Edad de enfriamiento U/Pb en rutilos del Gneis de Chímparra • (Cabo Ortegal, NO De España).
The Chímparra gneisses are characterized by a HP-HT (B00ºC, 1500 MPa) mylonitic fabric reequilibrated under amphibolite facies (600ºC, 900 MPa). This fabric is formed by Qtz+Plag+Bt+white mica+Grt+Ky. Rutiles are preserved as inc/usions whithin gamet. These rutiles have been dated at 382+/-3 Ma (2°...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Oviedo (UNIOVI) |
| Repositorio: | RUO. Repositorio Institucional de la Universidad de Oviedo |
| Idioma: | español |
| OAI Identifier: | oai:digibuo.uniovi.es:10651/73974 |
| Acceso en línea: | https://hdl.handle.net/10651/73974 |
| Access Level: | acceso abierto |
| Palabra clave: | U/Pb geochronology, rutile, HP/HT metarnorphism, /berian Massif |
| Sumario: | The Chímparra gneisses are characterized by a HP-HT (B00ºC, 1500 MPa) mylonitic fabric reequilibrated under amphibolite facies (600ºC, 900 MPa). This fabric is formed by Qtz+Plag+Bt+white mica+Grt+Ky. Rutiles are preserved as inc/usions whithin gamet. These rutiles have been dated at 382+/-3 Ma (2° 6Pb l 238U age). This cooling age is consistent with a reported age of peak melamorphism in the same unit (392+/-27 Ma, Ordonez-Casado et al., 1995) suggesting a fast cooling rate during the exhumation process responsible far the mylonitic foliation |
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