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The feldspars of the Rosses Granite Complex, Donegal, Ireland

Published online by Cambridge University Press:  14 March 2018

A. Hall
A. Hall*
Affiliation:
Geology Department, King's College, London, W.C. 2
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Summary

An examination has been made of the composition and structural state of the feldspars in each of the units of the Rosses granite complex. The compositions of the plagioclases are systematically related to the compositions of the rocks, but the alkali feldspars are much more uniform as a result of postmagmatic recrystallization. In the granites both alkali feldspar and plagioclase are in low-temperature structural states, but alkali feldspar phenocrysts from one of the porphyry dykes associated with the complex show a higher-temperature state.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 275 , September 1966 , pp. 975 - 982
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1966

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References

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