Geodynamics of decratonization and related magmatism and mineralization in the North China Craton

The North China Craton (NCC) experienced strong destruction (i.e., decratonization) during the Mesozoic, which triggered intensive magmatism, tectonism and thermal events formed large-scale gold other metal deposits in eastern part of craton. However, how decratonization controls formation distribution is not very clear. Based on a large number published data new results, this paper systematically summarizes all for rock assemblages, chronology, geochemistry petrogenesis Mesozoic magmatic rocks, as well mineralizing ages evolution basins NCC. results are used to restore extensional rates Cenozoic strike-slip distance Tanlu Fault, ascertain location Paleo-Pacific plate subduction zones Cenozoic, reconstruct temporal spatial rocks It obtained that magmatism mineralization NCC westward migrate from east west Early Middle Jurassic, but they eastward Cretaceous. metallogenesis these genetically related magmas provided some ore-forming materials fluids generation deposits. geodynamic mechanism proposed, i.e., low-angle slab beneath continental arc with plenty porphyry Cu-Mo-Au similar Andean South America. mantle wedge was metasomatized by fluids/melts derived subducting slab, laying material foundation hydrothermal While rollback gradually increasing angle retreat Cretaceous induced craton extensive