Abstract
In the near future, atmospheric carbon dioxide from the combustion of fossil fuels may cause the surface layers of the ocean to become generally under saturated with calcium carbonate. The hypothetic sedimentary effects of such an event are here discussed in the light of studies in the Skagerrak Bay, North Sea. In this area, near shore sediments in the depth range 0–40 m are affected by present-day carbonate dissolution. Not surprisingly, evidence of inorganic carbonate precipitation is absent. Stages in the dissolution process are microscopic etch patterns on calcareous grains, partially dissolved grains, and finally structural breakdown and complete dissolution of skeletal elements. Mineral phases affected are calcite, aragonite, and a spectrum of magnesian calcites. Dissolution is quantitatively unimportant in living calcareous organisms, but preservation of shells and skeletons as fossils is much impeded. A future change towards similar conditions in all the world's shelf seas would certainly mean an end to the typical warm-sea carbonate sedimentation as it is known today on the Bahama Banks and in other supersaturated regions.
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References
Broecker, W. S., Li, Y-H., and Peng, T-H., Impingement of Man on the Oceans (edit. by Hood, D.W.), ch. 11 (Wiley, New York, 1971).
Holland, H. D., Geochim. cosmochim. Acta, 36, 637 (1972).
Fairhall, A. W., Nature, 245, 20 (1973).
Zimen, K. E., and Altenhein, F. K., Naturwissenschaften, 4, 198 (1973).
Fairhall, A. W., and Erickson, J. L., Nature, 254, 273 (1975).
Möller, P., and Parekh, P. P., Sci. total Environ., 4, 177 (1975).
Whitfield, M., Nature, 247, 523 (1974); ibid., 254, 274 (1975).
Alexandersson, E. T., Bull. geol. Instn Univ. Uppsala, 3, 201 (1972).
Alexandersson, E. T., Science, 189, 47 (1975).
Alexandersson, E. T., Society of Economic Paleontologists and Mineralogists, 50th Anniversary Special Publication (edit. by Fairbridge, R. W.), ch. 29 (SEPM, Tulsa, Oklahoma, in the press).
Pytkowicz, R. M., Limnol. Oceanogr., 10, 220 (1965).
Li, Y-H., Takahashi, T., and Broecker, W. S., J. geophys. Res., 74, 5507 (1969).
Edmond, J. M., Deep-Sea Res., 21, 455 (1974).
Broecker, W. S., and Takahashi, T., J. geophys. Res., 71, 1575 (1966).
Möller, P., and Parekh, P. P., Marine Chemistry, 3, 63 (1975).
Lees, A., Marine Geology, 19, 159 (1975).
Murray, J., and Renard, A. F., Deep-sea Deposits. Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873–1876. (H. M. Stationery Office, 1891).
Bathurst, R. G. C., Developments in Sedimentology, 12 (Elsevier, Amsterdam, 1971); A. Rev. Earth planet. Sci., 2, 257 (1974).
Milliman, J. D., Recent Sedimentary Carbonates, part 1, Marine Carbonates (Springer, New York, 1974).
Chave, K. E., Deffeyes, K. S., Weyl, P. K., Garrels, R. M., and Thompson, M. E., Science, 137, 33 (1962).
Chave, K. E., and Schmalz, R. F., Geochim. cosmochim. Acta, 30, 1037 (1966).
Weyl, P. K., Stud. trop. Oceanogr. Miami, 5, 178 (1967).
Schroeder, J. H., Dwornik, E. J., and Papike, J. J., Bull. geol. Soc. Am., 80, 1613 (1969).
Milliman, J. D., Gastner, M., and Müller, J., Bull. geol. Soc. Am., 82, 573 (1971).
Mutvei, H., Calcified Tissue Res. (in the press).
Neumann, A. C., and Land, L. S., J. sedim. Petrol., 45, 763 (1975).
Alexandersson, E. T., J. sedim. Petrol., 42, 441 (1972).
Glover, E. D., and Pray, L. C., The Johns Hopkins University Studies in Geology (edit. by Bricker, O. P., 19), 80 (Johns Hopkins University Press, 1971).
Boyer, B. W., J. sedim. Petrol., 42, 205 (1972).
Alexandersson, E. T., J. sedim. Petrol., 44, 7 (1974).
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Alexandersson, E. Actual and anticipated petrographic effects of carbonate undersaturation in shallow seawater. Nature 262, 653–657 (1976). https://doi.org/10.1038/262653a0
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DOI: https://doi.org/10.1038/262653a0
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