The Raymer enterprise., 1917-01-04
PRODUCTION OF MINES
COLORADO OUTPUT OF GOLD IN
1915 DECREASES.
Larger Output Of Silver, Lead, Copper
and Zinc Shown and Values In.
crease Over $s,ss4,ooo.


gold. silver. copper. lead and Einc in
Colorado for eleven months of 1916,
and the estimated output for Decem-
ber. according to data compiled by
Charles W. Henderson. of the United
States Geological Survey. Department
f the Interior, indicates yield for
sAs year Of sls.o4o.ooo in gold. 7,e20,-
600 ounces Of silver. fo,2oo, 900 pounds
q isad (in terms Of lead in lead bullion
and lead In leadsd-sine oxids), $780,
eeo pounds Of copper. and 10000, 900
Dsands Of Eino Gin terms Of spsltar
md sine n slas oxids), With = total
value 4 nearly ,4s.eee.oee compared
wxh tis.Al4.sA n gold. 7.oi1.s72
esAsss Of silver. es.sle.Ss1 pounds of
lsaA. 7.lls.ss7 Douads Of copper. and
le<so4.ea4 pounds ef siAc. with total
vaiss Of s<3.Aas.ee7 h 1915. This
shsvs . decrease Of nearly Ss,lfS,oo
h ~, but increases Of $4,000 ounces
4 silver. 100000 pounds Of lead. l..
$4,000 pounds Of copper. and $4,000
900 pounds Of sine. With the increased
average value Of metals the values
show increases Of $l.&sl.O00 for silver.
Sl.s4o.0oo for lead. $l.le3.ooo for cop
per, and s4.s4o.000 for silc.
The tonnage treated by the Globe,
Leadville. Pueblo, Durango and salida
smelters was approximately the same
~ In 1915. the ore coming from Cana.
d. Colorado. Idaho, South Dakota, and
ether state, and including a greatly In
orvass1 quantity Of zinc residues from
Kansas and Oklahoma zinc smslters.
A notation plant for the treatment OF
siaolsad sulphide ores Of the San Juan
region was built and operated at the
Durango smelter during the year. The
copper mating plant at Ouray was
idle. The United States Zinc Com.
panys magnetic wet concentration
mill and smelter at Pueblo were &C
lively operated on zinc-lead ores from
Colorado and other Western states.
The Western Zinc Oxide plant at
Leadville was operated steadily. The
Western Chemical Company's acid,
magnetic separation, wet-concentra-
tion plant at Denver was operated
steadily at increased capacity, as was
the Empire Zinc Company's 2O0-ton
magnetic separation plant at Cafion
City. both treating chiefly Leadville
zinc-lead sulphide ores. The old Rocky
Mountain smelter at Florence was re-
modelled into plant for the treat.
ment Of zinc-lead.copper suiphide ores
az an intermediate plant for the River
Smelling G Refining Company's cleo
trolytic speiter plant at Keokuk, Iowa,
and large tonnages OF sulphide ores
were received from various Colorado
counties. Copper ore. copper matte,
and cyanide precipitates were shipped
10 the Omaha smelter. and some oop.
per and lead ores were shipped to
Utah plants.
The gold output Of Cripple Greek
(Teller county, was $1l,sOO,O00 a de-
crease Of $1,SS3, 900. Development con
tinued at lower depths with the con
tinusd gradual lowering OF the water
level as the Roosevelt drainage tunnel
was advanced toward the vindicator-
Golden Cycle properties. Experimen,
tation with the flotation process was
continued by the vindicator company
and the Portland company for the
treatment Of low-grade mine and dump
ore.
The Golden Cycle oyanidatioA mill
at Colorado City. and the Portland cy-
anidatioa mills at Colorado Springs
and Victor, were operated steadily, but
with a decreased output. The yield
from the small cyanide plants In the
Cripple Greek district was not so large
as usual.
Lake county, chiefly Leadville, but
including also the Lackawanna guloh,
Sugar Loaf and st. Kevin lode dis