Ore-controlling structures of the Qingchengzi Pb-Zn-Au-Ag orefield, northeastern China and significance for deep ore prospecting: Revealed from gravity and magnetic anomalies

•Ore-controlling structures inferred from local gravity and magnetic anomalies.•Local gravity and magnetic anomalies represented in different wavelet orders.•A newly-found concealed fault in the middle probably serves as a magmatic channel.•Mesozoic intrusion detected beneath Paleoproterozoic DDZ granite by forward modeling.•North of Xiaotongjiapuzi deposit proposed for investigating deep-seated ore bodies.