Show Leaving Low Grade Ore re Becomes Tragedy p I IView View of one of Utah's mills where continued Is kept for ways to enable mines to ship lower grade grado ores All mines con contain c o n t tal a i n various amounts of low grado ore oro a 0 term given to the waste which Is too low grade to ship to the smelter or to mill Some Somo values are there but the operating cost Is too much to permit lermit mining raining Thus the ox extent tent of an ore body or the reserves of a a. mine are determined determined deter deter- mined by operating costs and how much of the low grado grade can be sandwiched sandwiched sand in with the higher er grade or commercial ore Taxes labor costs shipping costs treatment and various varIous various vari varI- ous other and sundry items go tomake to tomake tomake make up the tho extent of a ore body In some come instances It is possible to mine the low lo grade product and store it on the dump in the hope of some somo further condition that will permit its shipment but more moro often oCten it is left in the mine Therefore the higher the cost of operating a n mine the smaller the ore body hody becomes and the smaller the bro ro reserves and the smaller the mining industry Tho The long life lite of the industry In Utah Is evidence c that the mines have to a policy of mining manias as much low grade ore as possible rather than gutting the mine of the high grade for a temporary good showing It becomes a tragedy when low grade ores are left in the ground because it is seldom possible to return and mine this ore Unless tho the low grade is mined with the higher grade the majority will be lost forever and thus much potential poten paten potential Ual wealth is never taken out |