Testing the reliability of detrital cave sediments as recorders of paleomagnetic secular variations, Seso Cave System (Central Pyrenees, Spain)

Auteur(s) et Affiliation(s)



Description :
A paleomagnetic study has been carried out on a waterlaid detrital sedimentary sequence within the Seso Cave System (West-Central Pyrenees). The detrital sedimentary sequence is made of autochthonous (piping detached material from the Eocene marls host rock inside of the cavity) and allochthonous (stream transported sediments from the outside) sediments. The declination and inclination of the paleomagnetic characteristic component of each depth point is compared to the Spanish archeomagnetic catalog and available geomagnetic models in order to determine the accuracy of these sediments recording the Earth's magnetic field. Results suggest that these sediments poorly record the Earth's magnetic field, however, paleomagnetic inclination shows similar results between both demagnetizing methods and the inclination is well recorded especially in the younger stream facies. Therefore, the inclination data from the Seso Cave deposit is the first record of the Iberian paleomagnetic secular variation during most part of the Medieval time, and they are closer to the inclination values of one geomagnetic model (CALS10k.1b).


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, n°. 119, p. 36-51, nombre de pages : 16, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena