Casquet Martín, CésarPankhurst, R.J.Fanning, C.M.Baldo, Edgardo G.Galindo Francisco, María Del CarmenRapela, Carlos W.González Casado, José ManuelDahlquist, Juan A.2023-06-202023-06-2020061342-937X10.1016/j.gr.2005.12.004https://hdl.handle.net/20.500.14352/49545Metamorphism of Grenvillian age (ca. 1.2 Ga; U–Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de Maz). Conditions reached granulite facies (ca. 780 °C and ca. 780 MPa). Comparing geochronological and petrological characteristics with other outcrops of Mesoproterozoic basement, particularly in the northern and central Arequipa-Antofalla craton, we suggest that these regions were part of a single continental crustal block from Mesoproterozoic times, and thus autochthonous or parautochthonous to Gondwana.engjournal articlehttp://www.elsevier.com/locate/gropen access552.4(82)Sierras PampeanasArgentinaMetamorphismU–Pb SHRIMP zircon datingGrenvillePetrología