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Further Data on the Petrology of the Pelitic Hornfelses of the Carn Chuinneag–Inchbae Region, Ross-shire, with Special Reference to the Status of Almandine

Published online by Cambridge University Press:  01 May 2009

R. I. Harker
R. I. Harker
Affiliation:
Geochemistry Department, Mineral Sciences Building, State College, Pennsylvania, U.S.A.
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Abstract

The pelitic hornfelses surrounding the Carn Chuinneag–Inchbae complex have, with the other rocks in the area, been subjected to the regional metamorphism which affected the Moine Series as a whole. The minerals of the original hornfelses have reacted to form assemblages which are typical of regional rather than purely thermal metamorphism although the massive structure of the hornfelses is well preserved.

By studying the changes which took place in the hornfelses during the regional metamorphism it has been possible to deduce the most likely mineral assemblages indigenous to the original hornfelses.

The results of the chemical analyses of some of the pelitic hornfelses are presented and chemical data on some of the garnets are given. It is considered unlikely that all the garnets in the hornfelses, which are essentially almandines, formed as a result of the earlier contact metamorphism: some at least probably occur as a result of the later regional metamorphism.

Type
Articles
Information
Geological Magazine , Volume 91 , Issue 6 , December 1954 , pp. 445 - 462
Copyright
Copyright © Cambridge University Press 1954

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References

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