Manganese Ore Phase and Distribution of Nanhua Datangpo Formation in Datangpo Area,Songtao,East Guizhou

This paper discusses the manganese ore facies and its distribution in Datangpo mine on the basis of substantial detailed drilling catalogs and observations of stratigraphic sections and the Datangpo type manganese researches in recent years.The study of the manganese rock series thickness,the rhodochrosite ore deposit thinckness and the rhodochrosite ore grade reveals that the distribution ore bodies is the same with the long axis of the sedimentary basin,about NE 60 degrees.There are three seepage eruption sedimentary centers,one bigger and the other two smaller.The analysis of the characteristics of the texture and structure of the ore in the center of the basin in Datangpo area suggests that the ore can be divided three phases:the center phase,the transition phase and the edge phase.The center phase is mainly the bubble and massive rhodochrosite along the special structure with a soft sedimentary deformation beddings and is generally multi-mine.The transition phase is mainly banded rhodochrosite with a few massive rhodochrosite,primarily for the single mine.The edge phase is mainly interbedded with the thin banded manganese ore and carbonaceous shale.The phase distribution is controlled by the ancient gas leakage,the location of distribution of the mouth eruption.Substantially coincides with the manganese depocentres.From the center phase to the marginal phases and to the transition phase,the thinckness of the manganese bearing rock series and the ore body and ore grade gradually reduce.The thinckness of the manganese bearing rock series and the ore body and ore grade variation of a positive correlation.