Hostname: page-component-669899f699-qzcqf Total loading time: 0 Render date: 2025-04-27T15:27:59.323Z Has data issue: false hasContentIssue false
  • English
  • Français

Formation of 13C/12C Isotope Ratios in Speleothems: A Semi-Dynamic Model1

Published online by Cambridge University Press:  18 July 2016

Marek Dulinski  and
Kazimierz Rozanski
Marek Dulinski
Affiliation:
Institute of Physics and Nuclear Techniques, Academy of Mining and Metallurgy, Krakow, Poland
Kazimierz Rozanski
Affiliation:
Isotope Hydrology Section, IAEA, Vienna, Austria
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.

A theoretical approach towards predicting the carbon isotope composition of carbonate cave deposits is presented. The proposed model simulates time variations of both the chemical and isotopic composition of the carbonate solution and deposited calcite in the course of CaCO3 precipitation. Two phases of the precipitation process are distinguished and treated separately: initial outgassing of the solution until a certain degree of supersaturation of CO3 2- ions is reached and subsequent precipitation of CaCO3 related to further outgassing. Precipitation rates of CaCO3 predicted by the model agree fairly well with literature data. The model predicts δ13C values of deposited calcite within a range of ca −16 to +3‰ depending on temperature, chemical and isotope parameters of the initial solution and actual degree of the precipitation process.

Type
Articles
Information
Radiocarbon , Volume 32 , Issue 1 , 1990 , pp. 7 - 16
Copyright
Copyright © 1990 The American Journal of Science 

References

Buhmann, B and Dreybrodt, W 1985 The kinetics of calcite dissolution and precipitation in geologically relevant situations of karst areas. Chem Geol 48:189–211.CrossRefGoogle Scholar
Dandurand, JL, Gourt, R, Hoefs, J, Menschel, G, Schott, J and Usdowski, E 1982 Kinetically controlled variations of major components and carbon and oxygen isotopes in a calcite-precipitating spring. Chem Geol 36:299–315.CrossRefGoogle Scholar
Dreybrodt, W 1980 Deposition of calcite from thin films of natural calcareous solutions and the growth of speleothems. Chem Geol 29:89–105.CrossRefGoogle Scholar
Dreybrodt, W 1982 A possible mechanism for growth of calcite speleothems without participation of biogenic carbon dioxide. Earth & Planetary Sci Letters 58:293–299.CrossRefGoogle Scholar
Garrels, RM 1960 Mineral equilibria. New York, Harper & Row:21–42.Google Scholar
Geyh, MA, Franke, HW and Dreybrodt, W 1983 Anormal grosse δ13C-Werte von Hochgebirgssinter, Vergeblicher Versuch einer palaeoklimatischen Bedeutung. Bodmerenalp/SZ :49–61.Google Scholar
Hendy, CH 1971 The isotopic geochemistry of speleothems – I. The calculation of the effects of different modes of formation on the isotopic composition of speleothems and their applicability as palaeoclimatic indicators. Geochim et Cosmochim Acta 35:801–824.Google Scholar
Hoover, TE and Berkshire, DC 1969 Effects of hydration on carbon dioxide exchange across an air-water interface. Jour Geophys Research 74:456–464.Google Scholar
Langmuir, D 1984 Physical and chemical characteristics of carbonate water. In Guide to the hydrology of carbonate rocks. UNESCO Studies and repts in hydrology ser:69–131.Google Scholar
Michaelis, J, Usdowski, E and Menschel, G 1985 Partitioning of 13C and 12C on the degassing of CO2 and the precipitation of calcite — Rayleigh-type fractionation and a kinetic model. Am Jour Sci 285:318–327.Google Scholar
Mook, WG, Bommerson, JC and Staverman, WH 1974 Carbon isotope fractionation between dissolved bicarbonate and gaseous carbon dioxide. Earth & Planetary Sci Letters 22:169–176.CrossRefGoogle Scholar
Salomons, W and Mook, WG 1986 Isotope geochemistry of carbonates in the weathering zone. In Fritz, P and Fontes, J Ch, eds, Handbook of environmental isotope geochemistry 2. The terrestrial environment B. Amsterdam. Elsevier:239–269.Google Scholar
Siegenthaler, U and Münnich, KO 1981 13C/12C fractionation during CO2 transfer from air to sea. In Bolin, B, ed, Carbon cycle modelling. Chichester, John Wiley & Sons:249–257.Google Scholar
Thode, HG, Shima, M, Rees, CE and Krishnamurthy, KV 1965 Carbon-13 isotope effects in systems containing carbon dioxide bicarbonate, carbonate and metal ions. Can Jour Chem 43:582–595.Google Scholar
Usdowski, E, Hoefs, J and Menschel, G 1979 Relationship between C13 and 18O fractionation and changes in major element composition in a recent calcite-depositing spring—a model of chemical variations with inorganic CaCO3 precipitation. Earth & Planetary Sci Letters 42:267–276.CrossRefGoogle Scholar
Vogel, JC, Grootes, PM and Mook, WG 1970 Isotopic fractionation between gaseous and dissolved carbon dioxide Zeitschr Physics 230:225–238.Google Scholar