Edad de enfriamiento U/Pb en rutilos del Gneis de Chímparra (Cabo Ortegal, NO De España.

  1. F.J. Fernández 1
  2. P. Valverde Vaquero
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Revista:
Geogaceta

ISSN: 0213-683X

Ano de publicación: 1996

Número: 20

Páxinas: 475-478

Tipo: Artigo

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Outras publicacións en: Geogaceta

Resumo

The Chfmparra gneisses are characterized by a HP-HT (800°C, ISOO MPa) mylonitic fabric reequilibrated under amphibolite facies (600°C, 900 MPa). This fabric is formed by Qtz+Plag+Bt+white mica + Grt+Ky. Rutiles are preserved as inclusions whithin garnet. These rutiles have been dated at 382+1-3 Ma C0GPb 123SU age). This cooling age is consistent with a reported age of peak melamorphism in the same unit (392+1-27 Ma, Ordonez-Casado et al., 1995) suggesting a fast cooling rate during the exhumation process responsible for the mylonitic foliation

Fonte de datos: Dialnet