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The Petrology of the Mt. Alford Ring-Complex, S.E. Queensland

Published online by Cambridge University Press:  01 May 2009

N. C. Stevens
N. C. Stevens
Affiliation:
Department of Geology and Mineralogy, University of Queensland, Brisbane, Australia.
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Abstract

The Mt. Alford ring-complex consists of a central boss of porphyritic microdiorite, granophyre and andesite, with a semicircular zone of rhyolitic and trachytic ring-dykes intrusive into upturned sandstones, and cross-cutting non-arcuate dykes of rhyolite, comendite, trachyte, andesite, phonolite and basalt. The petrology and geochemistry of these rocks are discussed and it is concluded that the various rocks have been produced by differentiation of a basic magma.

Type
Articles
Information
Geological Magazine , Volume 99 , Issue 6 , November 1962 , pp. 501 - 515
Copyright
Copyright © Cambridge University Press 1962

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References

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