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The distinction of analcime from leucite in rocks by X-ray methods

Published online by Cambridge University Press:  14 March 2018

F. A. Bannister
F. A. Bannister*
Affiliation:
British Museum of Natural History
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Extract

Since W. Lindgren first detected the presence of microphenocrysts of analcime in basalt, many observers have recorded this mineral as a constituent of igneous rocks, but there is some difficulty in distinguishing between analcime and glass and between analcime and leucite in thin rock-sections. For instance, H. Rosenbusch identified the interstitial colourless isotropic material in monchiquites as glass, whereas L. V. Pirsson showed it to be analcime. H.S. Washington showed that basalts from Sardinia, previously thought to be leueitic, contain phenocrysts of analcime. A. Lacroix also found, in his study of north African basaltic lavas, that in many cases so-called leucite-lavas actually contain analcime and not leucite.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 22 , Issue 132 , March 1931 , pp. 469 - 476
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1931

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References

page 469 note 1 W. Lindgren, Proc. California Acad. Sci., 1890, ser. 2, vol. 3, p. 52.

page 469 note 2 H. Rosenbusch, Mikroskopische Physiographie der massigen Gesteine, 3rd edition, 1896, vol. 2, p. 539.

page 469 note 3 Pirsson, L. V., Journ. Geol. Chicago, 1896, vol. 4, p. 679.Google Scholar

page 469 note 4 Washington, H. S., Journ. Geol. Chicago, 1914, vol. 22, p. 742.CrossRefGoogle Scholar

page 469 note 5 A. Lacroix, Compt. Rend. Acad. Sci. Paris, 1924, vol. 178, pp. 529-535. [Min. Abstr., vol. 2, p. 309.]

page 469 note 6 F. Dixey and W. Campbell Smith, Geol. Mag. London, 1919, vol. 66, p. 256. [Min. Abstr., vol. 4, p. 224.]

page 469 note 7 J. D. MacKenzie, The Crowsnest volcanics. Canada Geol. Survey, Mus. Bull. no. 4, Geol. Ser. no. 20, 1914, p. 27.

page 470 note 1 F. P. Mennell, Geol. Mag. London, 1929, vol. 66, p. 536. [Min. Abstr., vol.4, p. 225.]

page 470 note 2 F. A. Bannister, Abstr. Proc. Geol. Soc. London, 1929-1930, 1930, p. 104.

page 471 note 1 Taylor, W. H., Zeits. Krist., 1930, vol. 74, pp. 1–19.Google Scholar [Min. Abstr., vol. 4, p. 369.]