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1 Institut für Mineralogie und Geochemie, Universität zu Köln, Zülpicher Str. 49b, 50674 Köln, Germany
2 Institut für Angewandte Geowissenschaften, Technische Universität Darmstadt, Schnittspahnstr.9, 64287 Darmstadt, Germany
3 Institut für Mineralogie, J.W. Goethe-Universität Frankfurt, Senckenberganlage 28, 60054 Frankfurt, Germany
Correspondence: * E-mail: brenker{at}min.uni-koeln.de
A systematic transmission electron microscopy (TEM) study was performed on the size distribution of antiphase domains in omphacite from eclogites from the Adula/Cima Lunga nappe. The measured mean antiphase domain size is shown to depend on peak temperature, duration of peak metamorphism, cooling rate, and composition. The systematics of the size distribution are modified by dislocation interaction, recrystallization, and the time of growth during the temperature-time-deformation history of the rock. Based on a new model for the size distribution of antiphase domains, we are able to show the potential and limits to estimating time and peak temperature of metamorphism and the subsequent cooling history of this important rock type.
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