贵州水城-纳雍锰矿地质特征

水城-纳雍锰矿是106地质大队于本世纪初在水城一带发现的,皆属表生氧化锰矿床类,锰矿产于中二叠统茅口组第二段。氧化锰矿石仅分布在地表附近,沿倾斜一般向下延伸30-70m即全部变成原始锰矿胚层(含锰、微含锰的硅质灰岩、含硅质灰岩、含钙质硅质岩及石灰岩等)。研究表明,原始锰矿胚层是在茅口晚期黔中台沟相带内形成的富含锰质的热水沉积岩。流体包裹体测定,均一温度为105℃-178℃。锰矿胚层是表生氧化锰成矿的物质基础,本区锰矿是在适当的外因条件影响下,特别是水的作用下,通过矿胚层中杂质元素的淋失作用和锰质相对富集而形成的,是典型的锰帽型矿床。

Geological Characteristics of the Shuicheng-Nayong Mangananese Deposit of Guizhou

During earlier of this century,the geological brigade has found out the Shuicheng-Nayong manganese at vicinity of Shuicheng,which is attributed to the kind of superior oxidized manganese occurring within second member of Maokou Formation of the middle Permian.Oxidized manganese ores are just distributed at surface nearby,and 30~70m declined along the slope turn into primary manganese beds which contain manganese,minor manganese-bearing siliceous limestone,siliceous limestone,carbonaceous silicalite and limestone.The studies indicate that the original manganese protore strata is manganese-rich thermal sediments generating within platform-gully zone.Flow inclusion measured range between 105 and 178 celsius degrees.Manganese is source base in forming superior oxidized manganese,the manganese ore is infected by outer terms,especially by water actions,experienced the generation by leaching dirty out of protore beds and manganese concentration.It is a typical manganese-cap deposit in studing area..