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Export of Ratho 1 charcoal for AMS dating

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Case Type: 

ProposalDescription: 

Export of charcoal from Ratho 1, Limpopo Province, for AMS radiocarbon dating at the Centre for Applied Isotope SAtudies, University of Georgia, USA

Expanded_Motivation: 

Aim/rationale: The Ratho Boulder site was excavated in 2007 by Dr Bronwen van Doornum under SAHRA permit number 80/07/03/008/51 with the intention to add to available data on the hunter-gatherer sequence of the area; to elucidate finer details of contact; to comment on the “role of hunter-gatherer/farmer site proximity in interaction”; and to obtain additional radiocarbon dating to determine whether the use of the site was contemporaneous with the use of the koppie as a rain control site. Due to her untimely death, Dr Van Doornum was unable to complete the research. Dr Schoeman and myself are now bringing the project to completion. As part of this, we need to undertake the necessary radiocarbon dating. Methodology (short): Relatively small quantities of charcoal were recovered from this excavation, and most of this scattered through deposits. Sample for dating was selected based on context, drawn from context sheets and site plans. Only one hearth feature was found in the excavation. We have chosen to date this as the most reliable context available. Once a permit is issued, the charcoal sample will be couriered to the Centre for Applied Isotope Studies, University of Georgia, for AMS radiocarbon dating. They will use their standard preparation protocols (see https://cais.uga.edu/service/radiocarbon-dating-by-ams/ for details) in processing the sample. The technique is destructive, and it is not expected that any material will be returned. The radiocarbon determination, once available, will be calibrated with OxCal software (Bronk Ramsey 2009) and the SHCal13 calibration curve (Hogg et al. 2013). Confirmation/permit by museum (Attached?): See attached Damage/destructive analysis? (if yes, explain in detail) This application is to export charcoal for AMS radiocarbon dating. The technique is destructive, and it is not expected that any material will be returned. Statement why this study cannot be done in South Africa: Itemba LABS is the only AMS facility in South Africa. It is not yet producing reliable dates. It is therefore necessary to undertake the analysis outside the country. References Bronk Ramsey, C. 2009. Bayesian analysis of radiocarbon dates. Radiocarbon 51: 337–60. Hogg, A.G., H. Quan, P.G. Blackwell, N. Mu, C.E. Buck, T.P. Guilderson, T.J. Heaton, J.G. Palmer, P.J. Reimer, R.W. Reimer, C.S.M. Turney & S.R.H. Zimmerman. 2013. SHCal13 southern hemisphere calibration curve, 0–50,000 years cal BP. Radiocarbon 55: 1889–903.

ApplicationDate: 

Thursday, August 8, 2019 - 16:04

CaseID: 

14179

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