Late Jurassic magmatism and associated Au–Cu polymetallic mineralization in the North China Craton: Constraints from U–Pb–Hf–Sr–Nd isotopes of the Xiayingfang intermediate-felsic igneous rocks

•Xiayingfang porphyries were originated from partial melting of sedimentary rocks.•Xiayingfang diorite were derived from partial melting of SCLM.•Xiayingfang diorite evolved to adakite-like through amphibole fractionation.•Diorite may have been the Au–Cu ore-causative intrusion at Xiayingfang.