Early Cretaceous Regional-Scale Magmatic-Hydrothermal Metallogenic System at the Southern Margin of the North China Carton
Zhao Xinfu
Li Zhanke
Zhao Shaorui
Bi Shijian
Li Jianwei
Abstract：The southern margin of the North China Craton has a large-scale ore-forming event during the Mesozoic, and includes three major deposit types of lode gold (as either quartz veins or disseminated ores) , porphyry Mo, and quartz vein-type Ag-PbZn deposits.Ore genesis and geodynamic setting for these deposits, however, are still in a matter of debate.Geochronological studies in recent years have revealed that all of these deposits were formed during the Early Cretaceous, and show close spatialtemporal relationship with regional large-scale magmatism.In this study, we make a summary of geological features and regionally spatial-temporal distributioin of the major deposit types, and discuss their probable metal sources and possible genetic links between different deposit types.We suggest that these different types of deposits formed a giant regional magmatichydrothermal metallogenic system.Moreover, the mineralization event at the southern margin of the North China Craton has ages and geological features consistent with those deposits in the neighboring eastern Qinling-Dabie metallogenic belt.They were formed in the same geodynamic setting, which was controlled by the Early Cretaceous large-scale extensional events of the East China.In combination with geophysical data, such an extensional and magmatic event at a lithospheric scale was mostly likely related to the subduction of the Paleo-Pacific Plate underneath the East Asia continent.Upwelling of the magmas and the related hydrothermal fluids were extensively interacted with upper crustal rocks and shallow-derived fluids, and formed a regional scale magmatic-hydrothermal matallogenic system at the priority structures of upper crustal level.
Keywords：southern margin of North China CratonMesozoic metallogenic eventmagmatic-hydrothermal ore-forming systemgeodynamic settingore deposit
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 52-68 )