Abstract
IN a recent paper L. R. Wager1 concluded “… it still seems to be an entirely open question whether the slightly unusual composition of the original Skaergaard magma is a sufficient cause for the Skaergaard fractionation trend, which differs so notably from the trends usually obtained from studies of the varying composition of consanguineous basaltic lavas”. We have strong evidence from the chemical composition of a group of modern basaltic lavas extruded from the Icelandic volcanoes Eldgja and Katla, that they are an example of the Skaergaard fractionation trend considered to result from crystal, fractionation.
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References
Wager, L. R., J. Petrol., 1, Part 3, 364 (1960).
Wager, L. R., and Mitchell, R. L., Geochim. Cosmochim. Acta, 1, No. 3, 129 (1951).
Ahrens, L. H., Mineralog. Mag., 30, No. 226, 467 (1954).
Thorarinsson, S., Bull. Volcanolog., Ser. II, 23, 45 (1960).
Mitchell, R. L., Commonwealth Bur. Soil Sci., Tech. Comm. No. 44 (1948).
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ROBSON, G., SPECTOR, J. Crystal Fractionation of the Skaergaard Type in Modern Icelandic Magmas. Nature 193, 1277–1278 (1962). https://doi.org/10.1038/1931277b0
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DOI: https://doi.org/10.1038/1931277b0
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