Age of zircon from apoharzburgite serpentinite representing mantle of the Uralian paleoocean

Over 60 zircon grains from apoharzburgite serpentinite were dated using SHRIMP–IIe/mc at the Laboratory IBERSIMS of the Granada University (Spain). The apoharzburgite serpentinite represents an oceanic mantle of the Uralian paleoocean, which was exhumed in the crustal structures of the Paleozoic Ural Mobile Belt during obduction. Individual grains span a huge 206Pb/238U age range from 2740 to 250 Ma and are clustered into six discrete age groups...