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Some Minor Intrusions of Glen Shee, Perthshire

Published online by Cambridge University Press:  01 May 2009

W. O. Williamson
W. O. Williamson
Affiliation:
North Staffordshire Technical College, Stoke-on-Trent
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Summary

Some additional data are given regarding the “newer” intrusions of an area of which the main petrological features have been described elsewhere. The intrusions are:— (1) Aplites, pegmatites, quartz-veins, granodiorite porphyries, and biotite-granodiorites in or around the Newer Diorite. (2) A “porphyry” contaminated by cordieritic hornfels and having “clouded ” plagioclase “phenocrysts ”. Evidence is given that the “phenocrysts” have xenocrystic cores. (3) Quartz-felsites with cordierite, andalusite, and garnet, and granodiorite-porphyries, lying between the Newer Diorite and its roof of Ben Lawers Schist. The granodiorite-porphyries post-date the Diorite but the age of the quartz-felsites is uncertain. Contamination, and mechanical and chemical alteration, of the quartz-felsites are recorded. (4) Newer quartz-felspar-porphyries and lamprophyres, not obviously associated with the Newer Diorite.

Type
Original Articles
Information
Geological Magazine , Volume 73 , Issue 4 , April 1936 , pp. 145 - 157
Copyright
Copyright © Cambridge University Press 1936

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References

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