Mesozoic Magmatic and Geodynamic Evolution in the Jiaodong Peninsula, China: Implications for the Gold and Polymetallic Mineralization

The intrusive age ranges of Linglong, Guojialing, Weideshan, and Laoshan granites in the Jiaodong Peninsula are 155–154 Ma, 131–130 118–111 116 respectively. Together with Shidao granite (227–200 Ma), five phases magmatism can be classified by time, all which have different degrees gold polymetallic mineralization. type evolved from A–, S–type to I–, A–type Late Triassic Early Cretaceous, thus reflects evolution geodynamics Mesozoic, indicating switch North China Craton (NCC)–Yangtze (YC) collision subduction Paleo–Pacific Plate (PPP), crustal thickening switching lithospheric thinning a compressional tectonic setting changing an extensional setting. It directly leads series structures evolving demonstrates affinity for extensive mineralization Cretaceous. key markers magmatism, fluid activity structure. Extensive magmatic uplift Cretaceous formed system. During formation process, large proportion crust mantle materials exchanged mixed, interaction was highly active, resulting metallogenic system, provided favorable conditions nonferrous metal hydrothermal deposits. Thus, large-scale explosive occurred middle late