Zircon U-Pb age of the Shacun gabbro body, Yuexi, Dabie orogen and its geological implications

摘要

The single grain zircon U-Pb age of the Shacun mafic-ultramafic intrusion, Yuexi, North Dabie is (128.1 ± 2.0) Ma. This date indicates that the intrusion was implaced at Yanshanian when Most Mesozoic granitoids were intruded. It was not the syn-collisional intrusion related to the Subduction of the Yangtze Block and ultrahigh-pressure metamorphism at Indosinian.