Sedimentary facies and palaeogeography during the Early Sinian and potential of the rhodochrosite deposits in northeastern Guizhou and its adjacent areas

The Lower Sinian strata in northeastern Guizhou and its adjacent areas are redivided according to the high-resolution sequence stratigraphy with the aid of the theories and techniques of sequence stratigraphy and event stratigraphy, referenced to the pre-existing geological results on the new types of rhodochrosite deposits in these areas. The sedimentary facies and palaeogeographic map is reconstructed and associated sedimentary facies model is presented. The sedimentary environments of the rhodochrosite deposits of varying sizes and manganese-impounding basins are delineated for the study areas.