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A Reconsideration of Certain Aspects of the Rangwa and Ruri Carbonatite Complexes in Western Kenya

Published online by Cambridge University Press:  01 May 2009

G. J. H. McCall
G. J. H. McCall
Affiliation:
Dept. of Geology, The University of Western Australia, Nedlands, W., Australia.
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Abstract

Dykes with melilite occur in the area peripheral to the Rangwa complex. A flow-lineated alvikite dyke situated in the area just outside the North Ruri complex contains calcitic pseudomorphs of phenocrysts, and it is suggested that the majority of these are after melilite. The significance of the observed restriction of melilitic dykes to the peripheral area of the complexes is considered in the light of the recognition of a gradational progression from kimberlite-alnöite dykes to beforsite and alvikite dykes at Alnö island and its environs in Sweden. The possibility that cauldron subsidence is involved in some of the Kenya complexes is considered.

Type
Articles
Information
Geological Magazine , Volume 100 , Issue 2 , April 1963 , pp. 181 - 185
Copyright
Copyright © Cambridge University Press 1963

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References

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