Characteristics of Sedimentary Facies of Hydrothermal for Qiantongshan Giant Lead-zinc Ore Deposit,Feng County, Shanxi Province

Key words: 
• sedimentary facies /
• hot fluid /
• basin mixing /
• ore forming fluid

Abstract: Qiantongshan giant lead-zinc ore deposit,Feng County,Shanxi Province occurs at Middle Devonian sedmentaty facies formed by hot fluid. With higher contents of SiO_２、FeO、CaO、MgO、MnO、As、Sb、Cu、Pb、Zn、Ag、B、Ba,five sedmentary-metasomatic, syngenetic-sedimentary subfacies formed by hot fluid and sedimentary subfacies of hot fluid imposed by epigenetic hot fluid.These subfacies were formed by syngenetic sedimentation and metasomatism which were produced by mixing of Ca^２＋－Mg^２＋－K^＋－HCO^－_３－Cl^－type of ore forming fluid with higher contents of Fe²⁺adn Si⁴⁺,Ca^２＋－Mg^２＋－SO^２－－Cl^－（CO_２－CO－H_２O）type of ore-forming fluid with higher contents of Si4+and sea water with higher salinity.Migration mechanism of ore-forming fluid at large-scale were possible caused by the compression produced by the Qinling subplate subducing into the Huabei plate deeply.Ore-forming fluid migrated up along syngenetic fault and moved into basins which were caused by the extension of Earth Crust at surface.So sedimentaty facies of hot fluid occured.