The state herald., 1917-01-05
PRODUCTION OF MINES
COLORADO OUTPUT OF GOLD IN
1915 DECREASES.
Larger Output Of silver, Lead, Copper
and Zinc Shown and Values In.
crease Over $e,e34,oo0.

Washtngton.-The mine output Of
gold. silver. copper. lead and xino 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 yield for
the year Of S1S.s40.000 In gold. 7,e20,-
900 ounces Of silver. 70.2oOo0O pounds
Of lead Tin terms Of lead in lead bullion
and lead in leadod-Einc oxide), A600,.
900 pounds Of copper. and 1s0. 900. 900
pounds Of zinc lin terms of spelter
and zinc In zinc oxide). with q total
value Of nearly S4s.oo0.o 900 compared
with t22.4ll.s4 in gold, 7.O27.s72
ounces Of silver. es,s10.5s7 pounds Of
lead. 7.ll3.Ss7 pounds Of copper, and
lo4.b9l.ss4 pounds Of zinc, with total
value Of S4S.l2e.es7 In 1915. This
shows . decrease Of nearly $s.47S,o00
In gold. but increases Of $4,000 ounces
Of silver. 100000 pounds Of lead. L.
$4,000 pounds Of copper. and 35,o0o.-
900 pounds Of zinc. With the increased
average value Of metals the values
show increases Of s1.461.oo0 for silver.
N.S40.00o for lead. 3l.1o3.0 for cop.
per. and e4.s4o.00o for zinc.
The tonnage treated BY the Globe.
Leadvt1ls. Pueblo. Durango and 6alida
snsitsfs was approximately the same
- IN 1915. the ore coming from Cana
d. Colorado. Idaho. South Dakota, and
other state. and including greatly In
creased quantity Of zinc rosidues from
Kansas and Oklahoma zinc shelters.
A notation plant for the treatment Of
Sino-lsad 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.
pany's magnetic wet concentration
mill and smelter at Pueblo were &C.
lively operated on zinclead ores from
Colorado and other Western states.
The Western Zinc Oxide plant at
Lsadvifie was operated steadily. Tho
Western Chemical Company's acid,
magnetic separation. wetconcentra.
tion plant at Denver was operated
steadily at increased capacity. as was
the Empire Zinc Company's 200-ton
magnetic separation plant at Canon
City. both treating chiefly Lcsdville
zinclead sulphide ores. The old Rocky
Mountain smelter at Florence was re-
modelled into plant for the treat
ment Of zinc-lead-copper sulphide ores
A. an intermediate plant for the River
Smelling & Refining Company's elec
trolytic spelter plant at Keokuk. Iowa
a%d large tonnages OF sulphidc ores
,SfSCs received from varioss Colorado
counties. Copper ore, copper matte
and cyanide precipitates were shipped
. the Omaha smelter. and some cop
per and lead ores were shipped Ia
Utah plants.
The gold output OF Cripple Creell
(Teller county, was s1l.S00.000. de
crease OF sI.ss3.o Development con
tinued at lower depths with the con
tinusd gradual lowering OF tho 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 vindicaior company
and the Portland company for the
treatment OF low-grade mine and dump
sro.
The Golden Cycle cyanidation mill
at Colorado City. and the Portland cy-
anidation mills ut Colorado Springs
and Victor. were operated steadily. but
with a decreased output. The yield
from the small cyanide plants In the
Cripple Creek district was not SO large
~ usual.
Lake county. chiefly Lendvillc. but
including also the Lackawanna gulch
Sugar Loaf and st. Kevin lode dis
Brush Bank Burglary suspect Held.