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Zircon and muscovite ages, geochemistry, and Nd–Hf isotopes for the Aktyuz metamorphic terrane: Evidence for an Early Ordovician collisional belt in the northern Tianshan of Kyrgyzstan

Northern TianshanEarth ScienceEngineeringGreenstone BeltAktyuz Metamorphic TerraneTectonic EvolutionGeologyGeochemistryMesozoic TectonicsGeochronologyPetrologyNd–hf IsotopesTectonics