Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-08T07:27:10.256Z Has data issue: false hasContentIssue false
  • English
  • Français

The Micro-fabric of the Moine Schists

Published online by Cambridge University Press:  01 May 2009

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

Extract

Some years ago (Phillips, 1937) I published the results of a preliminary survey of the fabric of some Moine schists by the methods which have been evolved in that branch of the study of rocks now generally known as structural petrology. This survey showed that the quartz, muscovite, and biotite in all the specimens of Moine schist examined have the girdle-arrangement characteristic of a B-tectonic; that the b−axes of these girdles, over a large area of outcrop, plunge in a south-easterly direction; and that the direction of the b−axis of a given specimen is frequently marked by a visible lineation on the foliation-surface of the schist. Study of the fabric of Moine schists visibly affected by the dislocation-phase of the post-Cambrian movements was shown to afford support for the view, already advanced by others on the basis of petrographic study, that the ultimate effect of these movements on the Moine schists is to break down the previously existing fabric; there is a dislocation-metamorphism “undoubtedly superposed upon the general Moine metamorphism” (Read, 1934, p. 307).

Type
Articles
Information
Geological Magazine , Volume 82 , Issue 5 , October 1945 , pp. 205 - 220
Copyright
Copyright © Cambridge University Press 1945

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

Eskola, P., 1939. Die Gefügeregelung, in Die Entstehung der Gesteine, T. Barth, C. W. Correns, P. Eskola. Berlin.Google Scholar
Fellows, R. E., 1945. The influence of grain-selection on the meaning of quartz-diagrams. Trans. Amer. Geophys. Union (1944), 653–9.Google Scholar
Flett, J. S., 1912. in The Geology of Ben Wyvis, Cam Chuinneag, Inchbae, etc. (Explanation of Sheet 93). Mem. Geol. Surv. Scotland.Google Scholar
Hinxman, L. W., 1913. in The Geology of the Fannich Mountains (Explanation of Sheet 92). Mem. Geol. Surv. Scotland.Google Scholar
Horne, J., 1913. in The Geology of Central Ross-shire (Explanation of Sheet 82). Mem. Geol. Surv. Scotland.Google Scholar
Horne, J. and Teall, J. J. H., 1907. in The Geological Structure of the North-West Highlands of Scotland. Mem. Geol. Surv. Gt. Britain.Google Scholar
Ingerson, E., 1936. Fabric Analysis of a Coarsely Crystalline Polymetamorphic Tectonite. Amer. Journ. Sci., 5th ser., xxxi, 161–187.CrossRefGoogle Scholar
Laemmlein, G. G., 1939. On the orientation of quartz crystals in the veins of the Alpine type in the sub-Arctic Urals. Compt. Rend. (Doklady) Acad. Sci. URSS, xxii, 42–4.Google Scholar
Peach, B. N., and Horne, J. 1930. Chapters on the Geology of Scotland, London.Google Scholar
Phillips, F. C., 1937. A fabric study of some Moine schists and associated rocks. Quart. Journ. Geol. Soc., xciii, 581–616.CrossRefGoogle Scholar
Read, H. H., 1931. The Geology of Central Sutherland. Mem. Geol. Surv. Scotland.Google Scholar
Read, H. H. 1934. Age-Problems of the Moine Series of Scotland. Geol. Mag., lxxi, 302–317.CrossRefGoogle Scholar
Sahama, Th. G., 1936. Die Regelung von Quarz und Glimmer in den Gesteinen der Finnisch-Lappländischen Granulitformation. Bull. Comm. Geol. Finlande, no. 113.Google Scholar
Schmidt, W., 1932. Tektonik undVerformungslehre. Berlin.Google Scholar