Geological and Geochemical Characteristics of P and Mn Layering Mineralization of Hougou-Dapingshan Area in Mianxian, Shaanxi Province

Hougou-Dapingshan area,where three manganese(Mn)-phosphor(P) metallogenic belts were discovered recently in Lower Cambrain Tananpo Formation,located in the middle-eastern segment of the South Qinling Mn-P Metallogenic Zone.There were four Mn orebodies and one P orebody in the Ⅱ metallogenic belts.It is often that Mn-P orebodies were separated with a texture of upper Mn seam and lower P seam.The geochemical characteristics of the surface and deep rocks samples of major trace elements from the Ⅱ metallogenic belts were analyzed.The results show that the material source of Mn-Porebodies is similar,but both sediment ary environment including the sediment ary redox conditions,sediment ary area and water body condition is different.These are possible major reasons for Pand Mn separate layering mineralization.