Geología y geoquímica del granitoide pre-varisco de Puente de Selce (Antiforme del Narcea, Asturias)

  1. G. Gutiérrez-Alonso 1
  2. J. Fernández Suárez 2
  1. 1 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

  2. 2 Memorial University of Newfoundland
    info

    Memorial University of Newfoundland

    San Juan de Terranova, Canadá

    ROR https://ror.org/04haebc03

Revista:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Ano de publicación: 1996

Volume: 9

Número: 3-4

Páxinas: 227-240

Tipo: Artigo

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Outras publicacións en: Revista de la Sociedad Geológica de España

Resumo

The Puente de Selce granitoid intruded the Proterozoic Narcea slates and was deformed heterogeneously during Variscan times. Gneisic, mylonitic and phyllonitic textures surround lenses with less prominent deformation. The age of this rocks is interpreted to be pre-variscan. The Puente de Selce granitoid is formed by 1-type high-K calc-alkaline tonalites and granodiorites which have evolved by fractionation of plagioclase, biotite, amphibole and apatite. Major and trace element contents and variation trends are characteristic of granitoids generated in an Andean-type continental are setting. Melting of amphibolitic rocks of andesitic composition in the lower crust is proposed as the most likely mechanism for the generation of these rocks.

Fonte de datos: Dialnet