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Minor element chemistry of leucite and pseudoleucite

Published online by Cambridge University Press:  14 March 2018

C. M. B. Henderson
C. M. B. Henderson*
Affiliation:
Geology Department, Imperial College, London, S.W. 7.
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Summary

Leucite and pseudoleucite invariably have lower K/Rb ratios and higher K/Sr and K/Ba ratios than the groundmasses of the rocks in which they occur. The distribution of Rb, Sr, and Ba between K-rich minerals (e.g. alkali feldspars) and the liquids from which they crystallize is generally such that Rb is impoverished and Sr and Ba enriched, relative to K, in the crystallizing phase. Leucite shows the opposite relationship and this is attributed to the leucite structure being sensitive to the size and valency of the ions replacing K.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 272 , December 1965 , pp. 596 - 603
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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