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Discordant calc-silicate bodies from the St. Just aureole, Cornwall

Published online by Cambridge University Press:  05 July 2018

D. H. M. Alderton  and
N. J. Jackson
D. H. M. Alderton
Affiliation:
Department of Geology, The University, Keele, Staffs. ST5 5BG, England
N. J. Jackson
Affiliation:
Institute of Applied Geology, King Abdul Aziz University, Jeddah, Saudi Arabia
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Summary

Several discordant, garnet-bearing bodies are described from the St. Just part of the Land's End granite aureole, Cornwall. It is suggested that these formed by a combination of metasomatic replacement and dilation with concomitant precipitation. Other Ca-Fe aluminosilicates (containing large amounts of Zn, Sn, B, and Be) are also present in the bodies. The chemical, petrographic, and field evidence suggests that the introduced material was transported by hydrothermal fluids. These fluids could well be related to the intrusion of the granite and the earliest phases of ore mineralization. Chemical analyses of garnets, calcic amphiboles and one apatite, epidote, diopside, and axinite are given.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 324 , December 1978 , pp. 427 - 434
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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References

Alderton, (D. H. M.) and Jackson, (N. J.), 1974. In Metallization associated with acid magmatism, 1, Geological Survey, Prague, 297–303.Google Scholar
Bennett, (H.) and Reed, (R. A.), 1971. Chemical methods of silicate analysis, Academic Press, London and New York.Google Scholar
Bilgrami, (S. A.) and Howie, (R. A.), 1960. Am. Mineral. 45, 791–801.Google Scholar
Bottinga, (Y.) and Javoy, (M.), 1975. Reviews of Geophys. and Space. Phys. 13, 401-18.CrossRefGoogle Scholar
Chinner, (G. A.) and Fox, (J. S.), 1974. Geol. Mag. 111, 397–408.CrossRefGoogle Scholar
Couper, (A. G.) and Barstow, (R. W.), 1977. Mineral. Record, 8, 294-7.Google Scholar
Dadák, (V.) and Novák, (F.), 1965. Mineral. Mag. 35, 379-85.Google Scholar
Deer, (W. A.), Howie, (R. A.), and Zussman, (J.), 1966. An introduction to the rock-forming minerals, Longmans, London.Google Scholar
Dines, (H. G.), 1956. The metalliferous mining region of southwest England, 1, H.M.S.O., London.Google Scholar
Easton, (A. J.), Hamilton, (D.), Kempe, (D. R. C.), and Sheppard, (S. M. F.), 1977. Phil. Trans. R. Soc. London, 286A, 253-71.Google Scholar
El Sharkawi, (M. A. H.) and Dearman, (W. R.), 1966. Econ. Geol. 61, 362-9.CrossRefGoogle Scholar
Firman, (R. J.), 1957. Q.J. geol. Soc. 113, 205–22.CrossRefGoogle Scholar
Floyd, (P. A.), 1965. J. Petrol. 6, 223-45.CrossRefGoogle Scholar
Floyd, (P. A.), 1967. Chem. Geol. 2, 147–56.CrossRefGoogle Scholar
Floyd, (P. A.), 1968. Proc. Ussher Soc. 2, 45–51.Google Scholar
Floyd, (P. A.), 1971. Ibid. 2, 335–51.Google Scholar
Floyd, (P. A.), 1975. Geol. Mag. 112, 315-19.CrossRefGoogle Scholar
Floyd, (P. A.), 1976. J. Petrol. 17, 522–45.CrossRefGoogle Scholar
Grinstead, (R. R.) and Snider, (S.), 1967. Analyst, 92, 532-3.CrossRefGoogle Scholar
Hall, (A.), 1971. Proc. Geol. Assoc. 82, 209-30.CrossRefGoogle Scholar
Hall, (A.), and Walsh, (J. N.), 1969. Anal. Chim. Acta, 45, 341-2.CrossRefGoogle Scholar
Hamaguchi, (H.) and Kuroda, (R.), 1969. Tin, in Handbook of Geochemistry, Vol. II-I. Springer-Verlag, Berlin, Heidelberg, and New York.Google Scholar
Hellwege (H. von), , 1956. Hamburger Beitr. angew. Miner. 1, 73–136.Google Scholar
Hutchinson, (A.), 1900. Mineral. Mag. 12, 274-81.Google Scholar
Jackson, (N. J.), 1976. The geology and mineralisation of the St. Just district, with particular reference to Levant Mine. Unpubl. Ph.D. thesis, University of London.Google Scholar
King, (B. C.), 1948. J. Geol. 56, 459-75.CrossRefGoogle Scholar
Kingsbury, (A. W. G.), 1961. Mineral. Mag. 32, 921-40.Google Scholar
Leake, (B. E.) and Winchell, (H.), 1978. Mineral. Mag. 42, 533.CrossRefGoogle Scholar
Lemmlein, (G. G.) and Klevtsov, (P. V.), 1961. Geochemistry, 2, 148-58.Google Scholar
Lessing, (P.) and Standish, (R. P.), 1973. Am. Mineral. 58, 840-2.Google Scholar
MacKenzie, (D. M.), 1972. Proc. Ussher Soc. 2, 410-16.Google Scholar
McIver, (J. R.) and Mihálik, (P.), 1975. Can. Mineral. 13, 217-21.Google Scholar
Mill, (V. B.) and Kalinin, (D. Y.), 1966. Dokl. Akad. nauk. SSSR, 167, 655-8.(in Russian).Google Scholar
Mulligan, (R.) and Jambor, (J. L.), 1968. Can. Mineral. 9, 358-70.Google Scholar
Murad, (E.), 1976. Mineral Mag. 40, 715-19.CrossRefGoogle Scholar
Prinz, (M.), 1967. In Basalts, Vol. I of the Poldervaart treatise, 271–323. Interscience, New York, London, and Sydney.Google Scholar
Read, (J. I.), 1972. Analyst, 97, 134-7.CrossRefGoogle Scholar
Reid, (C.) and Scrivenor, (J. B.), 1906. Geology of the country near Newquay. Mere. Geol. Surv. G.B., H.M.S.O.Google Scholar
Reynolds, (D. L.), 1947. Geol. Mag. 84, 33–50.CrossRefGoogle Scholar
Rickwood, (P. C.), 1968. Contrib. Mineral. Petrol. 18, 175-98.CrossRefGoogle Scholar
Riley, (J. P.), 1958. Anal. Chim. Acta, 19, 413-28CrossRefGoogle Scholar
Sheppard, (S. M. F.), 1977. J. Geol. Soc. 133, 573-91.CrossRefGoogle Scholar
Shoji, (T.), 1974. [J. Min. Soc. Japan. 11, 359-72 (in Japanese)] abstr, in Mineral. Abstr. 78-437.Google Scholar
Suzuoki, (T.) and Epstein, (S.), 1976. Geochim. Cosmoehim. Acta, 40, 1229-40.CrossRefGoogle Scholar
Taylor, (B. E.) and O'Neil, (J. R.), 1977. Contrib. Mineral. Petrol. 63, 1–49.CrossRefGoogle Scholar
Tilley, (C. E.), 1935. Mineral. Mag. 24, 181–202.Google Scholar
Tilley, (C. E.) and Flett, (J. S.), 1930. Summ. Progr. Geol. Surv. G.B. (for 1929), 24-41.Google Scholar
Vallance, (T. G.), 1967. J. Petrol. 8, 84–96.CrossRefGoogle Scholar
Waal, (S. A. de), 1969. Trans. Geol. Soc. S. Africa, 72, 23-7.Google Scholar
Washington, (H. S.), 1930. The Chemical Analysis of Rocks. John Wiley, New York, 4th edn.Google Scholar
Wedepohl, (K. H.), 1972. Zinc, in Handbook of Geochemistry, Vol. II-I, Springer-Verlag, Berlin, Heidelberg, and New York.CrossRefGoogle Scholar
Wilson, (A. D.), 1955. Bull. Geol. Surv. G.B. 9, 56-8.Google Scholar