Show RICHEST COPPER DEPOSIT the romance as well as the scientific and technical aspect pc of metal mining is set forth in a recent publication of tile the geological 6 survey entitled the ore deposits of the jerome and bradshaw mountains in quadrangles arizona the area includes the famous united verde and united verde extension mines as well as many that are smaller and less well known the first discoveries of placer gold in this region were made in 1863 but they did not prove profi profitable tab ae beginning in 1875 many rich gold and silver bearing lodes were found and by 1885 many of these were exhausted although others were productive until 1905 the united verde deposit was worked for silver about 1880 but the value of the copper output soon exceeded that of the silver and it is now the richest deposit of copper ore in the united states since 1900 the dividends paid by this mine have exceeded and although 2500 feet deep it will probably be very productive for many years the united verde extension ore bodies near by discovered in 1915 have been highly productive and to date 3 1 over in dividends has been paid by this mine 11 both mines are in bodies of copper bearing pyrite the production of the mines of this group to date has amounted to about the other metal mines of the area are in simple veins containing gold silver copper lead and zinc minerals some of these have been worked at considerable profit and have been explored to 1000 or 1500 feet below the surface many others have shown steady decline in grade at less depth in some a sharp decline in the yield of gold and silver took place at water level to feet below the surface and it is concluded that the upper zone has been enriched during erosion er tables are given in the report showing the details of annual production of the metals since 1900 for each of the fifteen or more districts in the area described the total value of all metals produced to the end of 1923 is estimated at about |