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Is it possible to obtain reliable archaeomagnetic results from baked clays with very weak magnetism?
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 10th Congress of the Balkan Geophysical Society, Sep 2019, Volume 2019, p.1 - 5
Abstract
The primary goal of archaeomagnetism is to accumulate information about the behaviour of the local geomagnetic field in the past using well-dated archaeological baked clay materials. Sometimes, however, these materials can possess weak magnetic properties due to an insufficient firing in the antiquity, low amount of ferro-oxides or domination of antiferromagnetic minerals. In such cases, it is not possible applying the complete set of laboratory experiments and requirements, which assure the authenticity of archaeomagnetic data.
A detailed investigation of samples with extremely weak magnetism was performed and the reliability of the obtained data is demonstrated. These results cannot be included in archaeomagnetic database as referent feature because they will not pass all the necessary quality criteria. However, the produced archaeomagnetic determinations can serve as valuable check-up of the calculated secular variation curves (when the structure studied is well archaeologically constrained) or can be used for archaeomagnetic dating.