The metamorphic evolution of the Tjeliken eclogite, occurring within the Seve Nappe Complex of northern Jämtland (Swedish Caledonides), is presented here. The prograde part of the pressure and temperature (P-T) path is inferred from the mineral inclusions (pargasitic amphibole) in garnet and intracrystalline garnet exsolutions in omphacite. Peak metamorphic conditions of 25-26 kbar at 650-700 8C are constrained from geothermobarometry for the peak-pressure assemblage garnet + omphacite + phengite + quartz + rutile, using the garnet-clinopyroxene Fe-Mg exchange thermometer in combination with the net-transfer reaction (6 diopside + 3 muscovite ¼ 3 celadonite +2 grossular + pyrope) geobarometer, the average P-T method of Thermocalc and pseudosection modelling. Quartz inclusions with well-developed radial cracks were identified within omphacite, which suggest that the studied rock could have been buried down to the coesite stability field. Post-peak P-T evolution is inferred from diopside-plagioclase symplectites and amphibole coronas around garnet. Previous studies in northern Jämtland suggest a substantial gap between the P-T conditions of the Lower and Middle Seve nappes: 14-16 kbar and 550-680 8C and 20-30 kbar and 700-800 8C, respectively.
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