Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by EVANS, C. R.
Right arrow Articles by LAMBERT, R. S. J.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 1974; v. 130; issue.2; p. 125-150;
DOI: 10.1144/gsjgs.130.2.0125
© 1974 Geological Society of London

The Lewisian of Lochinver, Sutherland; the type area for the Inverian metamorphism

CALVIN R. EVANS & RICHARD ST J. LAMBERT

The Lochinver district contains gneisses, pegmatites and dykes generated in five main episodes: (1) pre-2600 m.y, garnet pyroxene granulite facies gneisses with low angle dips, formed in their final state by the Badcallian metamorphism; (2) potash-rich pegmatites of age range 2540 to 2310 m.y.; (3) 2310–2200 m.y. amphibolite facies gneisses occurring in vertical WNW zones, produced by a broadly isochemical metamorphic event; (4) vertical NW-trending dykes emplaced at 2200 m.y. and perhaps down to 1900 m.y. and (5) epidoteamphibolite facies gneisses produced in narrow, discontinuous NW shear zones during the succeeding Laxfordian events. The petrographic and structural features of each sector of the complex are described and new whole rock Rb–Sr ages given for the pegmatite suite, suggesting a maximum age of 2540 m.y. for the suite (plus intrusion of a further suite at 2310 m.y. or recrystallisation of the first suite at 2310 m.y.). Other pegmatite ages confirm the presence of pre-2000 m.y. activity NE of Scourie and at Gruinard. Field and petrographic evidence at Lochinver demonstrates the existence of amphibolite facies metamorphism in post pegmatite pre-dyke times, which produced well-defned rock types and WNW vertical structures, and is defined as the Inverian metamorphic event.




This article has been cited by other articles:


Home page
 Journal of the Geological SocietyHome page
P.D. Kinny, C.R.L. Friend, and G.J. Love
Proposal for a terrane-based nomenclature for the Lewisian Gneiss Complex of NW Scotland
Journal of the Geological Society, 2005; 162: 175 - 186.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society, London, MemoirsHome page
References
Geological Society, London, Memoirs, 2002; 26: 73 - 76.
[PDF]

Home page
 Geological Society, London, MemoirsHome page
References
Geological Society, London, Memoirs, 2002; 24: 119 - 125.
[PDF]

Home page
 Geological Society, London, MemoirsHome page
G. Rogers and R.J. Pankhurst
Unravelling dates through the ages: geochronology of the Scottish metamorphic complexes
Geological Society, London, Memoirs, 1995; 16: 37 - 54.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
T. J. Wynn
Deformation in the mid to lower continental crust: analogues from Proterozoic shear zones in NW Scotland
Geological Society, London, Special Publications, 1995; 95: 225 - 241.
[Abstract] [PDF]

Home page
 Journal of the Geological SocietyHome page
M. LAILEY, A. M. STEIN, and T. J. RESTON
The Outer Hebrides fault: a major Proterozoic structure in NW Britain
Journal of the Geological Society, 1989; 146: 253 - 259.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
J. Tarney and B. L. Weaver
Geochemistry of the Scourian complex: petrogenesis and tectonic models
Geological Society, London, Special Publications, 1987; 27: 45 - 56.
[Abstract] [PDF]