Abstract

Retrograde eclogite is found along the northern perimeter of ultramafic rocks in the Mont Albert complex, Gaspé, Quebec. Garnet–clinopyroxene geothermometry gives 840 °C as the peak temperature of metamorphism. Kyanite in associated metapelites requires that, at this temperature, pressure be a minimum of 12 kbar. Based on symplectic textures in the eclogitic and associated rocks and clinozoisite – white mica – quartz– plagioclase equilibria, a counterwise pressure–temperature trajectory that terminates near 500 °C and 8 kbar can be traced for the Mont Albert complex.

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