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Calibration of Radiocarbon Dates for the Late Pleistocene Using U/Th Dates on Stalagmites

Published online by Cambridge University Press:  18 July 2016

John C. Vogel  and
Joel Kronfeld
John C. Vogel
Affiliation:
Council for Scientific and Industrial Research, Box 395, Pretoria, South Africa 0001
Joel Kronfeld
Affiliation:
Department of Geophysics, University of Tel Aviv, Ramat Aviv, Israel
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Abstract

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Twenty paired 14C and U/Th dates covering most of the past 50,000 yr have been obtained on a stalagmite from the Cango Caves in South Africa as well as some additional age-pairs on two stalagmites from Tasmania that partially fill a gap between 7 ka and 17 ka ago. After allowance is made for the initial apparent 14C ages, the age-pairs between 7 ka and 20 ka show satisfactory agreement with the coral data of Bard et al. (1990, 1993). The results for the Cango stalagmite between 25 ka and 50 ka show the 14C dates to be substantially younger than the U/Th dates except at 49 ka and 29 ka, where near correspondence occurs. The discrepancies may be explained by variations in 14C production caused by changes in the magnetic dipole field of the Earth. A tentative calibration curve for this period is offered.

Type
Articles
Information
Radiocarbon , Volume 39 , Issue 1 , 1997 , pp. 27 - 32
Copyright
Copyright © The American Journal of Science 

References

Barbetti, M. 1980 Geomagnetic strength over the last 50,000 years and changes in atmospheric 14C concentration: Emerging trends. In Stuiver, M. and Kra, R., eds., Proceedings of the 10th International 14C Conference. Radiocarbon 22(2): 192–199.Google Scholar
Bard, E., Arnold, M., Fairbanks, R. G. and Hamelin, B. 1993 230Th-234U and 14C ages obtained by mass spectrometry on corals. In Stuiver, M., Long, A. and Kra, R. S., eds., Calibration 1993. Radiocarbon 35(1): 191–199.CrossRefGoogle Scholar
Bard, E., Hamelin, B., Fairbanks, R. G. and Zinder, A. 1990 Calibration of the 14C timescale over the past 30,000 years using mass spectrometric U-Th ages from Barbados corals. Nature 345: 405–410.CrossRefGoogle Scholar
Bischoff, J. L., Ludwig, K., Garcia, J. F., Carbonell, E., Stafford, T. W. Jr. and Jull, A. J. T. 1994 Dating of the basal Aurignacian sandwich at Abric Romani (Catalunya, Spain) by radiocarbon and uranium-series. Journal of Archaeological Science 21: 541–551.Google Scholar
Goede, A. and Vogel, J. C. 1991 Trace element variations and dating of a Late Pleistocene Tasmanian Speleothem. Palaeogeography, Palaeoclimatology, Palaeoecology 88: 121–131.CrossRefGoogle Scholar
Kromer, B. and Becker, B. 1993 German oak and pine 14C calibration, 7200–9439 BC. In Stuiver, M., Long, A. and Kra, R. S., eds., Calibration 1993. Radiocarbon 35(1): 125–135.Google Scholar
Stuiver, M. and Pearson, G. W. 1993 High-precision bidecadal calibration of the radiocarbon time scale, ad 1950–500 bc and 2500–6000 bc. In Stuiver, M., Long, A. and Kra, R. S., eds., Calibration 1993. Radiocarbon 35(1): 1–23.Google Scholar
Tric, E., Valet, J. P., Tucholka, P., Paterne, M., Labeyrie, L., Guichard, F., Tauxe, L. and Fontugne, M. 1992 Paleointensity of the geomagnetic field during the last eighty thousand years. Journal of Geophysical Research 97: 9337–9351.CrossRefGoogle Scholar
Vogel, J. C. 1980 Accuracy of the radiocarbon time scale beyond 15,000 bp. In Stuiver, M. and Kra, R., eds., Proceedings of the 10th International 14C Conference. Radiocarbon 22(2): 210–218.Google Scholar
Vogel, J. C. 1983 14C variations during the Upper Pleistocene. In Stuiver, M. and Kra, R., eds., Proceedings of the 11th International 14C Conference. Radiocarbon 25(2): 213–218.CrossRefGoogle Scholar
Vogel, J. C. 1987 Calibration of radiocarbon dates beyond 10 000 BP. In Aurenche, O., Evin, J., and Hours, F., eds., Chronologies in the Near East . BAR International Series 379(i). Oxford, BAR: 319–322.Google Scholar