Petrogenesis and tectonic setting of ore-related porphyry in the Duobaoshan Cu deposit within the eastern Central Asian Orogenic Belt, Heilongjiang Province, NE China

•The ore-related porphyry shows a mantle source with depleted Sr, Nd, Hf, and O isotopic features.•The Duobaoshan granitoids are derived from melting of a thickened juvenile mafic lower crust.•The Duobaoshan deposit was formed in a subduction-related arc setting.