Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-20T01:43:02.273Z Has data issue: false hasContentIssue false
  • English
  • Français

Granulite facies metamorphosed basic dykes of the Torngat Mountains, Labrador

Published online by Cambridge University Press:  05 July 2018

William C. Morgan  and
Frederick C. Taylor
William C. Morgan
Affiliation:
Geological Survey of Canada, Ottawa, Ontario, Canada
Frederick C. Taylor
Affiliation:
Geological Survey of Canada, Ottawa, Ontario, Canada
Get access Rights & Permissions [Opens in a new window]

Summary

In the Four Peaks region of Labrador Precambrian hornblende granulite facies metamorphosed basic dykes discordantly cross the foliation of garnet-hornblende-pyroxene granulites with sillimanite-garnet-biotite-quartz-feldspar gneiss. Most of the dykes are schistose or banded, but some are massive and undeformed with blastophitic textures. Mineral analyses are given for the equilibrium assemblage in one analysed clinopyroxene-orthopyroxene-amphibole-garnet-plagioclase- quartz blastophitic dyke. Dyke intrusion occurred after formation of the host rock foliation, while the metamorphism was about 1400 Myr ago.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 298 , June 1972 , pp. 666 - 669
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1972

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

Dearnleu, (R.), 1963. Quart. Journ. Geol. Soc. 119, 243-307.CrossRefGoogle Scholar
Dearnleu, (R.), and Dunning, (F.W.), 1968. Ibid. 123, 353-78.Google Scholar
Green, (D.H.) and Ringwood, (A.E.), 1967. Geochimica Acta, 31, 767–833.CrossRefGoogle Scholar
Johannsen, (A.), 1939. A descriptive Petrography of the Igneous Rocks, 1, University of Chicago Press.Google Scholar
Manson, (V.), 1967. Basalts: The Poldervaart Treatise on Rocks of Basaltic Composition, 1, 215.69. eds. Hess, (H.H.) and Poldervaart, (A.), New York (Wiley).Google Scholar
Poldervaart, (A.), 1964 . Bull. Geol. Soc. Amer. 75, 229-32.CrossRefGoogle Scholar
Rickwood, (P.C.), 1968. Contr. Min. Petr. 18, 175-98.10.1007/BF00371808CrossRefGoogle Scholar
Stockwell, (C.H.), 1964 . Geol. Surv. Can. Paper 64-17, Pt. II, 1–26.Google Scholar
Taylor, (F.C.), 1969. Ibid. 68-43.CrossRefGoogle Scholar
Yoder, (H. S., Jr.)and Tilley, (C.E.), 1962. Journ. Petrology, 3, 342.532.10.1093/petrology/3.3.342CrossRefGoogle Scholar