Abstract
The pelitic mineral assemblages of the metamorphic nappes within the Caledonides of Troms, Norway, suggest that peak metamorphic conditions attained during the Scandian phase of the Caledonian orogeny were of kyanite grade (mid- to upper amphibolite facies). Petrographical studies suggest that all nappes experienced a common tectono-thermal history during this event, but P-T estimates indicate that final re-equilibration temperatures were variable, ranging from 430-490°C/ (?) 6 kbar to 480-580°C/7-9 kbar and 610-680°C/6.2-7.3 kbar. The pressure values obtained are especially sensitive to plagioclase An-content and it is therefore crucial that the grains analysed are part of the equilibrium assemblage. -Authors
Original language | English |
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Pages (from-to) | 385-390 |
Number of pages | 0 |
Journal | Evolution of metamorphic belts |
Volume | 0 |
Issue number | 0 |
Publication status | Published - 1 Jan 1989 |