Textures, trace elements, sulfur, lead and He-Ar isotope analyses of pyrite: Implications for ore-forming processes and the origin of the Shenjiayao gold deposit, southern margin of the North China Craton

•Three generation pyrites with distinct textures and geochemistry were recognized.•The dissolution reprecipitation process attributed to part of the gold mineralization, but the largest mass of gold was introduced by new volume of Au-rich ore-forming fluids.•Sulphur, lead and noble gas isotopes of the sulfides indicating a magmatic source for metals.