (2012) Geology and emplacement history of the Nuevo Rosario plutonic suite in the southern Peninsular Rangers batholith, Baja California, México. Boletín de la sociedad geológica mexicana, 29 (1). pp. 1-23. ISSN 1405-3322

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Resumen

The Cretaceous Nuevo Rosarito plutonic suite is located in the southern part of the Peninsular Ranges batholith (~28.7 °N). It is hosted by a suite of Jurassic granitoid rocks dated at 151.6 Ma (U-Pb single zircon ages) and by Late Jurassic - Early Cretaceous volcanic and volcaniclastic rocks. Host rocks display solid-state fabrics related to a deformational event that occurred before the emplacement of the Nuevo Rosarito plutonic suite. The composition of the suite ranges from gabbro to granite. The suite is sub-alkaline and it is divided into three mafic and four felsic units. The geochemical composition of the felsic units varies from metaluminous to peraluminous, and shows arc-related geochemical signatures. Structural and geochemical data suggest that the emplacement of the plutonic suite took place in two episodes. The first one is defined by the intrusion of mafic units in which dioritic bodies were emplaced within a gabbroic body along NNE-SSW oriented extensional fractures. The second episode is defined by the intrusion of three felsic units during a NE-side up, syn-emplacement movement that occurred around 108.4 Ma.

Tipo de elemento: Article
Palabras claves no controlados: Geochemistry; Geochronology; Deformation; Emplacement; Peninsular Range batholith, Mexico
Materias: Q Ciencia > QE Geología
Divisiones: Ciencias de la Tierra
Usuario depositante: Lic. Jesús E. Alvarado
Creadores:
CreadorEmailORCID
Peña Alonso, Tomás AlejandroNO ESPECIFICADONO ESPECIFICADO
Delgado Argote, Luis AlbertoNO ESPECIFICADONO ESPECIFICADO
Weber, BodoNO ESPECIFICADONO ESPECIFICADO
Velasco Tapia, Fernandofernando.velascotp@uanl.edu.mxNO ESPECIFICADO
Valencia, VíctorNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 19 Ene 2017 21:42
Última modificación: 19 Ene 2017 21:42
URI: http://eprints.uanl.mx/id/eprint/11857

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