期刊
RADIOCARBON
卷 53, 期 1, 页码 117-127出版社
UNIV ARIZONA DEPT GEOSCIENCES
DOI: 10.1017/S0033822200034391
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资金
- Kimmel Center for Archaeological Science, Weizmann Institute of Science
- Swiss Society of Friends of the Weizmann Institute
- European Research Council under the European Community [(FP7/2007-2013)/ERC, 229418]
Ash is formed when plant calcium oxalate crystals (CaC2O4) decompose to form calcite (CaCO3). We found that ash does retain the original calcium oxalate radiocarbon concentration, but in addition, there is another minor C-14 source. This is shown by the presence of a consistent small shift in the pMC and delta C-13 levels when comparing cellulose and ash from modern and archaeological woods. Possible mechanisms for C-14 exchange during combustion or due to diagenesis are considered in order to define parameters for identifying better-preserved wood ash samples.
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