Show nevada metal meta I 1 yield Y ie id in i n 1913 nevadas mines yielded in 1913 from ores sold or treated in value in gold silver copper lead and zinc according to preliminary estimates of V C heikes of the united states geological survey of this total which is about 5 per cent less than in 1912 the value of copper forms the largest part or 37 per cent that of gold 33 per cent that of silver 25 per cent and the values of lead and zinc each about 2 per cent the mine production of gold decreased about 10 per cent from in 1912 to in 1913 the ores cyanided were the main source of gold which in the form of bullion was shipped chiefly from goldfield tonopah To fairview wonder virginia city manhattan round mountain national and seven troughs an increase estimated at 15 per cent in the nye county production of gold from in 1912 to in 1913 is due to the large tonnage of silver ore treated at tonopah and of gold ores at manhattan the latter according to the closest estimates produced in gold from quartz mines and placers as against in 1912 at the goldfield consolidated mines at goldfield nearly the same tonnage of gold ore was treated at the mill as in 1912 but the average grade was lower according to printed monthly reports report s ore shipments in the district were made from the C 0 D nevada eagle vernal belmont great bend and Diamond field black butte mines aside from goldfield consolidated the most important production came from the jumbo extension mine from which 2000 tons per month were concentrated at the donnie bonnie clare mill thirty eight miles south of goldfield the last half of the year this mill was altered also to cyanide ore from the florence goldfield mine and in october fifty tons per day were being treated in churchill Chur chUl county important gold and silver productions were made by the nevada wonder and nevada hills companies in the searchlight light district of dark clark county much gold ore was cyanided especially at the quartette mine but the plant burned in august production from national and seven troughs was comparatively small first among silver states nevada in 1913 was the leading state in silver production which came mainly from the silver ores at tonopah To the mine production increased to about ounces or about 7 per cent eleven of the tono pah mines produced ounces of silver which was extracted from the ore largely by the cyanide process in 1912 the district yielded ounces of silver the belmont mine followed by the tonopah mining and west end consolidated were the largest producers on the comstock lode in storey county the silver ores yielded about in gold and silver this is slightly less than the output valued at 1 in 1912 the newly opened mines of rochester in humboldt county increased production in 1913 these are essentially silver ores in september tons per day were being shipped by way of oreana a new narrow gauge road to this point being complex com completed e d at virginia city the mexican mill turned turie out much bullion not only from the Alex mexican ican mine but also from the monte cristo mine which was leased the butters plant of the chollar leasing company was active on chollar and potosi ore and the new comstock phoenix mill in six mile canyon was operated an increase estimated at 2 per cent in the mine production of copper form pounds in 1912 to about pounds in 1913 is due to a slight increase in the output of the nevada consolidated and giroux mines from copper porphyries ries at ely and in a larger output of copper matte at the thompson from mason val ley nevada douglas and custom ores S shipments of copper ore were made from the pyramid lake region in washoe county dined transportation reached the district the lead mine output decreased from pounds in 1912 to pounds in 1913 or about 21 per cent this decrease is largely due to the falling off of shipments from the bullionville Bulli onville tailing dump near pioche the yellow pine district in dark clark county had its usual output of about pounds the lead mines in eureka county did not all resume work but the production of lead was greater than for several years the output of recoverable spelter from zinc ores sold or treated increased from pounds in 1912 to pounds in 1913 or about 13 per cent practically all of this output is from the yellow pine district from carbonate ores the yellow pine property and the potosi mine were the largest producers ot of zinc at mcgill and thompson two copper plants at tono operation were in continuous pah seven milling plants using principally tons treated the cyanide process of ores in the manhattan camp four mills operated treating approximately tons of ore all the milling plants on the comstock lode and at silver city were in operation with steady tonnage maintained A new milling pl plant ant constructed iu in 1913 on cedar hill ground of the sierra nevada mine is treating about fifty tons of ore a day A new cyanide plant was nearly completed at aurora to treat gold ores it is equipped with forty stamps and six tube mills the total ore tonnage sold or treated in nevada probably exceeded tons in 1913 against tons in 1912 the new ton cyanide mill for the duckhorn buckhorn mines in eureka county was comple completed ted and operated in 1913 |