Coronitic metagabbros from the Sobrado Unit (Órdenes Complex, NW Iberian Massif). II: Thermobarometry and P-T path
Three types of corona textures developed in metagabbros of the Sobrado Unit. Detailed thermobarometry, carried out in groups II and III coronas, together with inferred P-T conditions for group I coronas, show that the corona textures were generated during a drastic and virtually isothermal increase...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2002 |
| 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:10272/9153 |
| Acceso en línea: | http://hdl.handle.net/10272/9153 |
| Access Level: | acceso abierto |
| Palabra clave: | Coronitic metagabbros Corona thermobarometry P-T path Órdenes Complex NW Iberian Massif |
| Sumario: | Three types of corona textures developed in metagabbros of the Sobrado Unit. Detailed thermobarometry, carried out in groups II and III coronas, together with inferred P-T conditions for group I coronas, show that the corona textures were generated during a drastic and virtually isothermal increase in pressure. Highest P-T conditions, registered in group III coronas, reached 660-770 °C and 13-17 kbar. Subduction of a relatively thin slice of arc-related crust below a mantle wedge, either with an intact thermal structure or heated and thermally softened in a relatively inner part of a volcanic arc, is suggested as the probable dynamic setting to explain the P-T path found in the coronitic metagabbros |
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