Identification and isotopic studies of early Cambrian magmatism (El Carancho Igneous Complex) at the boundary between Pampia terrane and the Río de la Plata craton, La Pampa province, Argentina

► We have identified late Early Cambrian calk-alkaline metadiorite and MORB-type metapyroxenite in La Pampa (ECIC). ► The ECIC was derived from a juvenile Tonian source, and was intruded into a juvenile late Mesoproterozoic basement. ► The ECIC is located at the tectonic boundary between the Pampia terrane and the Río de la Plata craton.