Metamorphic evolution and P–T path of the Posada Valley amphibolites: new insights on the Variscan high pressure metamorphism in NE Sardinia, Italy

The Posada Valley amphibolites in the inner zone of Variscan Sardinia are characterized by garnet porphyroblasts containing epidote, titanite, quartz, clinopyroxene, amphibole, and plagioclase concentrated core. matrix is made up amphibole fine-grained clinopyroxene plagioclase. recorded an HP stage, a metamorphic re-equilibration, third stage under greenschist facies. P–T conditions I (530–650 °C/0.9–1.3 GPa for core 570–690 °C/1.0–1.4 rim) were obtained pseudosection modelling. 2 (T= 600–700 °C/P= 0.5–0.8 GPa) applying same approach to most retrogressed samples. underwent cooler evolution, with thermal peak lower than that northward eclogites from high-grade complex Sardinia.