The Dolores star. [volume] (Dolores, Montezuma County, Colo.) 1901-current, 1917-01-05
PRODUCTION OF MINES
COLORADO OUTPUT or GOLD IN
1915 DECREASES.
Larger Output q oliver, Lead. ceposr
ed Zine ohewN and Values In
crease ovse So,o3ly 600.

got0. SILVER, copper, lead and StnC 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
Of the Interior. indicates q yield for
the year Of $18,s40.0o0 in gold. $780,
900 ounoas of silver. 10000. 900 pounds
Of lead tn terms of lead In lead bullion
and lead in lsaded-sinc oxide), $780,
900 poundE Of copper. and $50 ,00O, 900
pounds OF zinc Tin terms OF spelter
and zinc In zinc oxide), with 4 total
value Of nearly $4,000. 900 compared
with 327.414.9h in gold. 7.027,972
ounces of silver, 6s,S1o.597 pounds Of
lead. 7.112.537. pounds OF copper. and
1o4.694.ss4 pounds Of zinc. with total
value of 343.426,697 in 1915. This
shows . decrease Of nearly 13.47s. 900
in gold. but increases OF 592, 900 ounces
OF silver. $780, 900 pounds Of lead, l.
$4,000 pounds of copper, and 25.000.-
900 pounds of zinc. With the increased
average value Of metals the values
show increases Of S1.451 900 for silver.
&1,540.0oo for lead. 31.103. 900 for cop
per. and &4.s40,000 for zinc.
The tonnage treated by the Globe.
Leadville. Pueblo, Durango and Salida
shelters was approximately the same
a. in 1915. the ore coming from Cana
da. Colorado. Idaho. South Dakota, and
other state. and including a greatly In
creased quantity Of zinc residues from
Kansas and Oklahoma zinc smelters.
flotation plant for the treatment of
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.
pany's 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-
ton plant at Denver was operated
steadily at increased capacity, as was
the Empire Zinc Company's 2O0-ton
magnetic separation plant at Canon
City. both treating chiefly Leadville
zinc-lead sulphide ores. The old Rocky
Mountain smelter at Florence was re-
ment Of zinc-lead-copper sulphide ores
as an intermediate plant for the River
Smelling & Refining Companys cleo
trolytic. spelter 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
to the Omaha smelter, and some cop
per and lead ores were shipped to
Utah plants.
The gold output Of Cripple Creek
(Teller county, was 81, 800, 900, q de-
crease of 81 ,8S3, 900. Development con-
tinued at lower depths with the con-
tinued gradual lowering Of the water
level as the Roosevelt drainage tunnel
was advanced toward the Vindicator.
Golden Cycle properties. Experiment
tation with the flotation process was
continued by the vindicator company
and the Portland company for the
treatment of low-grade mine and dump
orc.
The Golden Cycle cyanidation mill
at Colorado City, and the Portland cy.
anidation mills at Colorado Springs
and Victor. were operated steadily, but
with decreased output. The yield
from the small cyanide plants in the
Cripple Creek district was not so large
as usual.
Lake county. chiefly Leadville, but
including also the Lackawanna gulch,
Sugar Loaf and st. Kelvin lode dis