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On the Graphical Representation of Differentiation Trends in Igneous Rocks

Published online by Cambridge University Press:  01 May 2009

E. S. W. Simpson
E. S. W. Simpson
Affiliation:
Department of Geology, University of Cape Town, South Africa.
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Abstract

This paper describes a revised method of plotting analyses of igneous rock suites using the Mafic and Felsic Indices as defined. A composite M–F diagram has certain advantages over the triangular iron-magnesia-alkalis diagram and enables a genetic distinction to be made between the tholeiitic and calc-alkaline series.

Type
Articles
Information
Geological Magazine , Volume 91 , Issue 3 , June 1954 , pp. 238 - 244
Copyright
Copyright © Cambridge University Press 1954

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References

REFERENCES

Bowen, N. L., 1928. The Evolution of the Igneous Rocks. Princeton.Google Scholar
Daly, R. A., 1933. Igneous Rocks and the Depths of the Earth. New York.Google Scholar
Muir, I. D., 1951. The clinopyroxenes of the Skaergaard intrusion, eastern Greenland. Miner. Mag., xxix, 690–714.Google Scholar
Nockolds, S. R., 1941. The Garabal Hill–Glen Fyne igneous complex. Quart. Journ. Geol. Soc., xcvi, 451–511.Google Scholar
Nockolds, S. R., and Allen, R., 1953. The geochemistry of some igneous rock series. Geochim. et Cosmochim. Acta, iv, 105–142.CrossRefGoogle Scholar
Peacock, M. A., 1931. Classification of igneous rock series. Journ. Geol., xxxix, 54–67.CrossRefGoogle Scholar
Poldervaart, A., 1949. Three methods of graphic representation of chemical analyses of igneous rocks. Trans. Roy. Soc. S. Africa, xxxii, 177–188.CrossRefGoogle Scholar
Tilley, C. E., 1950. Some aspects of magmatic evolution. Quart. Journ. Geol. Soc., cvi, 37–61.CrossRefGoogle Scholar
Wager, L. R., and Deer, W. A., 1939. Geological investigations in East Greenland. III: The petrology of the Skaergaard intrusion, Kangerdlugssuak, East Greenland. Medd. om Grønland, cv, No. 4.Google Scholar
Walker, F., and Poldervaart, A., 1949. Karroo dolerites of the Union of South Africa. Bull. Geol. Soc. Amer., lx, 591–706.CrossRefGoogle Scholar