Endogenic metallogenic system and assemblage in the East Qinling,China

According to the sedimentary formations and rock associations in different tectonic evolution stages in the East Qinling,the metallogenic systems and their corresponding metallogenic assemblages may be distinguished as follows :(1)the sedimentary metallogenic system on the active continental margin of the pre-Mesoproterozoic(Changchengian)continental nucleus :Wuyan g Fe metallogenic assemblage and Xiaoqinling Au metallogenic assemblage;(2)the metallogenic system on the Meso -and Neoproterozoic passive continental margin:Xiong'ershan Cu-Pb-Zn metallogenic assemblage,Shendonggou exhalation-sedimentary Mn-Pb metallogenic assemblage and Weimosi Pb-Zn metallogenic assemblage;(3)the metal-logenic system in the transition stage of the early Caledonian tectonic system:Liushanya Cu-Zn metallo-genic assemblage,Weishancheng Au-Ag metallogenic assemblage and Qiushuwan porphyry Cu-Mo metal-logenic assemblage;(4)the metallogenic system on the Paleozoic active continental margin:Gongguan Hg-Sb metallogenic assemblage and Yindongze Ag-Pb and Daxigou siderite-barite metallogenic assemblage;and(5)the metallogenic system in the Mesozoic intracontinental collisional orogenic belt:Mo-W-Pb-Zn-Au-Ag metallogenic assemblage associated with small Yanshanian intermediate-acid intrusions and mod-ified hydrothermal Au-Ag-Pb-Sb metallogenic assemblage.