U-Pb geochronology of the Fort Augustus granite gneiss: Constraints on the timing of neoproterozoic and palaeozoic tectonothermal events in the NW highlands of Scotland

Journal of the Geological Society | January 1, 2001| | Copyright

Abstract: The West Highland granite gneiss suite in Inverness-shire, Scotland, represents a series of S-type, anatectic granites formed by partial melting of host Neoproterozoic metasediments of the Moine Supergroup. U-Pb (SHRIMP) dating of zircons from a member of the suite, the Fort Augustus granite gneiss, indicates that the granitic protolith to the gneiss was intruded at 870 30 Ma. This is indistinguishable from the published age determined by the same method for the Ardgour granite gneiss at Glenfinnan, thus supporting the assumption that the various members of the West Highland granite ...

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