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  Methodological issues in the 14C dating of rock paintings

Hedges, R. E. M., Ramsey, C. B., Van Klinken, G. J., Pettitt, P. B., Nielsen-Marsh, C., Etchegoyen, A., et al. (1998). Methodological issues in the 14C dating of rock paintings. Radiocarbon, 40(1), 35-44.

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 Urheber:
Hedges, R. E. M., Autor
Ramsey, C. B., Autor
Van Klinken, G. J.1, Autor           
Pettitt, P. B., Autor
Nielsen-Marsh, C., Autor
Etchegoyen, A., Autor
Niello, J. O. F., Autor
Boschin, M. T., Autor
Llamazares, A. M., Autor
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1External Organizations, ou_persistent22              

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Schlagwörter: Organic-carbon Human blood Art Oxidation Earth sciences
 Zusammenfassung: Chemical and isotopic analyses have been made of pigment samples from two separate rock art sites in Argentina. The purpose of the study has been to establish the feasibility of extracting carbonaceous material from the samples which will permit reliable radiocarbon dates for the time of painting. The two sites, Catamarca and Rio Negro, present quite different problems. Most of the paper is concerned with Catamarca, and here we have shown that the paint pigments contain very little or no organic binder; but they do contain calcium oxalate derived from local cacti, and calcium carbonate derived probably from local plant ash. We describe a method to purify carbon extracted from the calcium oxalate, and present the dates obtained on both components. We show that, though rare, natural deposits containing both calcium oxalate and calcite do occur, but that they are very distinct in both C-13 and C-14 compositions; and we argue that they are very unlikely to contaminate the pigments to such an extent that the C-14 dates are altered. For the Rio Negro site we show that the ground for the paint pigments contains carbon derived from fires burnt inside the cave, and discuss how analytical methods provide information to develop a strategy for extracting material, from both ground and pigment, for more reliable dating. [References: 19]

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 Datum: 1998
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Titel: Radiocarbon
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: New Haven : American journal of science
Seiten: - Band / Heft: 40 (1) Artikelnummer: - Start- / Endseite: 35 - 44 Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/991042724398366
ISSN: 0033-8222