New archaeomagnetic data recovered from the study of Roman and Visigothic remains from central Spain (3rd-7th centuries) - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Geophysical Journal International Année : 2012

New archaeomagnetic data recovered from the study of Roman and Visigothic remains from central Spain (3rd-7th centuries)

Résumé

New archaeomagnetic results from four heated/combustion structures recovered from two archaeological sites in central Spain are reported. They have been dated by archaeological evidence and in two cases by radiocarbon dating. Rock magnetic experiments indicate low coercivity magnetic phases, such as magnetite and thermally stable maghaemite, as the main carriers of the remanent magnetization. Haematite has been observed in poorly heated baked clays. Archaeomagnetic directions have been obtained from either alternating field or thermal demagnetization experiments performed on 57 specimens coming from 46 independently oriented samples. The four well-defined archaeomagnetic directions obtained are in good agreement with previous archaeomagnetic data and with recent regional and global field models. They define the beginning of easterly declination drift that was initiated around 350-400 AD and culminated around 800-850 AD, and delineate the maximum in inclination that took place around 600-650 AD. In addition, classical Thellier-Thellier experiments including thermal remanent magnetization anisotropy and cooling rate corrections were conducted on 23 specimens. Only 13 specimens, corresponding to well-defined single component behaviour, gave reliable results. New mean archaeointensities have been obtained for two of the four studied structures (VBK1, 64.2 ± 5.0 μT and VBT1, 62.4 ± 2.6 μT). The new data suggest that two relative intensity maxima occurred inWestern Europe around 320 and 630 AD, being of lower magnitude that observed in Eastern Europe.
Fichier principal
Vignette du fichier
catanzariti-2012.pdf (2.2 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-00700817 , version 1 (16-06-2017)

Identifiants

Citer

Gianluca Catanzariti, Miriam Gomez-Paccard, Greg Mcintosh, Francisco J. Pavon-Carrasco, Annick Chauvin, et al.. New archaeomagnetic data recovered from the study of Roman and Visigothic remains from central Spain (3rd-7th centuries). Geophysical Journal International, 2012, 188 (3), pp.979-993. ⟨10.1111/j.1365-246X.2011.05315.x⟩. ⟨insu-00700817⟩
131 Consultations
120 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More