Lithologic stratum characteristics of the Jiayashan-Beichang profile of the superlarge Jinding Pb-Zn deposit in the Lanping basin，northwestern Yunnan, China

Lithologic stratum characteristics of the Jiayashan-Beichang profile of superlarge Jinding Pb-Zn deposit were described in this article. There are two lithologic series, normal and abnormal sedimentary rock.They consist of separately linen dolomitic limestone、black cryptite、dark brey marl、varicolored muddy argillaceous siltstoue、laterite siltstoue、red gypsum- karst breccia and light grey calcareous sandstone、dark brown limestone-breccia、varicolored collapsed-breccia. Normal sedimentary rock of dark brown limestone-breccia and light grey calcareous sandstone locate the center; abnormal sedimentary rock of linen dolomitic limestone、black cryptite、varicolored muddy argillaceous siltstone、dark brey marl and red gypsum- karst breccia located around it. The main ore types consist of dark brown limestone-breccia and light grey calcareous sandstone, and they are paragenetic relationship spatial. Vertical limestone-breccia located below horizontal calcareous sandstone, and formed typical “mushroom” shape. Lithologic stratum characteristics of the Jiayashan-Beichang profile show muddy diapire mechanism for Jinding Pb-Zn deposit, and it provides new clue to mineral exploration and search for Jinding-type deposite peripheral district.