Estudio preliminar de la paleointensidad de rocas volcánicas del Mioceno superior y Plioceno del sudeste de la Península Ibérica
A paleointensity study has been carried out on samples from 13 volcanic sites belonging to four different types of volcanism of late Miocene to Pliocene age from south-eastern Spain. Rock-magnetic experiments including measurement of thermomagnetic curves and hysteresis parameters as well as ore mic...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 2007 |
| País: | España |
| Recursos: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/8356 |
| Acesso em linha: | http://hdl.handle.net/10272/8356 |
| Access Level: | acceso abierto |
| Palavra-chave: | Paleointensity Rock magnetism Volcanic rocks Neogene |
| Resumo: | A paleointensity study has been carried out on samples from 13 volcanic sites belonging to four different types of volcanism of late Miocene to Pliocene age from south-eastern Spain. Rock-magnetic experiments including measurement of thermomagnetic curves and hysteresis parameters as well as ore microscopy showed that the main carriers of remanence were low-Ti titanomagnetite and titanohematite. A PSD domain structure was observed in most samples. 43 of 90 samples from only 7 sites provided successful paleointensity determinations. 4 sites yield very low paleointensity values, but only in sites M4 and G15 anomalous paleomagnetic directions confirm an intermediate polarity. Lamproitic and calc-alkaline volcanics proved to be more suitable for paleointensity determinations in this area |
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