Monte Carlo determinations of the beta dose rate to tooth enamel

Marsh, R. E.; Prestwich, W.V.; Rink, W.J.; Brennan, B.J.

doi:10.1016/s1350-4487(02)00065-3

Cited by 61 publications

(26 citation statements)

References 8 publications

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“…The analyses of purified U and Th were performed by α-ray spectrometry. ESR/US ages were calculated with the ESR-DATA program (36), using an α efficiency (43) of 0.13 ± 0.02 and Monte Carlo β attenuation factors based on the thickness of the tooth enamel with outer layers removed (44). In addition, water content was estimated to be 3 wt% in the enamel, 10 wt% in the dentin and cement.…”

Section: Methodsmentioning

confidence: 99%

Radiometric dating of the type-site for Homo heidelbergensis at Mauer, Germany

Wagner

Krbetschek

Degering³

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

166

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The Mauer mandible, holotype of Homo heidelbergensis, was found in 1907 in fluvial sands deposited by the Neckar River 10 km southeast of Heidelberg, Germany. The fossil is an important key to understanding early human occupation of Europe north of the Alps. Given the associated mammal fauna and the geological context, the find layer has been placed in the early Middle Pleistocene, but confirmatory chronometric evidence has hitherto been missing. Here we show that two independent techniques, the combined electron spin resonance/U-series method used with mammal teeth and infrared radiofluorescence applied to sand grains, date the type-site of Homo heidelbergensis at Mauer to 609 ± 40 ka. This result demonstrates that the mandible is the oldest hominin fossil reported to date from central and northern Europe and raises questions concerning the phyletic relationship of Homo heidelbergensis to more ancient populations documented from southern Europe and in Africa. We address the paleoanthropological significance of the Mauer jaw in light of this dating evidence.geochronology | paleoanthropology | physical dating | Quaternary

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Section: Methodsmentioning

confidence: 99%

Radiometric dating of the type-site for Homo heidelbergensis at Mauer, Germany

Wagner

Krbetschek

Degering³

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

166

View full text Add to dashboard Cite

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“…Concentrations of potassium, uranium, thorium, and rubidium were quantified by inductively-coupled plasma mass spectrometry (ICP-MS), and were converted into dose rate based on data from Adamiec and Aitken (1998) and Marsh et al (2002). Past changes of moisture content are not predictable, so an error of 5% was applied to measured value to account for them.…”

Section: Optically-stimulated Luminescence (Osl) Datingmentioning

confidence: 99%

Building of shore-oblique transverse dune ridges revealed by ground-penetrating radar and optical dating over the last 500years on Tottori coast, Japan Sea

et al. 2011

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“…Given this, we consider that measurements made of present-day radioactivity are sufficiently representative to derive long-term burial dose rates. Conversions to annual dose rates followed Aitken (1985; alpha and gamma) and Marsh et al (2002;beta), with dose rates attenuated for sediment size and paleomoisture contents as measured when sampled. Cosmic dose rates were determined following Prescott and Hutton (1994).…”

Section: Luminescencementioning

confidence: 78%

A dating intercomparison study on Late Stone Age coastal midden deposits, South Africa

et al. 2008

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The southern and western coastlines of South Africa have an extensive archaeological record with many sites associated with widespread eolian deposits. While much of this rich archaeological record is based on cave sites, evidence of Late Stone Age occupation is additionally preserved in the form of open-site shell middens. We present here a comparative study of the application of amino acid racemization (AAR), optically stimulated luminescence (OSL), and radiocarbon analyses to three Late Stone Age (LSA) midden sites found within dunes on the southern coastline of South Africa. Preliminary geochronological analyses suggest that middens offer opportunity to fill in gaps in what is still a fragmentary archaeological record. Results show OSL and radiocarbon ages in good agreement, illustrating the potential to date not only the middens but also the surrounding dunes that constituted the dwelling sites. AAR results show increasing ratios with age and also that the application of paired shell and "whole rock" AAR can provide insights into the degree of biogenic sediment recycling at buried midden sites. However, the work also highlights that caution is required when OSL sampling sediment associated with middens which may have undergone human disturbance and that further work is required to improve the regional marine reservoir correction for radiocarbon dating in this part of South Africa. The study also illustrates that AAR will only provide useful data provided that middens have been sufficiently deeply buried to overcome fluctuations in environmental variables that affect the racemization rate and that inter-genus comparisons should be avoided. © 2008 Wiley Periodicals, Inc. INTRODUCTIONThe South African coastline exhibits an extensive suite of Holocene coastal dunes, the most recent manifestation of multiple generations of eolianites ranging in age back to the Neogene (Illenberger, 1996;Roberts & Brink, 2002;Bateman et al., 2004). Geoarchaeology: An International Journal, Vol. 23, No. 6, 715-741 (2008 Coastal dunefields of the southern coast are commonly found within logspiral bays on the down-drift aspect of river mouths. Some localities such as Sedgefield exhibit multiple accretionary dune complexes that in places exceed 30 m in height (e.g., Tinley, 1985;Illenberger, 1996;Roberts & Brink, 2002;Bateman et al., 2004). Renowned archaeological cave sites, including Die Kelders, Blombos, Pinnacle Point, and the Klasies River mouth are also found along this coastline and contain evidence for the emergence of early anatomically and cognitively modern humans during the Middle Stone Age (MSA; ca. 250-12 ka; e.g., Henshilwood et al., 2002Henshilwood et al., , 2004Marean et al., 2007). Deposits within the caves are frequently of eolian origin and may contain or have influenced the preservation of archaeological material (Henshilwood et al., 2004;Marean et al., 2007). These sites record the human occupation and subsistence in the coastal zone as far back as marine isotope stage 6 or ca. 160 ka (Marean et al., 2007). Evide...

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Monte Carlo determinations of the beta dose rate to tooth enamel

Cited by 61 publications

References 8 publications

Radiometric dating of the type-site for Homo heidelbergensis at Mauer, Germany

Radiometric dating of the type-site for Homo heidelbergensis at Mauer, Germany

Building of shore-oblique transverse dune ridges revealed by ground-penetrating radar and optical dating over the last 500years on Tottori coast, Japan Sea

A dating intercomparison study on Late Stone Age coastal midden deposits, South Africa

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