SummaryThe intrusive complex of Monzoni in the western central Dolomites (northern Italy) comprises a suite of pyroxenites, monzogabbros and monzodiorites with solidus temperatures in excess of 1000C which intruded previously unmetamorphosed Permotriassic sediments at less than 5km depth. At the eastern intrusive contact an approximately 860m wide contact aureole is developed in the carbonate country rocks. The prograde sequence of mineral parageneses in a siliceous dolomite of the Cencenighe member and in marly limestones of the Val Badia and Cencenighe members of the Lower Triassic Werfen formation indicate peak metamorphic temperatures in excess of 698C at 185m from the intrusive contact and an outward temperature decrease of approximately 65C per 100m. The high temperatures in the inner aureole caused formation of periclase from the prograde breakdown of dolomite and formation of melilite and esseneite-rich clinopyroxene.