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The diagnostic geochemistry, relative abundance, and spatial distribution of high-calcium, low-alkali olivine tholeiite dykes in the Lower Tertiary regional swarm of the Isle of Skye, NW Scotland

Published online by Cambridge University Press:  05 July 2018

D. P. Mattey ,
I. L. Gibson ,
G. F. Marriner  and
R. N. Thompson
D. P. Mattey
Affiliation:
Department of Geology, Bedford College, London NW1 4NS
I. L. Gibson
Affiliation:
Department of Geology, Bedford College, London NW1 4NS
G. F. Marriner
Affiliation:
Department of Geology, Bedford College, London NW1 4NS
R. N. Thompson
Affiliation:
Department of Geology, Bedford College, London NW1 4NS
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Summary

Dykes from four sections across the axis of the Skye regional swarm have been analysed for major elements, Nb, Rb, Sr, Y, Zr, and rare-earth elements. 70 % of the dykes are characterized by relatively high CaO (11–12%), and low abundance of elements such as TiO2 (∼1%), K2O (0·05–0·20 %), Zr (30–60 ppm), with a light-rare-earth depleted chondrite normalized pattern. The remainder of the swarm comprises dykes equivalent in composition to the Skye Main Lava Series and dykes belonging to a further magma type distinguished by a flat chondrite normalized rare-earth pattern. The high-calcium, low-alkali tholeiite dykes are confined to a narrow persistent zone forming the major axis of dilation of the swarm; other basaltic dykes are axially less persistent and have a wider lateral distribution. The more evolved dykes tend to be restricted to central Skye.

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 318 , June 1977 , pp. 273 - 285
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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Footnotes

1

Department of Geology, Imperial College of Science and Technology, London SW7 2AZ.

References

Anderson, (F. W.) and Dunham, (K. C), 1966. The geology of Northern Skye. Mem. Geol. Surv. U.K. Google Scholar
Cawthorn, (R. G.), Ford, (C. E.), Biggar, (G. M.), Bravo, (M. S.), and Clarke, (D. B.), 1973. Earth Planet. Sci. Lett. 21, 1–5.CrossRefGoogle Scholar
Esson, (J.), Dunham, (A. C), and Thompson, (R. N.), 1975. J. Petrol. 16, 488–97.CrossRefGoogle Scholar
Hart, (S. R.), 1971. Earth Planet. Sci. Lett. 6, 295–303.CrossRefGoogle Scholar
Lamacraft, (H.), 1976. Ph.D. Thesis (in prep.), University of London.Google Scholar
Melson, (W. G.), Thompson, (G.), and Van Andel, (T. H.), 1968. J. Geophys. Res. 73, 5925–41.CrossRefGoogle Scholar
Patterson, (E. M.), 1955. Proc. R. Ir. Acad. 57(B), 155–78.Google Scholar
Pearce, (J. S.) and Cann, (J. R.), 1973. Earth Planet. Sci. Lett. 19, 290–300.CrossRefGoogle Scholar
Sigvaldason, (G. E.), 1974. J. Petrol. 15, 497–524.CrossRefGoogle Scholar
Speight, (J. M.), 1972. Unpublished Ph.D. thesis, University of London.Google Scholar
Thompson, (R. N.), Esson, (J.), and Dunham, (A. C), 1972. J. Petrol. 13, 219–53.CrossRefGoogle Scholar
Thompson, (R. N.), Esson, (J.), and Dunham, (A. C), 1974. Contrib. Mineral. Petrol. 45, 317–41.CrossRefGoogle Scholar
Wilson, (R. L.), Ade-Hall, (J. M.), Skelhorn, (R. R.), Speight, (J. M.), and Dagley, (P.), 1974. Geophys. J.R. Astron. Soc. 37, 23–30.CrossRefGoogle Scholar
Wood, (D. A.), Gibson, (I. L.), and Thompson, (R. N.), 1976. Contrib. Mineral. Petrol. 55, 241–54.CrossRefGoogle Scholar