El granitoide de Manzaneda, marcador del acortamiento NE-SW en el arco hercínico
The Manzaneda granite (NW Spain) is located at the southern sector of the Calida Variscan arc. It shows a NW-SE elongated shape, and covers ah area of about 400 Km2, within thè «P/ló de Sapo» anticlinorium. It is a two-mica leucogranite, with feldspar phenocrysts (porphyritic fàcies) near the border...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1997 |
| 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:10272/10292 |
| Acceso en línea: | http://hdl.handle.net/10272/10292 |
| Access Level: | acceso abierto |
| Palabra clave: | Intrusion Granitoid Flattening Variscan belt Manzaneda |
| Sumario: | The Manzaneda granite (NW Spain) is located at the southern sector of the Calida Variscan arc. It shows a NW-SE elongated shape, and covers ah area of about 400 Km2, within thè «P/ló de Sapo» anticlinorium. It is a two-mica leucogranite, with feldspar phenocrysts (porphyritic fàcies) near the borders. The magmatic foliation within the massif shows a NW-SE strike, with variable dips, from horizontal to vertical. The northern and southern borders of the massif are occupied by two, granodioritic NW-SE-elongated bodies, with a NW-SE-striking, southward-dipping foliation. At both borders there are conjugate systems of C planes with subhorizontal lineation, whose obtuse bisector is NE-SW. The structures observed in the granitoid bodies and the country rocks .are consistent with a NE-SW flattening, which is consistent with a progressive changing of the shortening direction from E-W to NNE-SSW across the Variscan arc in NW Spain |
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