The Ordway new era., 1917-01-05
)UCTION or MINES
eADo OUTPUT OF GOLD IN
1915 DECREASES.
Output Of silver, Lead, Copper
Zinc Shown and Values In
crease Over $685., 900.

hington.-The mine output OF
"A liver. copper. lead and zinc in
10 for eleven months of 1916.
1e estimated output for Decem.
ecording to data compiled by
0511o w. Henderson, of the United
4146 Geological Survey, Department
me Interior, indicates a yield for
~ year of $1s,94O.OOO in gold, 7.62O,-
oo0 ounces of silver. 70.20O.OOO pounds
a. lead Tin terms OF lead in lead bullion
and lea in leaded-zinc oxide), S.6O0.-
900 pQunds of copper, and 100000
pouMtI Iof zinc Tin terms of spelter
and, 3 in zinc oxide), with a total
v4 nearly $49,OOO,OOO compared
IN 912. .414.944 in gold. 7.027,972
Of silver, 6S,s1O,597 pounds Of
1,112,537 pounds of copper. and
olsyel.994 pounds of zinc, with total
valre rof $43.426,697 in 1915. This
showsta decrease of nearly $3.475 900
n eDl4, but increases of 900 ounces
oktilver, 100000 pounds of lead, l.
4s7,e00 pounds of copper. and 25.OOO.-
600 pCunds of zinc. With the increased
avetage value Of metals the values
SHOW Increases of $1,451 900 for silver,
e1.S]osO00 for lead, $1.1O3,OOO for cop
pef,t $4.s4O.oOO for zinc.
The tonnage treated by the Globe,
LeAdytlle. Pueblo. Durango and Salida
smelters was approximately the same
- - 1915. the ore coming from Cana
da, Colorado. Idaho. South Dakota, and
nj - 70 i,,o tl,, In,
creased quantity of zinc residues from
Kansas and Oklahoma zinc smelters.
A notation plant for the treatment of
xinoaead sulphide ores of the San Juan
regioM was built and operated at the
Durango smelter during the year. The
coppsr mating plant at Ouray was
Idle. The United States Zinc Com
pan$h magnetic wet concentration
mill md smelter at Pueblo were ac-
lively operated on zinc-lead ores from
CoIos1do and other Western states.
The Western Zinc Oxide plant at
Lea4tille was operated steadily. The
Weeeern Chemical Companys acid,
magnetic separation. wet-concentra-
ton plant at Denver was operated
at1odl}y at increased capacity, as was
~ Jmpire Zinc Company's 2O0-ton
nlagA3tic separation plant at Cafion
CITY 10Th treating chiefly Leadville
1inel4sd sulphide ores. The old Rocky
llounAin smelter at Florence was re-
x1odeled into a plant for the treat
1o6nt of zinc-lead-copper sulphide ores
~ N intermediate plant for the River
1meltlng & Refining Company's elec-
trolyt1c spelter plant at Keokuk, Iowa.
and Arle tonnages Of sulphide ores
veg4 received from various Colorado
cou1t1es. Copper ore, copper matte.
and eEanide precipitates were shipped
~ fh Omaha smelter, and some cop
p4ts6 lead ores were shipped to
sufn Dants.
h6old output of Cripple Creek
county, was $11 100000, a de-
CT pf $1,SS3.OOO. Development con-
t1nS y lower depths with the con-
stin0 radual lowering of the water
levGl the Roosevelt drainage tunnel
wn1S 5Anced toward the Vindicator-
GoldekCycle properties. Experiment
tatl016tth the flotation process was
continG1d by the Vindicator company
and ~ Portland company for the
treat11ent of low-grade mine and dump
TeS aclden Cycle cyanidation mill
ct C&qtAdo City. and the Portland cy-
anides1on mills at Colorado Springs
and etor, were operated steadily, but
wfth decreased output. The yield
froN Ne small cyanide plants in the
CriS Creek district was not SO large
ass1ei.
county, chiefly Leadville, but
11N ng also the Lackawanna gulch,
0ux Loaf and St. Kelvin lode dis