Petrogenesis of the Kuangshancun and Hongshan intrusive complexes from the Handan–Xingtai district: Implications for iron mineralization associated with Mesozoic magmatism in the North China Craton

•Kuangshancun and Hongshan complexes formed at around 135Ma.•Ore-bearing and ore-barren intrusions display similar geochemical characteristics.•They originated from an enriched mantle source, but experienced distinct magmatic processes.•High oxidation states and water contents could be considered as key factors that led to the iron mineralization.