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How should igneous rocks be grouped?

Published online by Cambridge University Press:  01 May 2009

N. M. S. Rock
N. M. S. Rock
Affiliation:
Institute of Geological Sciences, West Mains Road, Edinburgh EH9 3LA, Scotland
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Summary

Despite their importance and frequency of usage, ‘grouping terms’ in petrology such as Association, Family, Lineage, Province, Series and Suite appear to lack established meanings. Partly by analogy with the recently standardized stratigraphic nomenclature, hierarchies of such terms are suggested to cover petrographic classification (rock-names), petrological classification (rock-names extended to magma-types), geographic classification (igneous provinces) and tectono-genetic classification (rock assemblages characteristic of particular tectonic regimes). Used in this way, the exact implications of each term become clearer. Again by analogy with stratigraphy, ‘Super-’ and ‘Sub-’ groupings are suggested in a few cases: ‘Subprovince’ for example can differentiate distinct rock assemblages related to separate parent magmas within one well-defined Province (e.g. nephelinite-carbonatite and basalt-trachyte assemblages in the East African Rift), and ‘Superprovince’ can be used to group coeval Provinces now separated by opened oceans, etc. (e.g. Thulean Superprovince composed of Hebridean, East Greenland, etc., Provinces). The term ‘Province’ itself carries several ambiguities; it is best confined to cases where the ages of the spatially associated igneous rocks fall within a narrow range (e.g. Oslo Province); ‘Belt’ is suggested for those where the age-range is more substantial (e.g. Jurassic-Tertiary magmatism of Southeast Brazil).

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Geological Magazine , Volume 118 , Issue 5 , September 1981, pp. 449 - 461
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Copyright © Cambridge University Press 1981

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References

AGI (American Geological Institute). 1980. Glossary of Geology. (Ed. Bates, R. L. and Jackson, J. A.). 2nd edn. Falls Church, Virginia.Google Scholar
Amaral, G., Bushee, J., Condani, U. G., Kawashita, K. & Reynolds, J. H. 1967. Potassium-argon ages of alkaline rocks from S. Brazil. Geochim. cosmochim. Acta 31, 117–30.CrossRefGoogle Scholar
Bailey, D. K. 1960. Carbonatites in the Rufunsa Valley, Feira District. Bull. N. Rhodesia Geol. Surv. 5.Google Scholar
Bemmelen, R. W. van. 1949. The Geology of Indonesia, 2 vols., 1st ed. The Hague: Martinus Nijhoff.Google Scholar
Carmichael, I. S. E., Turner, F. J. & Verhoogen, J. 1974. Igneous Petrology. New York: McGraw-Hill.Google Scholar
Currie, K. L. 1976. The alkaline rocks of Canada. Bul. geol. Surv. Can. 239.Google Scholar
Daly, R. A. 1914. Igneous Rocks and Their Origin. New York: McGraw-Hill.Google Scholar
Hedberg, H. D. 1976. International Stratigraphic Guide. New York: Wiley.Google Scholar
Heinrich, E. W. 1966. The Geology of Carbonatites. Chicago: Rand McNally.Google Scholar
Holland, C. H. & 17 others. 1978. A guide to stratigraphical procedure. Geol. Soc. Lond. Special Report, 10.Google Scholar
Irvine, T. N. & Baragar, W. R. A. 1971. A guide to the chemical classification of the common volcanic rocks Can. J. Earth Sci. 8, 523–48.Google Scholar
Joplin, G. A. 1968. The Shoshonite Association: a review J. geol. Soc. Aust. 15, 275–94.Google Scholar
Le Bas, M. J. 1977. Carbonatite-nephelinite Volcanism. New York: Wiley.Google Scholar
Le Bas, M. J. & Sabine, P. A. 1980. Progress in 1979 on the nomenclature of pyroclastic materials Geol. Mag. 117, 389–91.CrossRefGoogle Scholar
Marsh, J. S. 1973. Relationships between transform directions and alkaline igneous rock lineaments in Africa & S. America Earth Plan. Sci. Lett. 18, 317–323.CrossRefGoogle Scholar
Mitchell, R. H. 1979. The alleged kimberlite-carbonatite relationship: additional contrary mineralogical evidence Am. J. Sci. 279, 570–89.CrossRefGoogle Scholar
Mitchell, R. H. & Platt, R. G. 1979. Nepheline-bearing rocks from the Poohbah Lake complex, Ontario: Malignites and Malignites Contr. Miner. Petr. 69, 255–64.CrossRefGoogle Scholar
Mueller, R. F. & Saxena, S. K. 1977. Chemical Petrology. New York: Springer-Verlag.CrossRefGoogle Scholar
Rock, N. M. S. 1977. The nature and origin of lamprophyres: some definitions, distinctions and derivations Earth-Sci. Rev. 13, 123–69.CrossRefGoogle Scholar
Russell, M. J. & Smythe, D. K. 1978. Evidence for an early Permian Oceanic Rift in the northern North Atlantic. In Petrology and Geochemistry of Continental Rifts, (Ed. Neumann, E. R. and Ramberg, I. B.), pp. 173–9. Dordrecht: Reidel.CrossRefGoogle Scholar
Sabine, P. A. 1974. How should rocks be named? Geol. Mag. 111, 165–76.CrossRefGoogle Scholar
Sabine, P. A. 1978. Progress on the nomenclature of volcanic rocks, carbonatites, melilite-rocks and lamprophyres Geol. Mag. 115, 463–6.CrossRefGoogle Scholar
Shand, S. J. 1951. The Study of Rocks, 3rd ed. London: Thomas Murby.Google Scholar
Sorensen, H. 1974. The Alkaline Rocks. New York: Wiley.Google Scholar
Stewart, D. C. & Thornton, C. P. 1975. Andesite in oceanic regions Geology 3, 565–8.2.0.CO;2>CrossRefGoogle Scholar
Streckeisen, A. 1976. To each plutonic rock its proper name Earth-Sci. Rev. 12, 1–33.Google Scholar
Streckeisen, A. 1979. Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks Neues Jb Miner. Abh. 134, 1–14.Google Scholar
Tomkeiff, S. I. 1961. Alkalic ultrabasic rocks and carbonatites in the USSR International Geol. Rev. 3 (9), 739–58.Google Scholar
Tyrrell, G. W. 1926. The Principles of Petrology, 1st ed. New York: Dutton.Google Scholar
Vail, J. R. 1978. Outline of the geology and mineral deposits of the Democratic Republic of Sudan. Inst. Geol. Sci. Overseas Geol. Min. Res. no. 49.Google Scholar
Whitford, D. J., Nicholls, J. A. & Taylor, S. R. 1979. Spatial Variation in the geochemistry of Quaternary lavas across the Sunda Arc in Java and Bali Contr. Miner. Petr. 70, 341–56.CrossRefGoogle Scholar
Wright, J. B. 1965. Petrographic subprovinces of Kenya Geol. Mag. 102, 541–57.CrossRefGoogle Scholar