Estudio preliminar de la paleointensidad de rocas volcanicas del Mioceno superior y Plioceno del sudeste de la peninsula Ibérica
- Calvo Rathert, Manuel
- Vegas, Mercedes
ISSN: 0213-683X
Year of publication: 2007
Issue: 43
Pages: 11-14
Type: Article
More publications in: Geogaceta
Abstract
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.
Portal documents are updated daily. This date refers to the updating of information related to the portal structure (people, research groups, organizational units, projects...).