Early Mylonitization in the Nevado-Filábride Complex (Betic Cordillera) during the High-Pressure Episode: Petrological, Geochemical and Thermobarometric Data

In the western part of Sierra de los Filabres area, there are fine-grained metamorphic rock bands, showing a field aspect simitar to slates, as previously described in geological literature studied region. They variable thickness, from millimeters tens meters and appear intercalated schist succession. The geochemical resemblance between both types rocks (major, minor trace elements), determined by statistical approach comparison depositional condition indices, points similar sedimentary origin protolith but different clay content. Mineral facies illite “crystallinity” indices so-called slates indicate that they followed same path reached grade than schists. According compositional zoning detected micas garnets present lithologies P-T conditions deduced garnets, mineral nucleation growth episode main paragenesis these schists was more remarkable during high-pressure event, with no significant effect latter low-pressure–high-temperature episode. contrast, coarse-grained developed higher size minerals A differential mylonitization process metamorphism is proposed justify discrepant appearance contrasting response metapelitic event.