You can sink or swim by density alone

A commonly overlooked factor in the resource estimation and eventual mine planning phase during feasibility studies is rock density. Density is most critical in determining the tonnage and contained metal of a resource and therefore translates directly to the financial feasibility of a deposit. In common scientific terms density is defined as mass per unit volume and expressed as g/cc, g/cm3 or t/m3. Tonnage and contained metal are thus calculated by filling a resource model’s volume with density values, interpolated from each sample taken from drill core. Each cubic meter of the resource model will then have an assigned mass and the grade associated with it will give contained metal. From this we see that density estimation is as important as grade estimation. Assumptions regarding density can be as detrimental to a resource model as assumptions regarding grade…

A scale altered to perform the hydrostatic submersion method of density determination. From the Jarman (2011).

A scale altered to perform the hydrostatic submersion method of density determination. From Jarman (2011).

Continue reading