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High-temperature archeointensity measurements from Mesopotamia

Abstract : We present new archeointensity results obtained from 127 potsherds and baked brick fragments dated from the last four millennia BC which were collected from different Syrian archeological excavations. High temperature magnetization measurements were carried out using a laboratory-built triaxial vibrating sample magnetometer (Triaxe), and ancient field intensity determinations were derived from the experimental procedure described by Le Goff and Gallet [Le Goff and Gallet. Earth Planet. Sci. Lett. 229 (2004) 31–43]. As some of the studied samples were previously analyzed using the classical Thellier and Thellier [Thellier and Thellier . Ann. Geophys. 15 (1959) 285–376] method revised by Coe [Coe. J. Geophys. Res. 72 (1967) 3247–3262], a comparison of the results is made from the two methods. The differences both at the fragment and site levels are mostly within ± 5%, which strengthens the validity of the experimental procedure developed for the Triaxe. The new data help to better constrain the geomagnetic field intensity variations in Mesopotamia during archeological times, with the probable occurrence of an archeomagnetic jerk around 2800–2600 BC.
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Submitted on : Thursday, May 31, 2007 - 10:27:20 AM
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Y. Gallet, Maxime Le Goff. High-temperature archeointensity measurements from Mesopotamia. Earth and Planetary Science Letters, Elsevier, 2006, 241 (1-2), pp.159-173. ⟨10.1016/j.epsl.2005.09.058⟩. ⟨insu-00150632⟩



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