Université de Fribourg

Reconstructing the geomagnetic field in west africa: first absolute intensity results from Burkina Faso

Kapper, Lisa ; Donadini, Fabio ; Serneels, Vincent ; Tema, Evdokia ; Goguitchaichvili, Avto ; Morales, Juan Julio

In: Scientific Reports, 2017, vol. 7, p. 45225

We present absolute geomagnetic intensities from iron smelting furnaces discovered at the metallurgical site of Korsimoro, Burkina Faso. Up to now, archaeologists recognized four different types of furnaces based on different construction methods, which were related to four subsequent time periods. Additionally, radiocarbon ages obtained from charcoal confine the studied furnaces to ages...

Université de Fribourg

Directional changes of the geomagnetic field in West Africa: Insights from the metallurgical site of Korsimoro

Donadini, Fabio ; Serneels, Vincent ; Kapper, Lisa ; El Kateb, Akram

In: Earth and Planetary Science Letters, 2015, vol. 430, p. 349–355

This work shows the first archeomagnetic directions from Western Africa measured on 32 iron smelting kilns dated between 650 and 1800 AD. The archeological excavation of the vast metallurgical site of Korsimoro established the existence of four distinct iron-smelting techniques. The time-frame of each technique could be clearly determined with radiocarbon dating. Many of the kilns investigated in...

Université de Fribourg

GEOMAGIA50.v3: 2. A new paleomagnetic database for lake and marine sediments

Brown, Maxwell C ; Donadini, Fabio ; Nilsson, Andreas ; Panovska, Sanja ; Frank, Ute ; Korhonen, Kimmo ; Schuberth, Maximilian ; Korte, Monika ; Constable, Catherine G

In: Earth, Planets and Space, 2015, vol. 67, no. 1, p. 70

Background: GEOMAGIA50.v3 for sediments is a comprehensive online database providing access to published paleomagnetic, rock magnetic, and chronological data obtained from lake and marine sediments deposited over the past 50 ka. Its objective is to catalogue data that will improve our understanding of changes in the geomagnetic field, physical environments, and climate.Findings: GEOMAGIA50.v3 for...

Université de Fribourg

GEOMAGIA50.v3: 1. general structure and modifications to the archeological and volcanic database

Brown, Maxwell C ; Donadini, Fabio ; Korte, Monika ; Nilsson, Andreas ; Korhonen, Kimmo ; Lodge, Alexandra ; Lengyel, Stacey N ; Constable, Catherine G

In: Earth, Planets and Space, 2015, vol. 67, no. 1, p. 83

Background: GEOMAGIA50.v3 is a comprehensive online database providing access to published paleomagnetic, rock magnetic, and chronological data from a variety of materials that record Earth’s magnetic field over the past 50 ka.Findings: Since its original release in 2006, the structure and function of the database have been updated and a significant number of data have been added. Notable...