Show bona n za mining lining day gone t X MINE 1151 TON ISN BODY I 1 4 it V F ASTE C C L cross section of a mine mi ne which seress ss to illustrate why mines must turn to lower grade ore during times of high metal prices if the low grade is left in the mine when better grade ores are mined it will probably remain there forever contrary to the general belief higher metal prices do not mean the return of bona bonanza anza days clays for the metal mining industry the bonanza days are kobie gone as mines operating low grade ores are looking toward the future rather ather than gouging a small high grade pocket tor for a temporary since the tha war production board announced that a premium price 17 cents for copper 11 cents tor for aine and dij cents a pound for lead in excess of quota produced in 1941 many were of the opinion that the mines ot of utah would reap a rich harvest looking at the situ lan w ariot triot icalla the mines have seized the opportunity to produce lower grade ores that were not mi a abl ip fundor the old price ores on which the profit is small or nil they have taken the opportunity to sand in more low grade along with the higher grade under this policy they are serving the nation to the best advantage ta e talons as much ore as possible in the quickest possible way without wit hout regard tor for increasing the net profit moreover this preserves the ic lic of the mine and perpetuates an industry for or the state sate and the nation silver king coalition at park city city immediately expanded the scope of its ts operations to include mere of its lower grade ores and park utah consolidated in the same district immediately reopened the old ontario drain tunnel a portion of the mine which bod bad been closed down tor for years the gintic tintic standard began mining more of its marginal ores others have brought or are bringing low grade units unit into production |