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Show UTAH MI1S PRODUCE E0O0 ZIHC ODES Important Deposits of This Great Metal Are Found in Several Counties. Zinc is marketed mainly as spelter, though some ore ia converted directly " to oxide. The principal countries producing pro-ducing spelter aro Germany, the United States and Belgium. Great Britain, France and Holland produce smaller but still important quantities. Zinc ores come most largely from Germany and the United States, though there is an important production from Spain; Italy and Australia, and a small production pro-duction from France, Sweden. Algeria, Great Britain and other countries. The most important changes in the oro situation sit-uation in recent years have been the rapid growth of production in the United' States and Australia, and the stationary or declining output of European Eu-ropean countries. Australia is becoming becom-ing a principal prodncer. Mexico and Canada are now" regularly shipping ore, the former in considerable quantities. Canada, has also become a smelting country, and is likely in the future to ship metal rather than ore, say3 the Mining "World. In the United States the zinc ore production is from three regions: (1) The Eastern States, (2) the Mississippi valley, (3) the Rocky Mountain region. In tho Eastern States, 'however, a very considerable quantity of ore is burned to form oxide, and a certain portion is exported. In the Mississippi valley oxide ox-ide is also made; occasionally a 'little ore is exported; and, of recent years, a great deal of Rocky Mountain ore is smelted. In the Rocky Mountain States some ore is made into oxide and a little is reduced to spelter, but the bulk is shipped either to the Mississippi valley or to Europe. The zinc production of Utah at present pres-ent comes largely from Park City and Frisco. At the former camp the Daly West is the main producer, and at Frisco Fris-co the Horn Silver. The ores from Park City are retreated nt 8alt Lako City by the Western Ore Separating com- Sany, and yield a concentrate running 6 to -12 per cent in zinc. Tho mine is described by J. M. Boutwell. A number num-ber of other mines in this district contain con-tain important quantities of zinc ore, and may bo expected in time to become producers. The Horn Silver mine at Frisco, which has been an important producer of silver and lead or many years, is now shipping zinc regularly. The ore body has been described by S. F. Emmons Em-mons as occurring "along a faulting fissure at the contact of an altered igneous ig-neous rock and a dolomite of uncertain age and near a mass of monzonite. Tho limestone where in contact with the monzonite has been subjected to contact con-tact metamorphism. ' ' The workings extend to a depth of 1600 feet; and to a distance of a half mile or. more along the strike of the vein. The working face where seen between the 500-foot and the 900-foot levels is 15 to 25 feet wide, and shows zinc blende, galena, and pyrite cementing and replacing crushed masses of the- country rocks. The ore is sufficiently high in zinc to be shipped without concentration, and about rj.uuu tons nas been shipped The range in composition is about as follows: Composition of Horn Silver mine, zinc ore, Utah: Zinc per cent 34 to 42 Iron per cent 1 to 3 Lead per cent 5 to 14 Silica per cent 20 to 22 Silver ounces 2 to 12 Gold ounces 0.03 The ore is a peculiar brown to red color, and consists mainly of sulphide, but is said to be in part also sulphate. It ha? the little understood property of 1 ' triboluminescence ' becoming luminous lum-inous when scratched with steel. |
