Tectonic Evolution of the Nevado‐Filábride Complex (Sierra de Los Filábres, Southeastern Spain): Insights From New Structural and Geochronological Data

The high-pressure metamorphic Nevado-Filábride Complex (NFC) in the Betics mountain range of southeastern Spain exhibits continental and ocean-derived tectonic units, which are key for understanding geodynamic evolution Western Mediterranean. We address current debate definition emplacement (ultra)mafic rocks, timing burial metamorphism by conducting a structural study combined with single grain fusion 40Ar/39Ar dating white micas structurally critical outcrops eastern Sierra de Los Filábres. One older age population (38–27 Ma) is found at distance from main shear zones relics an early foliation, while younger (22–12 dominant vicinity these zones, where foliation obliterated. Both groups interpreted as record deformation or fluid-induced recrystallization during distinct fabric-forming events, alternative scenarios discussed. A observation presence ophiolitic mélange, which—together new published geochronological data—allows hypothesis. This considers Paleogene subduction beneath Jurassic oceanic lithosphere, followed continued NFC overlying ophiolites below Alpujárride Complex. Exhumation westward slab roll-back led to formation extensional detachment system that obliquely cut nappe contacts. Although constraints high pressure-low temperature (HP-LT) remain inconclusive, hypothesis provides solution can account both Miocene ages HP-LT metamorphism.