PRELIMINARY RADIOCARBON DATING RESULTS OF BONE SAMPLES AT THE LAC-UFF, BRAZIL
| Autor: | Bruna B. Pereira, A.S. Cid, Natacha Ribeiro-Pinto, Karolayne Silva, Dayanne F. Amaral, Luiz Carlos Ruiz Pessenda, Kita Macario, Ingrid Chanca, Fabiana M. Oliveira, Rita Scheel-Ybert, Eduardo Q. Alves |
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| Rok vydání: | 2020 |
| Předmět: |
010506 paleontology
Archeology Large molecular weight Bone preservation 060102 archaeology Geochemistry Human bone 06 humanities and the arts 01 natural sciences law.invention Sedimentary depositional environment law visual_art visual_art.visual_art_medium General Earth and Planetary Sciences 0601 history and archaeology Radiocarbon dating Charcoal Geology 0105 earth and related environmental sciences |
| Zdroj: | Radiocarbon. 63:1103-1114 |
| ISSN: | 1945-5755 0033-8222 |
| DOI: | 10.1017/rdc.2020.125 |
| Popis: | Collagen extraction depends on the state of bone preservation, and the acidity of Brazilian soils often prevents the use of this material for radiocarbon dating. When available, however, bone samples constitute very important chronological records for both archaeological sites and natural depositional sites of specific animals. The extraction of collagen was performed using two filters, the first aiming to remove insoluble contaminants, and the second, a vivaspin ultrafilter 30KD to retain large molecular weight materials. The collagen was liofilized and converted to CO2 by combustion in sealed quartz tubes with CuO and Ag. The graphite was produced by zinc reduction in independently sealed Pyrex™ tubes. In order to verify the accuracy of this protocol, we analyzed a modern bone and four previously dated fragments, including those from the Sixth International Radiocarbon Intercomparison (SIRI), and a fragment of human bone from the Amourins site, a Brazilian shellmound. The results for the known age material are in agreement with the expected and the studied sector of Amourins shellmound was dated 4100–3900 years cal BP from a chronological model performed with charcoal dating found in different stratigraphic layers. Samples were dated at the radiocarbon laboratory of Universidade Federal Fluminense (LAC-UFF) in Brazil. |
| Databáze: | OpenAIRE |
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