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Clinopyroxenes and biotites from the Centre III igneous complex, Ardnamurchan, Argyllshire

Published online by Cambridge University Press:  05 July 2018

J. N. Walsh
J. N. Walsh*
Affiliation:
Department ofGeology, King's College, Strand, London WC2R 2LS
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Summary

Major- and trace-element analyses of the clinopyroxenes and biotites from the ring-intrusions of Centre III in the Tertiary igneous complex of Ardnamurchan are presented. It is shown that there are systematic differences in mineral chemistry between the eucrites, the gabbros, and the dolerites, and in particular the clinopyroxenes show an iron enrichment trend that is similar to that found in fractionated tholeiitic intrusions. The minerals from the intcrmediate rocks, the tonalite and quartz monzonite in the centre of the complex, do not show the further iron enrichment expected if these rocks had formed by continued fractionation of basic magma. On the basis of the chemistry of the clinopyroxenes and biotites, the intermediate rocks are interpreted as hybrids formed by the remelting and assimilation of country rocks into basic magma.

Type
Research Article
Information
Mineralogical Magazine , Volume 40 , Issue 312 , December 1975 , pp. 335 - 345
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1975

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References

Atkins, (F. B.), 1969. Journ. Petrology, 10, 222-49.CrossRefGoogle Scholar
Bradshaw, (N.), 1961. Ph.D. thesis, University of Manchester.Google Scholar
Brown, (G. M.), 1957. Min. Mag. 31, 511-43.Google Scholar
Brown, (G. M.), 1967. In Basalts; The Poldervaart treatise on rocks of basaltic composition, 1. J. Wiley (New York & London).Google Scholar
Brown, (G. M.) and Vincent, (E. A.), 1963. Journ. Petrology, 4, 175-97.CrossRefGoogle Scholar
Carmichael, (I. S. E.), 1960. Ibid., 1, 309-36.CrossRefGoogle Scholar
Deer, (W. A.), 1937. Min. Mag. 24, 495-502.Google Scholar
Deer, (W. A.), Howie, (R. A.), and Zussman, (J.), 1962. Rock-forming minerals, 3. London (Longmans).Google Scholar
Gibb, (F. G. F.), 1973. Journ. Petrology, 14, 203-30.CrossRefGoogle Scholar
Haslam, (H. W.), 1968. Ibid., 9, 84-104.CrossRefGoogle Scholar
Konda, (T.), 1970. Contr. Miner. Petrol. 29, 338-44.CrossRefGoogle Scholar
Larsen, (E. S.) and Draisin, (W. M.), 1948. XVIII Internat. Geol. Congress (Great Britain), Part 3, 66-79.Google Scholar
Larsen, (E. S.) and Schmidt, (R. G.), 1958. U.S. Geol. Surv. Bull. 1070-A.Google Scholar
Muir, (I. D.), 1951. Min. Mag. 29, 690-714.Google Scholar
Murray, (R. J.), 1954. Geol. Mag. 91, 17-31.CrossRefGoogle Scholar
Nockolds, (S. R.), 1941. Quart. Journ. Geol. Soc. 97, 451.Google Scholar
Poldervaart, (A.) and Hess, (H. H.), 1951. Journ. Geol. 59, 472.CrossRefGoogle Scholar
Richey, (J. E.), Thomas, (H. H.), and others, 1930. The Geology of Ardnamurchan, North-west of Mull and Coll. Mere. Geol. Surv. Scotland. Google Scholar
Wager, (L. R.) and Brown, (G. M.), 1968. Layered igneous rocks. Oliver & Boyd (London).Google Scholar
Walsh, (J. N.), 1971. Ph.D. thesis, University of London.Google Scholar
Wilkinson, (J. F. G.), 1957. Geol. Mag. 94, 123-34.CrossRefGoogle Scholar
Wills, (K. J. A.), 1970. B.Sc. thesis, University of London, Imperial College.Google Scholar
Witkind, (I. J.), 1969. Amer. Min. 54, 1118-37.Google Scholar
Wones, (D. R.) and Eugster, (H. P.), 1965. Ibid. 50, 1228-72.Google Scholar