New constraints on geomagnetic field intensity variations in the Balkans during the Early Byzantine period from ceramics unearthed at Thasos and Delphi, Greece - Sorbonne Université Access content directly
Journal Articles Journal of Archaeological Science: Reports Year : 2018

New constraints on geomagnetic field intensity variations in the Balkans during the Early Byzantine period from ceramics unearthed at Thasos and Delphi, Greece

Abstract

We report on five new archeomagnetic field intensity data obtained in Greece from groups of pottery fragments precisely dated to between the middle of the fourth century and the beginning of the seventh century CE. These potsherds were unearthed on the islands of Thasos (Northern Greece) and Delphi (Central Greece). Their dating is primarily ensured by typo-morphological arguments, combined with archeological and historical constraints. Archeointensity measurements were performed using the Triaxe protocol, which involves continuous magnetization measurements at high temperatures and which allows us to overcome the thermoremanent magnetization anisotropy and cooling rate effects. Magnetic mineralogy measurements such as low-field magnetic susceptibility versus temperature and thermal demagnetization of three orthogonal IRM components have identified magnetite with possible impurities as the main carrier of the magnetization. The new data range from 52.0μT to 61.5μT after reduction to Thessaloniki and show an increase in geomagnetic field intensity in Greece during the Early Byzantine period. They appear in good agreement with previous intensity results satisfying a set of quality criteria and obtained in a region of 700 km around Thessaloniki, therefore incorporating data from Bulgaria, Greece and South Italy. This study is part of an ongoing effort to better constrain the evolution in geomagnetic field intensity in the Balkans over the past few millennia, with potential use for dating in archeology. The rapid intensity variations documented here during the Early Byzantine period are clearly of interest in this respect.
Fichier principal
Vignette du fichier
Genevey_New_constraints_on.pdf (2.46 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-01479122 , version 1 (28-02-2017)

Identifiers

Cite

Agnès Genevey, Despoina Kondopoulou, Platon Pétridis, Eva Aidona, Arthur Muller, et al.. New constraints on geomagnetic field intensity variations in the Balkans during the Early Byzantine period from ceramics unearthed at Thasos and Delphi, Greece. Journal of Archaeological Science: Reports, 2018, 21, pp.952-961. ⟨10.1016/j.jasrep.2017.01.014⟩. ⟨hal-01479122⟩
418 View
251 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More