The state herald., 1914-07-24
COLORADOMETAL PRODUCTIONIN 1918
s5,44sssPRooucTloN AND GOLD DE-
CREASED, SILVER COPPER AND INCREASED.
wertern Newspaper Union News Service.

Washington.-The output of Colora
do mines during 1918, according to
Charles w. Henderson Of the United
States Geological Survey, was S1S,146,'
9l6 in gold, 9,325,255 ounces of silver,
S7,620,SG4 pounds of lead; 7,29S,269
pounds of copper, and 119,S46,429
pounds Of zinc Tin terms Of spelter and
zinc in zinc oxide), with a total gross
value of recovered metals of s35,449,-
29S, as compared with $37,320,9G6 in
1912, a decrease in value for 1918 OF
1851 ,G6S, or per cent. There was
a decrease of si11,6i6 in gold, an IN
crease of 1,113.1S5 ounces of silver, an
increase of 12,37S,O97 pounds of lead,
an increase of 1896 pounds of COP
per. and a decrease of 12,S76,3S3
pounds of zinc. The heaviest decrease
in value was S2,4S9,97i for zinc, but
there were increases of $5S2,03l for sill.
yer and s469.394 for lead
The tonnage treated by the Globe,
Leadville, Pueblo, Durango and Salida
smelters from British Columbia, Can
ada, Colorado Idaho, South Dakota,
Utah, and other states, inncluding a
considerable tonnage of zinc residues
from Kansas and Oklahoma zinc smell.
ters, showed n small increase for the
year. An increased tonnage from Col.
orado was shipped to the Garfield,
Midvale. and Murray plants in Utah.
Cya..ide precipitates and ore were
shipped from Colorado to Omaha The
United States Zinc Company's mag.
netic plant and zinc smelter at Pueblo
was operated steadily on zinc-lead
ores from various counties in Colo
rado, and also from Arizona, Idaho
Montana. Nevada. and Utah. The
Western Chemical Company's sui.
phuric acid, magnetic separation. and
wet concentration plant, at Denver
was operated steadily rs was the En-.
pire Zinc Company's magnetic separa.
tion plant, at Canon City, both treat.
ing chiefly Leadville lead-zinc ores.
The Sutton, Steele and Steele dry con.
centration and static electric separa.
tion plant was operated throughout
the year on many tests lots and later
on custom ore purchased from various
districts in tie state.
Cripple Greek produced co per cent
of the total gold yield of the state,
with a yield OF slO.9O5,OOs, as com.
pared with S1l,OOS.3G2 in 1912. The
output for II months from Cripple
Greek seemed to indicate n production
for i2 months OF Sl1.1Si.OOO. but the
severe storm OF December ith so Grip
pied transportation facilities that the
December yield fell off heavily. There
was an increased yield OF gold bullion
from custom cyanldation plants at
Colorado Springs and from the cyan
idaticn mills IN the district, the de.
creased yield being due TO decreased
tonnage OF smelling ore. The Roose.
welt tunnel continued to lower the wa.
ter level gradually. In the vindica.
tor and Golden Cycle mines electric
pumps were installed. Lower levels
were opened in various properties.
The Golden Cycle and Portland cy.
anidation mills at Colorado Springs
wer operated steadily. The Portland,
stratton's Independence. Ajax, and
several other cyanidation plants in
the district were operated continu.
ously. The Standard chlorinatioD and
cyanidation plant at Colorado City
Was IDLE but the Union cyanldation
plant. at Florence. Was opefated part
OF the year on old tailIngs. The pub
lie report OF the Portland company for
1918 shows n total OF i7s.lc2 tons OF
an average assay value OF s2.95 per
ton was treated at the Portland com.
panys Victor mill, with satisfactory
net earnings. The Stratton's Inde.
pendenoe report shows recovery or
iSis per cent on ore averaging 5000
per ton. the cost OF working the mill
being STAG per ton.
Lake county tchieny Leadville, but
for 1878 including the new LAckn.
wanna district. In addition TO Big En-.
riish guleh and Sugar Loaf distric,sl
produced si.oea.Gal IN gold. s.iOO.siS
ounces OF silver (which represents 30
per cent OF the state yield. i.92s.9S7