The Castel di Guido site was discovered in 1970. It was an open site which is located in Italy about 20 km North-West of Roma. Homo heidelbergensis (Anteneandertal) remains were excavated and associated with Acheulian artefacts such as bone bifaces and a great number of faunal remains. This site was first dated by using U-Th dating method on bones and teeth of large mammals. Data obtained from Bos primigenius teeth are presented in this work. The uranium contents of enamel samples are very high. The ages obtained are very different, and depend strongly on the EU (early uptake) and LU (linear uptake) uranium diffusion models, lying respectively within isotopic stage 7 and isotopic stages 10-11. The p uranium diffusion parameter of each tooth can be determined by the combination of the two dating methods (US-ESR, Uranium series - Electron spin resonance). These parameters indicate that the uranium diffusion lies between the EU and LU models. In the upper unit (5), a tooth was dated to 327 ka using the US-ESR method (MIS 9). In the lower unit (4), the US-ESR ages of three teeth range from 260 to 298 ka, lying within marine isotopic stages 8 and 9. The dating results obtained by the US-ESR model are an estimate of the minimum age. The US-ESR ages are in agreement with biostratigraphy (Faunal Unit of Torre in Pietra, lower levels), which suggests an open environment during the stage MIS 9.
Datation US-ESR (Uranium-series) de dents d'aurochs du site Paléolithique inférieur de Castel di Guido (Italie)
BOSCHIAN, GIOVANNI;
2008-01-01
Abstract
The Castel di Guido site was discovered in 1970. It was an open site which is located in Italy about 20 km North-West of Roma. Homo heidelbergensis (Anteneandertal) remains were excavated and associated with Acheulian artefacts such as bone bifaces and a great number of faunal remains. This site was first dated by using U-Th dating method on bones and teeth of large mammals. Data obtained from Bos primigenius teeth are presented in this work. The uranium contents of enamel samples are very high. The ages obtained are very different, and depend strongly on the EU (early uptake) and LU (linear uptake) uranium diffusion models, lying respectively within isotopic stage 7 and isotopic stages 10-11. The p uranium diffusion parameter of each tooth can be determined by the combination of the two dating methods (US-ESR, Uranium series - Electron spin resonance). These parameters indicate that the uranium diffusion lies between the EU and LU models. In the upper unit (5), a tooth was dated to 327 ka using the US-ESR method (MIS 9). In the lower unit (4), the US-ESR ages of three teeth range from 260 to 298 ka, lying within marine isotopic stages 8 and 9. The dating results obtained by the US-ESR model are an estimate of the minimum age. The US-ESR ages are in agreement with biostratigraphy (Faunal Unit of Torre in Pietra, lower levels), which suggests an open environment during the stage MIS 9.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
