Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-10T14:06:21.582Z Has data issue: false hasContentIssue false
  • English
  • Français

Early basic magmatism in the evolution of Archaean high-grade gneiss terrains: an example from the Lewisian of NW Scotland

Published online by Cambridge University Press:  05 July 2018

H. R. Rollinson
H. R. Rollinson*
Affiliation:
School of Geography and Geology, Faculty of Sciences, College of St. Paul and St. Mary, The Park, Cheltenham GL50 2RH
Get access Rights & Permissions [Opens in a new window]

Abstract

Amphibolite blocks from an Archaean (2.9 Ga) trondhjemite-agmatite complex in the Lewisian at Gruinard Bay have a varied trace element and REE content. Whilst some of the variability is attributable to element mobility during high-grade metamorphism and subsequent trondhjemite magmatism, it is for the main part considered to be a primary feature of the amphibolites. The observed trace element and REE chemistry is best explained in terms of source region heterogeneity and suggests a melting regime comparable with that beneath certain types of mid-ocean ridge. There are geochemical similarities between the amphibolites and the Lewisian layered gabbro-ultramafic complexes, and the two may represent the derivative liquid and associated cumulates respectively from a common parent magma. Thus there is a parallel between the processes which generated some Archaean amphibolites and layered gabbro complexes and those operating beneath modern ocean ridges. Hornblendite and amphibolite pods enclosed within tonalitic gneiss, also found as blocks in the agmatite complex, are geochemically distinct from the main group of amphibolites and are probably of calc-alkaline parentage.

Keywords

magmatismgneissamphiboliteLewisianScotland
Type
Petrology
Information
Mineralogical Magazine , Volume 51 , Issue 361 , September 1987 , pp. 345 - 355
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Arth, J.G., Barker, F., Peterman, Z.E., and Friedman I. (1978) J. Petrol. 19, 289316.Google Scholar
Bougault, H. and Treuil, M. (1980) Nature, 286, 209-12.Google Scholar
Cartwright, I., Fitches, W.R., O'Hara, M.J., Barnicoat, C., and O'Hara, S. (1985) Scott. J. Geol. 21, 187-96.Google Scholar
Chamberlain, V.E., Lambert, R.S.. J., and Holland, J.G. (1986) Geochim. Cosmochim. Acta, 50, 37-48.Google Scholar
Condie, K.C. (1982) In Andesites: orogenic Andesites and related rocks. (R. S. Thorpe, ed.). Wiley. 575-90.Google Scholar
Condie, K.C. Viljoen, M.J., and Kable, E.J.D. (1977) Contrib. Mineral. Petrol. 64, 7589.Google Scholar
Davies, F.B. (1977) Scott. J. Geol. 13, 189-96.Google Scholar
Elliott, R.B. (1973) Contrib. Mineral. Petrol. 38, 719.Google Scholar
Floyd, P.A. and Winchester, J.A. (1975) Earth Planet. Sci. Lett. 27, 211-18.Google Scholar
Friend, C.R.L., Hall, R.P., and Hughes, D.J. (1981) Spec. Publs. geol. Soc. Aust. 7, 301-12.Google Scholar
Gromet, P.L. and Silver, L.T. (1983) Geochim. Cosmochim. Acta, 47, 925-39.Google Scholar
Hajash, A. (1984) Contrib. Mineral. Petrol. 85, 409-12.Google Scholar
Hall, R.P. (1980) Rapp. Gronlands geol. Unders. 97, 20 pp.Google Scholar
Hamilton, P.J., Evensen, N.M., O'Nions, R.K., and Tarney, J. (1979) Nature, 277, 258.Google Scholar
Hawkesworth, C.J. and O'Nions, R.K. (1977) J. Petrol. 18, 487-520.CrossRefGoogle Scholar
Hellman, P.L. and Henderson, P. (1977) Nature, 267, 38-40.CrossRefGoogle Scholar
Jahn, B.M., Grau, G., and Glikson, A.Y. (1982) Contrib. Mineral. Petrol. 82, 2540.Google Scholar
Jahn, B.M., Grau, G., and Glikson, A.Y. and Zhang, Z. (1984) Ibid. 85, 22443.Google Scholar
Ludden, J.N., Gelinas, L., and Trudel, P. (1982) Can. d. Earth Sci. 19, 227687.Google Scholar
Ludden, J.N., Gelinas, L., and Trudel, P. and Thompson, G. (1978) Nature, 274, 1479.CrossRefGoogle Scholar
Ludden, J.N., Gelinas, L., and Trudel, P. and Thompson, G. (1979) Earth Planet. Sci. Lett. 43, 8592.CrossRefGoogle Scholar
Menzies, M., Seyfried, W.J.., and Blanchard, D. (1979) Nature, 282, 398-99.CrossRefGoogle Scholar
Muecke, G.K., Pride, C., and Sarkar, P. (1979) In Origin and Distribution of the Elements, 2, (L. H. Ahrens, ed.). Pergamon, London.Google Scholar
Nakamura, N. (1974) Geochim. Cosmochim. Acta, 38, 75775.CrossRefGoogle Scholar
Nesbitt, R.W. and Sun, S.S. (1976) Earth Planet, Sci. Lett. 31, 433-53.CrossRefGoogle Scholar
Okeke, P.O., Watson, J.V., and Borley, G.D. (1983) Mineral. Mag. 47, 1 9 .CrossRefGoogle Scholar
Pearce, J.A. and Cann, J.R. (1973) Earth Planet. Sci. Lett. 19, 290300.CrossRefGoogle Scholar
Pearce, J.A. and Cann, J.R. and Norry, M.J. (1979) Contrib. Mineral. Petrol. 69, 3347.CrossRefGoogle Scholar
Pride, C. and Muecke, G.K. (1980) Ibid. 73, 403-12.Google Scholar
Rivalenti, G. (1976) In The Early History of the Earth. F. Windley, ed.) 21322. J. Wiley, London.Google Scholar
Rollinson, H.R. (1978) Ph.D. thesis, Univ. Leicester.Google Scholar
Rollinson, H.R. (1983) Mineral. Mag. 47, 267-80.CrossRefGoogle Scholar
Rollinson, H.R. and Fowler, M.B. (1987) Spec. publ. Geol. Soc. Lond. 27, 5771.CrossRefGoogle Scholar
Saunders, A.D. (1984) In Rare Earth Element Geochemistry, (P. Henderson ed.) Elsevier, 205-36.CrossRefGoogle Scholar
Sawaka, W.N., Chappell, B.W., and Norrish, K. (1984) Geology, 12, 131-4.2.0.CO;2>CrossRefGoogle Scholar
Sills, J.D. (1981) Ph.D. thesis, Univ. Leicester.Google Scholar
Sills, J.D. and Rollinson, H.R. (1987) Spec. publ. Geol. Soc. Lond. 27, 81-92.CrossRefGoogle Scholar
Sills, J.D. Savage, D., Watson, J.V., and Windley, B.F. (1982) Earth Planet. Sci. Lett. 58, 345-60.CrossRefGoogle Scholar
Sun, S.S. and Nesbitt, R.W. (1977) Earth Planet Sei.Lett. 35, 429-48.CrossRefGoogle Scholar
Sun, S.S. and Nesbitt, R.W. (1978) Contrib. Mineral. Petrol. 65, 301-25.CrossRefGoogle Scholar
Tarney, J., Wood, D.A., Saunders, A.D., Cann, J.R., and Varet, J. (1980) Phil. Trans. R. Soc. Lond.A 297, 179202.Google Scholar
Walsh, J.N., Buckley, F., and Barker, J. (1981) Chem.Geol. 33, 141-53.CrossRefGoogle Scholar
Watson, E.B. and Harrison, T.M. (1983) Earth Planet.Sci. Lett. 64, 295-304.CrossRefGoogle Scholar
Weaver, B.L. (1980) Contrib. Mineral. Petrol. 65, 301-25.Google Scholar
Weaver, B.L. and Tarney, J. (1980) Earth Planet. Sci. Lett. 51, 279-96.CrossRefGoogle Scholar
Weaver, B.L. and Tarney, J. (1981a) Nature, 289, 479.CrossRefGoogle Scholar
Weaver, B.L. and Tarney, J. (1981b) Earth Planet. Sci. Lett. 55, 17180.CrossRefGoogle Scholar
Weaver, B.L. and Tarney, J. and Windley, B. (1981) Geochim. Cosmochim Acta, 45, 711-25.CrossRefGoogle Scholar
Weaver, B.L. and Tarney, J. and Leake, B.E. (1982) Ibid. 46, 2203-15.Google Scholar
Windley, B.F. and Smith, J.V. (1976) Nature, 260, 67-15.CrossRefGoogle Scholar
Windley, B.F. and Smith, J.V. Bishop, F.C., and Smith, J.V. (1981) Ann. Rev. Earth Planet. Sci. 9, 175-98.CrossRefGoogle Scholar
Wood, D.A., Joron, J.-L., Treuil, M., Norry, M., and Tarney, J. (1979) Contrib. Mineral. Petrol. 70, 319-39.CrossRefGoogle Scholar