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Synchronous intracrystalline δ13C and δ18O differences in natural calcite crystals

Published online by Cambridge University Press:  05 July 2018

J. A. D. Dickson
J. A. D. Dickson*
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
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Abstract

New intersectorial isotope data are presented for two calcites. Mendip calcite shows no detectable δ13C and δ18O differences between synchronous {214} and {014} sectors. Nottingham calcite shows a δ13C difference of 1.0‰ and a δ18O difference of 0.5‰ between synchronous {401} and {0001} sectors. Data now available for 5 different calcites show the magnitude of intersectorial fractionation is variable; the effect on δ13C is twice that on δ18O. All five natural calcites also show erratic isotopic differences between symmetrically-equivalent synchronous sectors. Intersectorial isotopic fractionation is probably widespread but its cause and quantification require further work. Synchronous intracrystalline isotopic differences should be accommodated in the interpretation of isotopic data and should influence future sampling strategy.

Keywords

calciteoxygen isotopescarbon isotopes
Type
Mineralogy
Information
Mineralogical Magazine , Volume 61 , Issue 405 , April 1997 , pp. 243 - 248
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1997

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References

Clark, I.D., Fontes, J.C. and Fritz, P. (1992) Stable isotope disequilibria intravertine from high pH waters: Laboratory investigations and field observations from Oman. Geochim. Cosmochim. Acta, 56, 2041-50.CrossRefGoogle Scholar
Dickson, J.A.D. (1965) A modified staining technique for carbonates in thin section. Nature, 205, 587.CrossRefGoogle Scholar
Dickson, J.A.D. (1991) Disequilibrium carbon and oxygen isotope variations in natural calcite. Nature, 353, 842-4.CrossRefGoogle Scholar
Dickson, J.A.D. (1995) Isotopic homogeneity among nonequivalent sectors of calcite: comment. Geology, 24, 95.2.3.CO;2>CrossRefGoogle Scholar
Gruzensky, P.M. (1967) Growth of calcite crystals. In Crystal growth (Peiser, H.S., ed.). Pergamon, 367-87.Google Scholar
Hendry, J.P. and Marshall, J.D. (1991) Interpretation of complex non-concentric zoning fabrics in sparry calcite cements: Middle Jurassic limestones, central England. Sedimentary Geology, 75, 39—55.CrossRefGoogle Scholar
Klein, R.T. and Lohmann, K.C. (1995) Isotopic homogeneity among nonequivalent sector of calcite. Geology, 23, 633—6.2.3.CO;2>CrossRefGoogle Scholar
Klemm, A., Banerjee, A. and Hoernes, S. (1990) A new intracrystalline isotope effect: δJ8O under the faces of amethyst. Zeitschrift fiir Naturforschung, 45a, 1374-6.CrossRefGoogle Scholar
Klemm, A., Banerjee, A. and Hoernes, S. (1991) Fractionation of oxygen isotopes at the faces of smoky quartz. Zeitschrift für Naturforschung, 46a, 1133-4.CrossRefGoogle Scholar
Klemm, A., Banerjee, A. and Hoernes, S. (1992) Further study of intersectorial isotopes fractionation in quartz. Zeitschrift für Naturforschung, 47a, 1232—4.CrossRefGoogle Scholar
Onasch, C.M. and Vennemann, T.W. (1995) Disequilibrium partitioning of oxygen isotopes associated with sector zoning in quartz. Geology, 23, 1103-6.2.3.CO;2>CrossRefGoogle Scholar
Paquette, J. and Reeder, R.J. (1990) New types of compositional zoning in calcite: Insights into crystal-growth mechanisms. Geology, 58, 1244—7.2.3.CO;2>CrossRefGoogle Scholar
Paquette, J. and Reeder, R.J. (1995) Relationship between surface structure, growth mechanism, and trace element in corporation in calcite. Geochim. Cosmochim. Acta, 59, 735-49.CrossRefGoogle Scholar
Reeder, R.J. (1991) An overview of zoning in carbonate minerals. In Luminescence Microscopy, Quantitative and qualitative aspects (Barker, C.E. and Kopp, O.C., eds). Society of Economic Paleontologists and Mineralogists: Short Course Notes, 25, 77–82.Google Scholar
Reeder, R.J. and Grams, J.C. (1987) Sector zoning in calcite cement crystals: Implications for trace element distributions in carbonates. Geochim. Cosmochim. Acta, 51, 187-94.CrossRefGoogle Scholar
Reeder, R.J., Lamble, G.M., Lee, J.F. and Staudt, W.J. (1994) Mechanism of SeO4 2- substitution in calcite; an XAFS study. Geochim. Cosmochim. Acta, 58, 5639-46.CrossRefGoogle Scholar
Staudt, W.J., Reeder, R.J. and Schoonen, M.A.A. (1994) Surface structural controls on compositional zoning of SO4 2- and SeO4 2- in synthetic calcite single crystals. Geochim. Cosmochim. Acta, 58, 2087—98.CrossRefGoogle Scholar
Turner, J.V. (1982) Kinetic fractionation of carbon-13 during calcium carbonate precipitation. Geochim. Cosmochim. Acta, 46, 1183-91.CrossRefGoogle Scholar
Weiner, S. and Traub, W. (1984) Macromolecules in mollusc shells and their function in biomineralization. Phil. Trans. Roy. Soc. London B, 304. 425-34.Google Scholar