Zircon U-Pb geochronology and petrogenesis of metabasites from the western Beihuaiyang zone in the Hong’an orogen, central China: Implications for detachment within subducting continental crust at shallow depths

•The low-grade metabasites in the Dabie orogen formed at ∼750Ma and ∼630Ma.•The metabasites underwent epidoteamphibolite facies metamorphism at ca. 240Ma.•A case study for detachment within the subducted crust at shallow depths.