Contrasting Archaean crustal records in western part of the Napier Complex, East Antarctica: New constraints from SHRIMP geochronology

► Fyfe Hills and Mt. Cronus reveal Archaean-Proterozoic history. ► No evidence for ancient components older than 3800-3600 Ma. ► 2741 Ma new component for the Archaean magmatism in the Napier Complex.