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Clinozoisite from Camaderry Mountain, Co. Wicklow

Published online by Cambridge University Press:  14 March 2018

R. W. Johnston
R. W. Johnston*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Extract

The clinozoisite to be described is found in veins traversing a metamorphosed basic intrusion exposed at the top of Camaderry Mountain, Glendalough, Co. Wicklow. This intrusion is a small boss of Lower Palaeozoic age which has been metamorphosed both by earth movement and by the intrusion of the Leinster granite. The rock exposed is now an amphibolite (fig. 1) within which are found the veins carrying clinozoisite with albite and a little prehnite, sphene, and tremolite. These veins, which are up to an inch in width, were probably introduced during the late stages of the basic intrusion as veins of lime-rich plagioclase.

Preliminary examination under the microscope shows that the clinozoisite is well crystallized, fresh, and free from inclusions. The colour in the hand-specimen is grey-white; in thin section it is colourless. Individual crystals are found up to 5 mm. in length. Twinning and intricate zoning are common.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 28 , Issue 204 , March 1949 , pp. 505 - 515
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1949

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References

Forbes, (E. H.), 1896. On the epidote from Huntington, Mass., and the optical properties of epidote. Amer. Journ. Sci., ser. 4, vol. 1, pp. 26–30.CrossRefGoogle Scholar
Goldschlag, (M.), 1917. Über die optischen Eigenschaften der Epidote. Tschermaks Min. Petr. Mitt., vol. 34, pp. 23–60. [M.A. 1–346.]CrossRefGoogle Scholar
Hietanen, (A.), 1938. On the petrology of Finnish quartzites. Bull. Comm. Géol. Finlande, no. 122. [M.A. 7–295.]Google Scholar
Ito, (T.), 1947. The structure of epidote. Amer. Min., vol. 32, pp. 309–321. [M.A. 10–212.]Google Scholar
Lacroix, (A.), 1910. Minéralogie de la France et ses colonies, vol. 4, p. 710.Google Scholar
Niggli, (P.), 1922. Epidot-Zoisitgruppe. Zeits. Krist., vol. 57, pp. 315–327.Google Scholar
Orlov, (A.), 1926. Sur les membres du groupe zoïsite-épidote pauvres en fer. Mere. Soc. Roy. Sci. Bohême, no. 19, 42 pp. [M.A. 3–352.]Google Scholar
Shannon, (E. V.), 1920. Proc. U.S. Nat. Museum, vol. 58, p. 476. [M.A. 1–213.]Google Scholar
Tempel, (H. G.), 1938. Der Einfluss der seltenen Erden und einiger anderer Komponenten auf die physikalisch-optisehen Eigenschaften innerhalb der Epidotgruppe. Chemie der Erde, vol. 11, pp. 525–551. [M.A. 7–364.]Google Scholar
Termier, (P.), 1898. Sur une variété de zoïsite des schistes métamorphiques des Alpes et sur les propriétés optiques de la zoïsite. Bull. Soc. Franç. Min., vol. 21, pp. 148–170.Google Scholar
Termier, (P.), 1900. Sur une association d'épidote et de zoïsite et sur les rapports cristallographiques de ces espèces minérales. Bull. Soc. Franç. Min., vol. 23, pp. 50–64.Google Scholar
Thomas, (H. H.), 1905. On an epidote from Inverness-shire. Min. Mag., vol. 14, pp. 109–114.Google Scholar
Walbauer, (L.) and McCann, (D. C.), 1935. Crystal structure of common zoisite. Amer. Min., vol. 20, pp. 106–111. [M.A. 7–179.]Google Scholar
Weinschenk, (E.), 1896. Ueber Epidot und Zoisit. Zeits. Kryst. Min., vol. 26, pp. 156–177.Google Scholar
Weinschenk, (E.), 1907. Die gesteinbildenen Mineralien. 2nd edit., Freiburg i. Br., p. 131.Google Scholar
Zambonini, (F.), 1920. Sulla clinozoisite di Chiamperuotto in val d'Ala. Boll. Comit. Geol. Italia, vol. 47, pp. 65–99. [M.A. 2–187.]Google Scholar