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The ledmorite dike of Achmelvich, near Lochinver, Sutherland

Published online by Cambridge University Press:  14 March 2018

P. A. Sabine
P. A. Sabine*
Affiliation:
Geological Survey and Museum, London
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Extract

In the Geological Survey memoir a dike is recorded cutting the Lewisian gneiss near Achmelvich, north-west of Lochinver, Sutherland. At the time the mapping was carried out no thin section was prepared of the rock, and the dike was presumed to be a continuation of the Canisp porphyry dike which is exposed in the river Inver near Lochinver and farther south-east.

During an investigation of the post-Cambrian sills and dikes of Assynt and the adjoining districts of north-west Scotland, the writer examined the Achmelvich dike in some detail and recognized its affinities with the nepheline-syenites. It is the purpose of the present note to describe the field occurrence and petrography of the dike.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 29 , Issue 216 , March 1952 , pp. 827 - 832
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1952

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References

page 827 note 3 B. N. Peach et al. The geological structure of the north–west Highlands of Scotland. Mem. Geol. Surv. Great Britain, 1907.

page 830 note 1 Borolanite was named after Loch Borolan, as it was then spelt. Following customary Geological Survey practice place–names are here given as on the one–inch map, and the loch is therefore now spelt Borrolan.

page 830 note 2 Home, J. and Teall, J. J. H.. On borolanite–—an igneous rock intrusive in the Cambrian limestone of Assynt, Sutherlandshire, and the Torridon sandstone of Ross–shire. Trans. Roy, Soc. Edinburgh, 1892, vol. 37, pp. 163–178.Google Scholar

page 830 note 3 Shand, S. J.. On borolanite and its associates in Assynt. (Second comraunication.) Trans. Edinburgh Geol. Soc., 1910, vol. 9, pp. 376–416.Google Scholar

page 831 note 1 Johannscn, A.. A descriptive petrography of the igneous rocks. Chicago, 1938, vol. 4, p. 117 Google Scholar.

page 832 note 1 Shand, S. J., Loch Borolan laccolith, northwest Scotland. Journ. Geol. Chicago, 1939, vol. 47, pp. 408–420 Google Scholar.