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Syntexis and Differentiation

Published online by Cambridge University Press:  01 May 2009

Alfred Brammall
Alfred Brammall
Affiliation:
Imperial College of Science.
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Extract

PETROGENIC problems concern the processes and effects of adding to magma, or subtracting from it, rock-forming substance in general. Increment or loss of silica alone entails relatively simple mineralogical consequences. The more intricate problems concern the addition of associated material (notably alumina, the Ro-oxides, alkalies, and fluxes) in varying relative proportions, and at any stage in the evolution of rest-magma. These additions tend either to promote, counter, or otherwise modify the prevailing trend of differentiation in magma thus augmented.

Type
Original Articles
Information
Geological Magazine , Volume 70 , Issue 3 , March 1933 , pp. 97 - 107
Copyright
Copyright © Cambridge University Press 1933

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