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The Petrogenesis of Hornblende-mica-lamprophyre Dykes at South Hill, Jersey, C. I.

Published online by Cambridge University Press:  01 May 2009

A. C. Bishop
A. C. Bishop
Affiliation:
Department of Geology, Queen Mary College, Mile End Road, London, E. 1.
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Abstract

At South Hill, 1/2 mile south-east of St. Helier, two hornblende-mica-lamprophyre dykes cut the Fort Regent granophyre. They are themselves displaced by two gently dipping shear zones and a dolerite dyke belonging to the main Jersey dyke swarm cuts the granophyre, lamprophyres, and shears, Petrographically the lamprophyres are of the spessartite-kersantite type, but the presence of euhedral brown amphibole invites comparison with the camptonites. The genesis of the lamprophyres is discussed and a significant role is assigned to volatile constituents.

Type
Articles
Information
Geological Magazine , Volume 101 , Issue 4 , 24 August 1964 , pp. 302 - 313
Copyright
Copyright © Cambridge University Press 1964

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References

REFERENCES

Bowen, N. L., 1928. The evolution of the igneous rocks. Princeton.Google Scholar
Eugster, H. P., 1956. Stability of hydrous iron silicates. Ann. Rep. geophys. Lab., Washington, Year Book, 55, 158–161.Google Scholar
Eugster, H. P., and Yoder, H. S., 1955. The join muscovite-paragonite. Ann. Rep. geophys. Lab., Washington, Year Book, 54, 124–9.Google Scholar
Knopf, A., 1936. Igneous geology of the Spanish Peaks region, Colorado. Bull. geol. Soc. Amer., 47, 1728–1784.CrossRefGoogle Scholar
Smith, H. G., 1936. The South Hill lamprophyre, Jersey. Geol. Mag., 73, 87–91.CrossRefGoogle Scholar
Smith, H. G., 1946. The lamprophyre problem. Geol. Mag., 83, 165–171.CrossRefGoogle Scholar
Vincent, E. A., 1953. Hornblende-lamprophyre dykes of basaltic parentage from the Skaergaard area, East Greenland. Quart. J. geol. Soc. Lond., 99, 21–47.CrossRefGoogle Scholar
Wells, A. K., and Bishop, A. C., 1955. An appinitic facies associated with certain granites in Jersey, C.I. Quart. J. geol. Soc. Lond., 111, 143–166.CrossRefGoogle Scholar