Hostname: page-component-7479d7b7d-rvbq7 Total loading time: 0 Render date: 2024-07-11T16:22:05.953Z Has data issue: false hasContentIssue false
  • English
  • Français

The Structure of the Grantown Granite Complex, Morayshire

Published online by Cambridge University Press:  01 May 2009

David H. Mackenzie
David H. Mackenzie
Affiliation:
Geological Survey Department, New England, Freetown. Sierra Leone.
Get access Rights & Permissions [Opens in a new window]

Abstract

The field relations and petrography of the Grantown Newer Granite are described. The structure of the country rocks—Moine gneisses—is compared with that of the numerous blocks included in the granite, the results being synoptically presented. The blocks originally bore the same orientation as the country rocks and have been rotated in the granite during its emplacement. From east to west three zones of orientation, showing increasing rotation of blocks from their original position, are recognized in the granite. As the granite lacks an internal penetrative structure the kinematics of the blocks in the granite remains uncertain. All the evidence suggests that the granite did not form in situ, but was emplaced in a plastic state by dilation of the country rocks mainly along their foliation.

Type
Articles
Information
Geological Magazine , Volume 95 , Issue 1 , February 1958 , pp. 57 - 70
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

Cogné, J., 1950. Observations au sujet d'enclaves déplacées dans un granite prés de St. Nazaire (Loire-Inferieure). Acad. sci. Paris, Comptes Rendus, ccxxxi, 1076–8.Google Scholar
Hinxman, L. W., and Anderson, E. M., 1915. The geology of Mid-Strathspey and Strathdearn. Mem. Geol. Survey.Google Scholar
Horne, J., 1923. The geology of the Lower Findhorn and Lower Strath-nairn. Mem. Geol. Survey.Google Scholar
Leedal, G. P., 1952. The Cluanie igneous intrusion, Inverness-shire and Ross-shire. Quart. Journ. Geol. Soc., cviii, 35–63.CrossRefGoogle Scholar
Lelubre, M., 1938. Contribution a l'étude du granite de Primel (Finistere). Bull. Soc. géol. France, ser. 5. viii, 673–688.Google Scholar
Mackenzie, D. H., 1957. On the relationship between migmatization and structure in Mid-Strathspey. Geol. Mag., xciv, 177–186.CrossRefGoogle Scholar
Mcintyre, D. B., 1951. The tectonics of the area between Grantown and Tomintoul (Mid-Strathspey). Quart. Journ. Geol. Soc., cvii, 1–22.CrossRefGoogle Scholar
Perrin, R., 1954. Granitization, metamorphism, and volcanism. Amer. Journ. Sci., cclii, 449–465.CrossRefGoogle Scholar
Perrin, R., 1956. Granite again. Amer. Journ. Sci., ccliv, 1–18.CrossRefGoogle Scholar
Perrin, R., and Roubault, M., 1952. Observations en Bretagne sur des granites à enclaves de schistosités discordantes, dites enclaves déplacées. Acad. sci. Paris, Comptes Rendus, ccxxxv, 196–8.Google Scholar
Pitcher, W. S., 1952. The migmatitic older granodiorite of Thorr District, Co. Donegal. Quart. Journ. Geol. Soc., cviii, 413–446.CrossRefGoogle Scholar
Ramberg, H., 1952. The origin of metamorphic and metasomatic rocks. Chicago.Google Scholar