Across-arc geochemical and Sr–Nd–Hf isotopic variations of mafic intrusive rocks at the southern Central Qilian block, China

The cause of across-arc geochemical and isotopic variations above subduction zone is still controversial. The researches on petrogenesis of arc-type mafic intrusive rocks may give important insights into the cause of the variations. Here we undertakes an integrated study of U–Pb zircon dating, geochemical and Sr–Nd–Hf isotopic compositions for the rear-arc (Keqianyakou and Jinyuan plutons) and arc-front mafic intrusive rocks (Liushendong and...