Petrogenesis of Cambro-Ordovician subduction-related granitic magmas of the Québec Appalachians, Canada

In the Québec Appalachians, Cambro-Ordovician subduction-related granitic rocks are found as intrusive bodies (ACI) in the Ascot Complex volcanic arc and as eroded fragments (MGC) in the adjacent Magog Group sedimentary basin. Major- and trace-element geochemistry indicates that ACI and MGC rocks are typical peraluminous granitoids. Both suites are LREE-enriched with minor negative Eu anomalies; ACI granitoids displaying higher MREE and HREE …