Status of the AMS facility at the University of Georgia

Cherkinsky, Alexander; Culp, Randy; Dvoracek, Doug; Noakes, John E.

doi:10.1016/j.nimb.2009.10.051

Cited by 92 publications

(60 citation statements)

References 5 publications

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“…Ten shells, seven bones and two charred wood samples were run at the Oxford Radiocarbon Accelerator Unit (ORAU) following routine pretreatments and standard dating procedures that included ultrafiltration and Cherkinsky et al (2010) and Vogel et al (1984). 14 C ages were calculated in accordance with the definitions recommended by Stuiver and Polach (1977).…”

Section: Methodsmentioning

confidence: 99%

Marine Radiocarbon Reservoir Effect in Late Pleistocene and Early Holocene Coastal Waters off Northern Iberia

et al. 2016

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Radiocarbon dating of closely associated marine mollusk shells and terrestrial material (mammal bones or charred wood) collected from archaeological contexts in northern Atlantic Iberian coastal areas is used to quantify the marine Results not only provide useful information on environmental conditions but also a framework to obtain more precise and reliable absolute chronologies for the Late Pleistocene and Early Holocene in northern Iberia.

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Section: Methodsmentioning

confidence: 99%

Marine Radiocarbon Reservoir Effect in Late Pleistocene and Early Holocene Coastal Waters off Northern Iberia

et al. 2016

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“…AMS measurement [8] was performed using National Electrostatics Corporation (NEC) model 1.5SDH-1 Pelletron accelerator capable of accelerating the +1 charged ions to about 1 MeV. This AMS system is designed to measure 14 C in modern graphite samples with a precision of 0.3% or better for 1 mg size targets.…”

Section: Methodsmentioning

confidence: 99%

AMS measurement of samples smaller than 300μg at center for applied isotope studies, University of Georgia

Cherkinsky

Prasad

Dvoracek

2013

Nuclear Instruments and Methods in Physics Research Section B:

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“…Graphite 14 C/ 13 C ratios were measured using the compact Pelletron AMS system 1.5SDH-1 with total energy ~1 MeV. (Cherkinsky et al 2010). Sample ratios were compared to the ratio measured from OXI (NIST SRM 4990b).…”

Section: Methodsmentioning

confidence: 99%

14C Dating of Organic Residue and Carbonate from Stromatolites in Etosha Pan, Namibia: The 14C Reservoir Effect, Correction of Published Carbonate Ages, and Evidence of a >8-m-Deep Lake During the Late Pleistocene

Brook¹

2013

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ABSTRACT. Lacustrine stromatolites are layered accretionary structures formed in shallow water by cyanobacteria. They are a precise indicator of high lake limits and their morphology and structure provide an insight into paleoenvironments of the time. Previous research on lacustrine stromatolites from Etosha Pan in Namibia based on radiocarbon ages of carbonates were close to the limit of the method and did not account for any possible 14 C reservoir effect. The ages were used to suggest that the basin was not extensively flooded during the last 40,000 yr. To assess the reservoir effect, the age characteristics of a stromatolite from Poacher's Point were investigated by 14 C dating both carbonate and organic residue from samples at different depths in the deposit. The ~15-cm-diameter stromatolite was separated into 12 zones from the center to the edge and block samples were cut from each zone; the carbonate and residual organic residue were dated separately. The carbonate ages ranged from 34,700 to 24,700 14 C yr BP and the organic ages from 15,700 to 2500 14 C yr BP. Ages generally increased with increasing distance from the surface of the deposit. We believe that the organic ages are an accurate estimate of the stromatolite's age, while the much older carbonate ages reflect incorporation of old carbon from limestone bedrock and ancient calcrete introduced by stream and spring flow. Excluding the 2 oldest organic ages (15,700 and 13,600 14 C yr BP), which may reflect contamination by older organic material washed into the lake during flooding, a linear regression relationship between carbonate and organic ages indicates that the reservoir effect on carbonate ranges up to ~24,000 14 C yr BP but decreases slightly as the true age of the deposit increases. This regression relationship was used to correct 2 finite carbonate ages for stromatolites from Pelican Island obtained in the early 1980s, which together with our new organic age for a stromatolite from Andoni Bay, document a >8-m-deep lake in Etosha Pan during the Late Pleistocene, at and prior to ~34,000-26,000 cal yr BP. The organic carbon ages from the Poacher's Point stromatolite suggest prolonged lacustrine conditions during the early to middle Holocene (8000-6600 cal yr BP) but not to the extent seen during the Late Pleistocene.

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Status of the AMS facility at the University of Georgia

Cited by 92 publications

References 5 publications

Marine Radiocarbon Reservoir Effect in Late Pleistocene and Early Holocene Coastal Waters off Northern Iberia

Marine Radiocarbon Reservoir Effect in Late Pleistocene and Early Holocene Coastal Waters off Northern Iberia

AMS measurement of samples smaller than 300μg at center for applied isotope studies, University of Georgia

14C Dating of Organic Residue and Carbonate from Stromatolites in Etosha Pan, Namibia: The 14C Reservoir Effect, Correction of Published Carbonate Ages, and Evidence of a >8-m-Deep Lake During the Late Pleistocene

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