Further progress in the study of epsilon iron oxide in archaeological baked clays
Journal article
Lopez-Sanchez, J, Palencia-Ortas, A, Del Campo, A, McIntosh, G., Kovacheva, M, Martin-Hernandez, F, Carmona, N, Rodriguez de la Fuente, O, Marin, P, Molina-Cardin, A and Osete, ML 2020. Further progress in the study of epsilon iron oxide in archaeological baked clays. Physics of the Earth and Planetary Interiors. 307, p. 106554. https://doi.org//10.1016/j.pepi.2020.106554
Authors | Lopez-Sanchez, J, Palencia-Ortas, A, Del Campo, A, McIntosh, G., Kovacheva, M, Martin-Hernandez, F, Carmona, N, Rodriguez de la Fuente, O, Marin, P, Molina-Cardin, A and Osete, ML |
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Abstract | The occurrence of ε-Fe2O3 in archaeological samples that have been subjected to high temperatures is gradually being detected by the use of micrometric structural characterization techniques. This work provides new information by revealing that the ε-Fe2O3 is formed as a response to temperature, the aggregation state and the position within the baked clay with respect to the nearest heat source. In addition, depending mainly on the atmospheric environment, the temperature reached by the combustion structure, the distance from the heating source and the particle aggregation, other iron oxide magnetic phases are produced. In the baked clay studied here, hematite is found over the whole range of samples studied but its magnetic contribution is negligible. Magnetite is observed at the sample surface, probably due to local atmospheric environment closest to the combustion source. Maghemite is found at all depths up to 6 cm below the sample surface. ε-Fe2O3 has a limited distribution, found within 2–3 cm of the sample surface. Furthermore, the viability of this compound as a palaeofield marker has been evaluated in both archaeological and synthetic samples. The results indicate that ε-Fe2O3 is able to register the direction of the magnetic field. Linear palaeointensity plots have been obtained in synthetic samples, although the value of the palaeofield could be, sometimes, overestimated. |
Keywords | Epsilon iron oxide ; Baked clay; Archeology |
Year | 2020 |
Journal | Physics of the Earth and Planetary Interiors |
Journal citation | 307, p. 106554 |
Publisher | Elsevier |
ISSN | 0031-9201 |
Digital Object Identifier (DOI) | https://doi.org//10.1016/j.pepi.2020.106554 |
Official URL | https://www.sciencedirect.com/science/article/pii/S0031920120301291 |
Publication dates | |
18 Jul 2020 | |
Publication process dates | |
Accepted | 13 Jul 2020 |
Deposited | 16 Aug 2021 |
Publisher's version | License File Access Level Open |
Output status | Published |
https://repository.canterbury.ac.uk/item/8y661/further-progress-in-the-study-of-epsilon-iron-oxide-in-archaeological-baked-clays
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Publisher's version
Lopez-Sanchez et al 2020 Further progress_PEPI_2020.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
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