Zircon geochronology of late Archean komatiitic sills and their felsic country rocks, south-central Zimbabwe: A revised age for the Reliance komatiitic event and its implications

► Komatiitic sills of the Mashaba Ultramafic Suite yield a mean SHRIMP age of 2746 Ma. ► Likely comagmatic, superjacent, komatiitic flow fields are assigned the same age. ► Komatiitic and subsequent basaltic volcanism lasted about 70 Ma. ► Felsic country rocks to the sills yield SHRIMP zircon ages of 2.87-2.80 Ga. ► Platformal to basinal sedimentation directly below the komatiites lasted 50-120 Ma.