First shrimp-ages on pyroxenites, eclogites and granites of the Ronda complex and its country-rocks
U-Pb shrimp dating of magmatic and metamorphic domains of zircons from various rocks of the Ronda Peridotites (Betic Cordilleras, SE Spain) and their country rocks gave the following results: An extensional stage at ca 780 Ma is reported by the crystallization of a HP-garnet pyroxenite and the LP- p...
| 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: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/12177 |
| Acceso en línea: | http://hdl.handle.net/10272/12177 |
| Access Level: | acceso abierto |
| Palabra clave: | Ronda peridotite Shirimp-dating Zircon |
| Sumario: | U-Pb shrimp dating of magmatic and metamorphic domains of zircons from various rocks of the Ronda Peridotites (Betic Cordilleras, SE Spain) and their country rocks gave the following results: An extensional stage at ca 780 Ma is reported by the crystallization of a HP-garnet pyroxenite and the LP- protolith of a country-rock eclogite. Miocene subduction (20.1+2.0 Ma) caused the formation of the country-rock eclogites. Very fast uplift and emplacement of the ultramafic rocks into middle crustal level producéd contact anatectic granites at 22.9+3.4 Ma implying very fast uplift rates (>2 cm/y) |
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