Hostname: page-component-745bb68f8f-v2bm5 Total loading time: 0 Render date: 2025-01-08T00:22:12.687Z Has data issue: false hasContentIssue false
  • English
  • Français

41Ca Concentrations in Modern Bone and Their Implications for Dating

Published online by Cambridge University Press:  18 July 2016

Roy Middleton ,
David Fink ,
Jeffrey Klein  and
Pankaj Sharma
Roy Middleton
Affiliation:
Department of Physics, University of Pennsylvania Philadelphia, Pennsylvania 19104
David Fink
Affiliation:
Department of Physics, University of Pennsylvania Philadelphia, Pennsylvania 19104
Jeffrey Klein
Affiliation:
Department of Physics, University of Pennsylvania Philadelphia, Pennsylvania 19104
Pankaj Sharma
Affiliation:
Department of Physics, University of Pennsylvania Philadelphia, Pennsylvania 19104
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have made the first measurements without pre-enrichment of 41Ca in terrestrial rock and bone samples using accelerator mass spectrometry. Although the results in tufa deposits from Egypt are in good agreement with the saturation value of 8×10-15 predicted by Raisbeck and Yiou (1979), the average 41Ca:40Ca ratio of 2×10-15 (range: 0.6 to 4.2×10-15) that we measure in modern bone is an order of magnitude lower than that obtained previously by Henning, et al (1987) on a cow bone that was measured using AMS following isotope enrichment. The low value and the variability (more than a factor of seven) of the 41Ca:40Ca ratio in modern bone make the possibility of dating bones using 41Ca unlikely.

Type
I. Sample Preparation and Measurement Techniques
Information
Radiocarbon , Volume 31 , Issue 3: June 20-25, 1988 Dubrovnik, Yugoslavia , 1989 , pp. 305 - 310
Copyright
Copyright © The American Journal of Science 

References

Edwards, R L, Chen, J H and Wasserburg, G J, 1986, 238U-234U-230Th-232Th systematics and the precise measurement of time over the past 500,000 years: Earth Planetary Sci Letters v 81, p 175–192.Google Scholar
Henning, W, Bell, W A, Billquist, P J, Glagola, B G, Kutschera, W, Liu, Z, Lucas, H F, Paul, M, Rehm, K E and Yntema, J L, 1987, Calcium-41 concentration in terrestrial materials: Prospects for dating of Pleistocene samples: Science, v 236, p 725–727.Google Scholar
Lederer, C M and Shirley, V S, 1978, Table of isotopes, 7th ed: New York, John Wiley & Sons p 93.Google Scholar
Mabuchi, H, Takahashi, H, Nakamura, Y, Notsu, K and Hamaguchi, H, 1974, The half-life of 41Ca: Jour Inorganic Nuclear Chem, v 36, p 1687–1688.Google Scholar
Middleton, R, Klein, J, Raisbeck, G M and Yiou, F, 1983, Accelerator mass spectrometry with 26Al: Nuclear Instruments & Methods, v 218, nos. 1–3, p 430–438.Google Scholar
Nishiizumi, K, Lal, D, Klein, J, Middleton, R and Arnold, J R, 1986, Production of 10Be and 26Al by cosmic rays in terrestrial quartz in situ and implications for erosion rates: Nature v 319, no. 6049, p 134–135.Google Scholar
Raisbeck, G M and Yiou, F, 1979, Possible use of 41Ca for radioactive dating: Nature v 277 p 42–44.Google Scholar
Raisbeck, G M, Yiou, F, Peghaire, A, Guillot, J and Uzureau, J, 1981, Instability of KH3 − and potential implications for detection of 41Ca with a tandem electrostatic accelerator, Proc: Symposium on accelerator mass spectrometry, Argonne, p 426–430.Google Scholar
Shapira, D, DeVries, R M, Fulbright, H W, Toke, J and Clover, M R, 1975, The Rochester heavy ion detector: Nuclear Instruments & Methods, v 129, p 123–130.Google Scholar
Steinhof, A, Henning, W, Müller, M, Roeckl, E, Schüll, D, Korschinek, G, Nolte, E and Paul, M, 1987, Acclerator mass spectrometry of 41Ca with a positive-ion source and the UNILAC accelerator: Nuclear Instruments & Methods, v B29, p 59–62.Google Scholar
Yamaguchi, Y, 1963, Possible use of 41Ca in nuclear dating: Progress Theoretical Physics v 30 p 567.CrossRefGoogle Scholar