We present new 40Ar/39Ar data to assess the retrogression history of Xitieshan eclogite, N. Qaidam.
Amphibolite-facies metamorphism time of eclogite constrained as ~ 425 Ma.
A pressure–temperature–time path was constructed based on our new 40Ar/39Ar data.
The Xitieshan UHP rocks experienced an initial medium-speed exhumation of ~ 4.0 km/Myr.