Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T20:29:05.199Z Has data issue: false hasContentIssue false
  • English
  • Français

The Amphibolite of Doir'a'Chatha (Durcha), Sutherland

Published online by Cambridge University Press:  01 May 2009

G. H. Francis
G. H. Francis
Affiliation:
Department of Mineralogy, British Museum (Natural History), London, S.W. 7.
Get access Rights & Permissions [Opens in a new window]

Abstract

The amphibolite at Durcha passes from a dark, hornblende-rich rock, through every gradation of delicate striping and banding by quartzo-feldspathic material out into psammitic Moine schist, within a few metres. Irregular cross-cutting bands of quartz and feldspar which seem to “ feed ” the delicate stripes can be seen and there are intergrown mixtures of the dark and light components which recall appinites. Chemical and other evidence suggests that the dark rock is a concordant thpleiitic dolerite sill, whilst the macroscopic and microscopic evidence from the pale bands suggests that they are metasomatic in origin and connected with the widespread permeative alkali-injection of the Moine Schists. They seem to have been introduced into the sill along closely-spaced foliation planes parallel with those in the adjacent sediments and with the original contacts of the sill.

Type
Articles
Information
Geological Magazine , Volume 95 , Issue 1 , February 1958 , pp. 25 - 40
Copyright
Copyright © Cambridge University Press 1958

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

Bailey, E. B. et al. , 1924. Tertiary and post-Tertiary geology of Mull, Loch Aline, and Oban. Mem. Geol. Surv. Scotland.Google Scholar
Blatchley, W. S., 1904. The clays and clay industries of Indiana. Indiana Dept. Geol. and Nat. Res. 29th Ann. Rept.Google Scholar
Buddington, A. F., 1952. Chemical Petrology of some metamorphosed Adirondack gabbroic, syenitic, and quartz syenitic rocks. Amer. Journ. Sci., Bowen Vol., Pt. I.Google Scholar
Cheng, Y. C., 1944. The migmatite area around Bettyhill, Sutherland. Quart. Journ. Geol. Soc., xcix, 107–154.Google Scholar
Eskola, P., 1954. A proposal for the presentation of rock analyses in ionic percentage. Ann. Acad. Sci. Fennicae, Ser. A.III, No. 38.Google Scholar
Farquhar, O. C., 1953. From dolerite to diorite: Older Granite activity near Ellon, Aberdeenshire. Geol. Mag., xc, 393–403.CrossRefGoogle Scholar
Hey, M. H., 1954. A new review of the chlorites. Miner. Mag., xxx, 277–292.Google Scholar
Holmes, A., 1918. The basaltic rocks of the Arctic region. Miner. Mag., xviii, 180–223.Google Scholar
Holmes, A., and Reynolds, D. L., 1947. A front of metasomatic metamorphism in the Dalradian of Co. Donegal. Bull. Comm. Géol. Finlande, xx, No. 140, 25–65.Google Scholar
Kennedy, W. Q., 1955. The tectonics of the Morar Anticline and the problem of the north-west Caledonian front. Quart. Journ. Geol. Soc., cx, 357–390.Google Scholar
Lacroix, A., 1912. Sur la constitution minéralogique des volcans de l'ile de la Réunion. Comptes Rendus Acad. Sci., clv, 538–544.Google Scholar
Munthe, H., 1921. Beskrivning till Kartbladet Burgsvik, Jämte Hoburgen och Ytterholmen. Sver. Geol. Unders., Ser. Aa., No. 152.Google Scholar
Noble, J. A., and Harder, J. O., 1948. Stratigraphy and Metamorphism in a part of the Black Hills and the Homestake Mine, Lead, South Dakota. Bull. Geol. Soc. Amer., lix, 941–976.Google Scholar
Nockolds, S. R., and Allen, R., 1953. The geochemistry of some igneous rock series, I. Geochim. et Cosmochim. Acta., iv, 105–142.CrossRefGoogle Scholar
Nockolds, S. R., and Allen, R., 1956. Idem, III. Geochim. et Cosmochim. Acta, ix, 34–77.CrossRefGoogle Scholar
Pantin, H., 1956. The petrology of the Ben Vrackie epidiorites and their contact rocks. Trans. Geol. Soc. Glasgow, xxii, 48–79.CrossRefGoogle Scholar
Patterson, E. M., and Swaine, D. J., 1955. A petrochemical study of Tertiary tholeiitic basalts: the Middle Lavas of the Antrim plateau. Geochim. et Cosmochim. Acta, viii, 173–181.CrossRefGoogle Scholar
Phemister, J., 1936. British Regional Geology: Scotland, The Northern Highlands. Geol. Surv. Gt. Britain..Google Scholar
Read, H. H., 1922. In Summary of Progress for 1921. Mem. Geol. Surv. Gt. Britain.Google Scholar
Read, H. H., 1925. In The Geology of the Country round Golspie, Sutherlandshire. Mem. Geol. Surv. Scotland.Google Scholar
Read, H. H., 1926. In The Geology of Strath Oykell and lower Loch Shin. Mem. Geol. Surv. Scotland.Google 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
Read, H. H., 1956. The last twenty years' work on the Moine Series of Scotland. Kon. Ned. Geol.-Mijnb. Genootschap, xvi, 330–354.Google Scholar
Schmidt, W., 1932. Tektonik und Verformungslehre. Borntraeger, Berlin.CrossRefGoogle Scholar
Stout, W., 1941. Dolomites and limestones of Western Ohio. Bull. Ohio Geol. Surv., xlii.Google Scholar
Turner, F. J., 1948. Mineralogical and Structural Evolution of the Metamorphic Rocks. Geol. Soc. Amer. Mem., xxx..CrossRefGoogle Scholar