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Fluorescent felspar and zircon as petrological aids

Published online by Cambridge University Press:  14 March 2018

Allan F. Wilson
Allan F. Wilson*
Affiliation:
University of Western Australia: formerly of Department of Geology, University of Adelaide, South Australia
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Extract

Although there have been many publications on the fluorescence MX. of minerals in ultra-violet light, very little systematic work has yet been done in utilizing this property for the elucidation of petrological problems, The response of various minerals would seem to be entirely capricious; but the extensive work done on phosphors shows that this depends on the presence of traces of impurities. The spectacular display given by certain minerals has made a strong appeal to amateur collectors.

In 1943 the present writer made use of a fluorescent variety of zircon to assist in the subdivision of the Archaezoic gneisses and igneous rocks of the Mnsgrave Ranges in Central Australia; and after further fieldwork preliminary observations were published in 1947.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 29 , Issue 210 , September 1950 , pp. 225 - 233
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1950

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References

1 H. Haberlandt and A. Köhler, Über die blaue Fluoreszenz yon natfirlichen Silikaten imultraviolettenLicht und über synthetische Versuche an Silikatschmelzen mit eingebautem zweiwertigem Europium. Naturwiss., 1939, vol. 27, p. 275. [M.A. 7-530.] Lumineszenzuntersuchungen an Feldspaten und anderen Mineralien mit seltenen Erden. Chemie der Erde, 1940, vol. 13, pp. 363-386. Die Bedeutung der Fluoreszenz in der Mineralogie und Petrographie. Beiträe zur Fluoreszenzmikroskople (special volume of Mikroskopie), Wien, 1949, pp. 102-118. [M.A. 11-158.]

Foster, W. R., Useful aspects of the fluorescence of accessory-mineral-zircon. Amer. Min., 1948, vol. 33, pp. 724-735. [M.A. 11-158.]Google Scholar

2 A. F. Wilson, The charnockitic and associatecl rocks of north-western South Australia. Part I. The Musgrave Ranges. An introductory account. Trans. Roy. Soc. South Australia, 1947, vol. 71, pp. 195-211. [M.A. 10-438.]

1 An early observation on felspar and granite was by J. Elster and H. Geitel, Ann. Phys. Chem. (Wiedemann), 1891, vol. 44, p. 733. Records for several varieties of felspar have been given by E. Engelharat, lnaug.-Diss. Jena, 1912, and by L. H. BorgstrSm, Bull. Comm. Géol. Finlande, 1936, no. 115, p. 354. [M.A. 6-461.]

1 Fluorescent zircorr appears in all non-pegmatitic and non-aplitic facies of this intrusion, and is apparently not affected by the crystallization conditions to the same degree as is felspar.

1 In the earlier paper (p. 206) it was stated that these rocks contained a nonfluorescont zircon. Under the more intense 2537 A. radiation now in use, the zircon is activated.