Cohen-Ofri, I., Weiner, L., Boaretto, E., Mintz, G. and Weiner, S. (2006). Modern and fossil charcoal:. J Archaeol Sci 33 (3). Vol 33(3), pp. 428-439.
| Title: | Modern and fossil charcoal: | ||||
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| Subtitle: | aspects of structure and diagenesis | ||||
| Issue: | J Archaeol Sci 33 (3) | ||||
| Series: | Journal of Archaeological Science | ||||
| Volume: | 33 (3) | ||||
| Page Start/End: | 428 - 439 | ||||
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| Publication Type: | Journal | ||||
| Abstract: | The structures and compositions of modern and fossil charcoal samples were compared in order to evaluate charcoal degradation processes in archaeological sites. Modern charcoal samples produced in campfires contain two major phases: graphite-like microcrystallites and a non-organized phase. These phases create a mosaic-like structure with differing relative proportions depending on the taxonomic source of the wood used. Fossil charcoal samples from Israel also contained the graphite-like microcrystallites and the non-organized phases, but were clearly altered compared to modern charcoal. The graphite-like phase of the fossil charcoal has much higher electrical resistivity, and its ESR properties show that it has markedly altered surface electronic states. Infrared spectra show the presence of additional carboxylate groups. Oxidation has therefore altered the structure. This appears to be a ``self-humification'' process that affects the graphitic component, and probably the non-organized phase as well. | ||||
| Year of Publication: | 2006 | ||||
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| Source: |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
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| Created Date: | 15 May 2006 |
