Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-25T08:16:55.627Z Has data issue: false hasContentIssue false
  • English
  • Français

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.
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Alderman, A. R., 1935. Almandine from Botallack, Cornwall. Miner. Mag., xxiv, 42–8.Google Scholar
Barth, T. F. W., 1936. Structural and petrologic studies in Dutchess County, New York. Geol. Soc. Amer. Bull., xlvii, 775–846.CrossRefGoogle Scholar
Bosworth, T. O., 1910. Metamorphism round the Ross of Mull granite. Quart. Journ. Geol. Soc., Ixvi, 376–396.CrossRefGoogle Scholar
Eskola, P., 1915. Om sambandet mellan kemisk och mineralogisk samrnansättning hos Orijärvitraktens metamorfa bergarter. Comm. Geol. Finlande. Bull, No. 44.Google Scholar
Folinsbee, R. E., 1941. Optic properties of cordierite in relation to alkalies in the cordierite–beryl structure. Amer. Min., xxvi, 485–500.Google Scholar
Geological Survey of Scotland, 1912. The Geology of Ben Wyvis, Carn Chuinneag, Inchbae, and the surrounding country. Expl. Mem. Sheet 93.Google Scholar
Hall, A. J., 1941. The relation between colour and chemical composition in the biotites. Amer. Min., xxvi, 29–33.Google Scholar
Harker, A., 1932. Metamorphism. Methuen, London.Google Scholar
Klemm, G., 1919. Der granatfels von Gadernheim in Odenwalde und Seine Nebengesteine. Notizblatt. ver. Erdkunde, V Folge, iv, 1.Google Scholar
Preclik, K., 1924. Uber einen almandin-cordierit-hornfels unbekannter Heskunft. Centralblatt f. Min. etc., 652–664.Google Scholar
Read, H. H., 1929. On the occurrence of iron-rich cordierite in Aberdeenshire. Geol. Mag., lxvi, 547–552.CrossRefGoogle Scholar
Schairer, J. F., and Yagi, K., 1952. The system FeO–Al2O3–SiO2. Amer. Journ. Sci., Bowen Volume, 471–512.Google Scholar
Stewart, F. H., 1942. Chemical data on a silica-poor argillaceous hornfels and its constituent minerals. Miner. Mag., xxvi, 260–6.Google Scholar
Tilley, C. E., 1924. Contact metamorphism in the Comrie area of the Perthshire Highlands. Quart. Journ. Geol. Soc., lxxx, 22–70.CrossRefGoogle Scholar
Tilley, C. E., 1926. On garnet in pelitic contact zones. Miner. Mag., xxi, 47–50.Google Scholar
Tilley, C. E., 1935. The rôle of kyanite in the “hornfels zone” of the Cam Chuinneag Granite (Ross-shire). Miner. Mag., xxiv, 92–7.Google Scholar
Tilley, C. E., 1935 a. Metasomatism associated with the greenstone–Jiornfelses of Kenidjack and Botallack, Cornwall. Miner. Mag., xxiv, 181–202.Google Scholar
Wiseman, J. D., 1934. The central and south-west Highland epidiorites: a study in progressive metamorphism. Quart. Journ. Geol. Soc., xc, 354–417.Google Scholar
Wright, W. I., 1938. The composition and occurrence of garnets. Amer. Min., xxiii, 436–449.Google Scholar
Yoder, H. S., 1952. The MgO–Al2O3–SiO2–H2O system and the related metamorphic facies. Amer. Journ. Sci., Bowen Volume, 569–627.Google Scholar