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Some Effects of Partial Recrystallisation on 14C dating Late Pleistocene Corals and Molluscs

Published online by Cambridge University Press:  20 January 2017

John Chappell  and
Henry A. Polach
John Chappell
Affiliation:
Department of Geography, S.G.S., Australian National University, Canberra, Australia
Henry A. Polach
Affiliation:
Department of Geophysics & Geochemistry, R.S. Physical Science, Australian National University, Canberra, Australia
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Abstract

The issue of sea level during the last interstadial revolves largely around the problem of achieving reliable 14C dates for shell carbonate from Late Pleistocene shallow marine and littoral deposits. A set of 27 samples were collected from Late Pleistocene reefs in New Guinea, and measurements made of 13C, 14C, plus the degree of recrystallisation (determined by X-ray diffraction). The original fibrous aragonite structure of the samples (corals and clams) is seen in thin section to recrystallise in two quite different modes. The carbon isotope results strongly suggest that one mode, the sparry calcite recrystallisation, represents an open geochemical system which allows contamination by more recent 14C, while the subtle coarsening mode of recrystallisation represents a closed system, often yielding reliable results. The reliability of the latter can be validated if a similarly recrystallised sample, known to be outside the range of 14C dating, shows a background 14C count.

Type
Original Articles
Information
Quaternary Research , Volume 2 , Issue 2 , September 1972 , pp. 244 - 252
Copyright
Academic Press, Inc.

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References

Bloom, A.L. 1971 Glacial-eustatic and isostatic controls of sea level since the last glaciation Turekian, K.K. Late Cenozoic Glacial Ages Yale University Press New Haven, CT 355–379 Google Scholar
Craig, H. 1954 Carbon 13 in plants and the relationship between carbon 13 and carbon 14 variations in nature Journal of Geology 62 115–149 CrossRefGoogle Scholar
Curray, J.R. 1961 Late quaternary sea level: a discussion Geological Society of America Bulletin 72 1707–1712 CrossRefGoogle Scholar
Curray, J.R. 1965 Late quaternary history, continental shelves of the United States Wright, H.E. Frey, D.G. The Quaternary of the United States Princeton University Press Princeton, NJ 723–735 Google Scholar
Fauré, H. Elouard, P. 1967 Schema des variation du niveau de l'ocean Atlantique sur la cote de l'ouest de l'Afrique depuis 40,000 ans Comptes Rendus Academie des Sciences 265D 784–787 Google Scholar
Flint, R.F. 1971 Glacial and Quaternary Geology Wiley New York Google Scholar
Garrels, R.M. Christ, C.L. 1965 Solutions, Minerals and Equilibria Harper and Row NY Google Scholar
Hendy, V.H. 1970 The use of carbon-14 in the study of cave processes Olsson, I.U. Proceedings 12th Nobel Symposium on C-14 Variations in Nature Almquist and Wiksell Stockholm 419–443 Google Scholar
James, N. 1971 Unpublished Ph.D. thesis Department of Geology, McGill University Montreal Google Scholar
Milliman, J.D. Emery, K.O. 1968 Sea levels during the past 35,000 years Science 162 1121–1123 CrossRefGoogle ScholarPubMed
Mörner, N.A. 1971 The position of the ocean level during the interstadial at about 30,000 B.P.—a discussion from a climatic-glaciologic point of view Canadian Journal of Earth Sciences 2 132–142 CrossRefGoogle Scholar
Olsson, I.U. Blake, W. 1962 Problems of radiocarbon dating of raised beaches, based on experience in Spitsbergen Norsk Geografisk Tidsskrift 13 47–64 Google Scholar
Polach, H. 1969 Optimisation of liquid scintillation radiocarbon age determinations and reporting of ages Atomic Energy in Australia 12 21–28 Google Scholar
Polach, H.A. Stipp, J.J. Golson, J. Lovering, J.F. 1969 ANU radiocarbon date list I Radiocarbon 2 15–27 Google Scholar
Polach, H.A. Chappell, J.M.A. Lovering, J.F. 1969 ANU radiocarbon date list III Radiocarbon 11 245–262 CrossRefGoogle Scholar
Schmalz, R.F. 1967 Kinetics and diagenesis in carbonate sediments Journal of Sedimentary Petrology 37 60–67 Google Scholar
Schnable, J.E. Goodell, H.G. 1968 Pleistocene—Recent stratigraphy, evolution, and development of the Apalachicola coast, Florida Geological Society of America Special Paper 112 CrossRefGoogle Scholar
Shepard, F.P. 1963 Thirty five thousand years of sea level Clements, T. Essays in Marine Geology in Honor of K. O. Emery University of California Press Los Angeles, CA 1–10 Google Scholar
Shepard, F.P. Curray, J.R. 1967 Carbon-14 determination of sea level changes in stable areas Progress in Oceanography 2 283–291 Google Scholar
Shotton, F.W. 1967 The problems and contributions of methods of absolute dating within the Pleistocene period Quarterly Journal Geological Society London 122 357–383 CrossRefGoogle Scholar
Thode, H.G. Shima, M. Rees, C.E. Krishnamutty, K.V. 1965 C-13 isotope effects in systems containing CO2, HCO3 −, CO2−, and metal ions Canadian Journal of Chemistry 43 582–595 CrossRefGoogle Scholar
Thom, B.G. 1972 The dilemma of high interstadial sea levels during the last glaciation Progress in Geography 2in pressGoogle Scholar
Veeh, H.H. Chappell, J.M.A. 1970 Astronomical theory of climatic change—support from New Guinea Science 167 862–865 CrossRefGoogle ScholarPubMed
Vogel, J.C. 1959 Über den Isotopengehalt des Kohlenstoffs in Süsswasser Kalksablagerungen Geochimica et Cosmochimica Acta 16 236–242 CrossRefGoogle Scholar