摘要
In this paper,F1plow normal fault of Xixibao manganese fault is taken as example,by analysis the lithology,structure and mineral material of stratum cut cross by F1fault,the character,formation condition and genesis of F1plow normal fault are discussed. It’s thought the formation of this fault is because the porosity fluid pressure product when the montmorillonite in overpressure manganese- bearing carbonaceous shale transform into illite caused the load intensity decrease of overlying strata when the fault cross the upper brittle and relative brittle sedimentary strata and enter the first black manganese- bearing series of Datangpo formation,it made the fault dip angle gentle and the stratum slippage. By analysis the F1fault,it’s thought the plow normal fault developed widely in Datangpo- type manganese area in east Guizhou and the nearby area.Therefore,the character study of plow fault will be helpful for Datangpo- type manganese prospecting in east Guizhou and the nearby area.