Exploration Planning for Sandur Manganese Ores

Three prevailing ore types viz., stratiform, podiform and tabular deposits occur at the incidence ratio of 75:6:19. The stratiform orebodies can be designated as plenemensurate and regular; the podiform types as partimensurate and complicated; and the tabular ones as extramensurate and irregular.

Based on the study presented here, a stratiform body may be explored on 100m × 100m square grid by core-drilling for the results to remain within the confidence level of ±20%; while pediform bodies may be explored with jack hammer-cum-diamond drilling at 50m × 50m square grid and the tabular deposits at 20 m × 20m square grid with deep pits-cum-drilling for the results to remain at the same level of assurance.