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Garronite, a new zeolite, from Ireland and Iceland

Published online by Cambridge University Press:  14 March 2018

G. P. L. Walkee
G. P. L. Walkee*
Affiliation:
Imperial College, London S.W. 7
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Summary

A new zeolite closely related to phillipsite and gismondine is recorded from thirty localities in the Tertiary basalts of Antrim and eastern Iceland, and the name garronite is proposed. Four chemical analyses indicate a composition of NaCa2·5A16Si10O32.13·5H2O. Garronite differs chemically from phillipsite in having a very low content of potash, and from gismondine in containing less lime, alumina, and water; optically garronite is intermediate between these two zeolites.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 258 , September 1962 , pp. 173 - 186
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1962

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References

page 173 note 1 Presented at the University of Leeds in 1955.

page 173 note 2 When the name was first applied, the writer was unaware that D. L. Reynolds had suggested the name garronite (from Slievegarron, Co. Down) for a rock variously described as an augite-biotite-diorite, a hybrid sodi-potassic gabbro, a gabbrodiorite, and a biotite-essexite-gabbro (Geol. Mag. 1937, vol. 74, p. 476 [M.A. 7–35]) This use does not seem to have been accepted. 1 R. M. Barrer, F. W. Bultitude, and I. S. Kerr, Journ. Chem. Soc, 1959, vol. 294, p. 1521.

page 174 note 1 R. M. Barrer, F. W. Bultitude, and I. S. Kerr, Journ. Chem. Soc, 1959, vol. 294, p. 1521.

page 174 note 2 M. Koizumi and R. Roy, Journ. Geol., Chicago, 1960, vol. 68, p. 41.

page 174 note 3 A complete list of localities is given in the appendix.

page 175 note 1 The geology and location of this borehole are discussed by Fowler (Summ. Progr. Geol. Surv. for 1956, 1957), and the general distribution of zeolites by Walker (Min. Mag., 1960, vol. 32, p. 526).

page 175 note 2 This prominent group of feldspar-porphyritic basalt lavas has been mapped over a wide area of eastern Iceland; the group was named from its occurrence at Graenavatn (G. P. L. Walker, Quart. Journ. Geol. Soc, 1959, vol. 114, p. 367).

page 178 note 1 E. S., Larsen, U.S. Geol. Surv. Bull., no. 679, 1921. Also H. W. Jaffe, Amer. Min., 1956, vol. 41, pp. 457–477 Google Scholar.

page 179 note 1 G. P. L., Walker, Min. Mag., 1960, vol. 32, p. 503; and Joum. Geol., 1960, vol. 68, p. 515.Google Scholar

page 183 note 1 G. Bodvarsson and G. Palmason, Exploration of subsurface temperature in Iceland. U.N. Conference on New Sources of Energy. Rome, 1961, p. 21.