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New sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages from eclogite and associated peridotite near Rongcheng, Sulu terrane, eastern China, indicate that eclogite within peridotite experienced Triassic metamorphism at the same time as the surrounding host gneiss. Cathodoluminescence (CL) images reveal that most of the zircons from two eclogites and one dunite have unzoned, homogeneous or slightly mottled patterns, typical of metamorphic zircons. Some zircons from eclogite sample CJ4C have distinct nonluminescent U-rich cores and luminescent U-poor rims, but similar ages were obtained from both domains. SHRIMP U-Pb zircon analyses of one dunite (MC5A) and two eclogites (CJ4A, 4C) yielded...

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