Abstract: Taking the Gaoyan manganese ore in Chengkou county，Chongqing city as the research object，the core logging for No.ZK127-7# drill core is carried out.The revealed strata from the drill core are quaternary sediments，Dengying formation of upper sinian system and Doushantuo formation of lower sinian system from top to bottom.Manganese ore mainly occurs at the top of the Doushantuo formation，and it is strictly controlled by the output of the strata.The manganese ore series are systematically sampled so as to survey the concentrations of Mn，Fe，P，SiO₂，CaO，MgO，Al₂O₃ and LOI.The research shows that，there are great differences among the content of each component，the content distribution form of SiO₂ is similar to that of Al₂O₃ and Fe and opposite to that of MgO，CaO or LOI.The characteristics of consistency and difference of each component are confirmed by the correlation analysis results of different components.The elements ratio value of Mn/Fe，SiO₂/Al₂O₃ and Al/(Al+Fe+Mn) indicated that，the separation phenomenon of Mn and Fe in manganese rock series appears during the mineralization process.Manganese ore layer is formed in a humid environment with hydrothermal injection.

Key words: Gaoyan manganese ore, Manganese rock series, Correlation analysis, Geological and geochemical characteristics