Edad de enfriamiento U/Pb en rútilos del Gneis de Chímparra (Cabo Ortegal, NO De España)
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 C...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/12160 |
| Acceso en línea: | http://hdl.handle.net/10272/12160 |
| Access Level: | acceso abierto |
| Palabra clave: | U/Pb geochronology Rutile HP/HT metarnorphism Iberian Massif |
| Sumario: | 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 |
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