Alpine Metamorphism in the Betic Internal Zones

Alpine metamorphism in the Betic Internal Zones was developed with different age and intensity depending on the affected complex. The Malaguide Complex shows mineral parageneses typical of very low metamorphic grade. In the lower Alpujarride Complex, the P–T conditions of metamorphism range between 0.8–1.4 GPa and 350–800 °C and record a HP-LT subduction event at ca. 50 Ma, and a subsequent LP-HT event at ca. 20 Ma that was likely related to the emplacement of the Ronda peridotites. The Nevado-Filabride Complex is characterized by an early HP event (1.8–2.4 GPa at 650–715 °C) followed by an essentially decompressive path. The age of the HP metamorphism, ranging between 17.3 ± 0.4 and 15.0 ± 0.6 Ma, is more recent than in the Alpujarride Complex and took place during subduction of the Nevado-Filabride Complex beneath the Alboran Domain terranes.