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On the occurrence of neptunite and eudialyte in quartzbearing syenites from Barnavave, Carlingford, Ireland

Published online by Cambridge University Press:  14 March 2018

S. R. Nockolds
S. R. Nockolds*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Extract

Some years ago the author gave a short description of a quartz-bearing syenite and its xenoliths occurring on the eastern side of Barnavave. The locality was revisited recently and more material wascollected, while another outcrop of syenite was discovered farther tothe north at locality 5.

The new material collected at the original locality is not very differentfrom that previously described. The syenite occurs as veins in lime-stone and, whereas all the previously described material was quartz-bearing, some of the syenite in very narrow veins is virtually free fromquartz. Again, certain specimens carry a fair amount of late-crystallizing wollastonite which may be replaced to a varying degree by pecto-lite.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 29 , Issue 208 , March 1950 , pp. 27 - 33
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1950

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References

Page 27 note 1. Nockolds, S. R., Geol. Mag., 1937, vol. 74, p. 125 CrossRefGoogle Scholar.

Page 27 note 2. Nockolds, S. R., Min. Mag., 1947, vol. 28, map p. 156 CrossRefGoogle Scholar.

Page 28 note 1. Larsen, E. S., Bull. U.S. Geol. Survey, 1934, no. 848. p. 127. [M.A, 5-481.]Google Scholar

Page 30 note 1. Lacroix, A., Min. de Madagascar, 1922, vol. 1, p. 589 Google Scholar.

Page 31 note 1. Nockolds, S. R., Geol. Mag., 1937. vol. 74, p. 130 CrossRefGoogle Scholar.

Page 31 note 2. S. R. Nockolds, loc. cit.

Page 32 note 1. Tilley, C. E., Geol. Mag., 1949, vol. 86, p. 81.CrossRefGoogle Scholar

Page 33 note 1. Daly, R. A., Bull. Geol. Soc. America, 1910, vol. 21, p. 87; Jourm Geol. Chicago, 1918, vol. 26, p. 97 CrossRefGoogle Scholar.