The Arvada enterprise., 1913-01-23
METALS IN COLORADO
CHAS. w. HENDERSON COMPLIES
FIGURES ON 1912 PRODUCTION.
Large Increase in Zinc, Lead and Silver
Output, But Decreases in Copper
and Gold.
Western Newspaper Union News Service.

Western Newspaper Union News Service.
Washiugton-The output of Colora-
DO mines for eleven months Of 1912
'nd an estimate for December, accord
ing TO preliminary figures by Charles
w. Henderson, OF the United States
Geological Survey, shows a decrease
Of 100000 for gold, an increase of
100000 ounces for silver, decrease Of
100000 pounds for copper, an in.
crease of 100000 pounds for lead, and
an increase of 100000 pounds for
an increase of 2GOOO,OOO pounds
for zinc. With increased mar
ket prices for silver, copper, and aInc,
the value of the output in 1872 was
over $4,000, 900 greater than in 1911
81, 900 900 in zinc and $1,0OOO0O in sill
yer, the increased value for lead and
copper about balancing the decrease
for gold. The output for 1912 is there.
fore estimated at approximately SIS
100000 in gold, S,OSO,OOO fine ounces Of
silver. 7,O25,OOO pounds of copper, ~
GS0,000 pounds of lead, and l2l ,GO0, 600
pounds of zinc, valued in all at nearly
$50, 100000.
The tonnage treated by the Globe
Leadville, Pueblo, Durango, and Sail
da smCltCrs showed an increase for
the year. ore was also shipped to tn
Murray, Garfield and Midvale plant8
IN, i'm ~
pcX zinc ore and concentrates from
Colorado and other Western states
vas treated at the United States Zinc
Co.'S plant at Pueblo.
The output of Cripple Creek showed
an increase of 100000 in gold. Early
in 1912 the drainage by the Roosevelt
tunnel had lowered the water in many
Of the large properties Except the
Golden Cycle and ViudicatCr mincs),
so than an additional 100 feet in depth
could be worked, and an increased ton
mage was mined during the year.
Despite the closing of the Standard
custom chlorination plant at the end
of the year 1911, leaving in the Gus
tom-millinE field at Colorado Springs
only the Golden Cycle and Portland
mills, the total yield from the gold
mills showed an increase for the year
The Portland plant during 19ll-l2 had
been gradually transformed to 4 cyan
idc mill; thus cyanidatiOn in 1912 had
completely superseded the use of
chlorinatiCn in the treatment Of Grip
pie Creek ores. The Colorado cyanide
plant at Colorado Springs and the I'm.
ion plant at Florence continued opera.
tons on old tailings. The Stratton's
Independence CyanidC-COnCcntTation
mill and the Portland cyanide-cinccu-
tration plant, both at Victor. continued
to treat from 10000 to II 900 tons a
month each of dump and low-grade
mine ore. The Ajax cyanide plant, us
ing the Clancy process, was operated
part Of the year. Several of the small
or cyanide plants in the Cripple Creek
district were operated with an in
creased output from this source. An
increased tonnage Of the highorgrade
ores was shipped direct to smclters.
The tonnage shipped from Lake
county (chiCfly Lcadyille) showed an
increase, with gains in output OF all
the metals except copper. The outpJt
Of zinc was approximately 99,OOOOOO
pounds, representing an increase OF
27O00,0O0 pounds in quantity and s.
COO, 900 in value The output of zinc
carbonate was 900 tons Of approx
imatcly so per cent zinc, against 49,
900 tons of 81 per cent zinc in 1911.
The zinc sulphde shipped decreased
somewhat from the 1876 tons of 23.}
per cent. ore shipped in 1911. How
ever, the Empire Zinc Co.'S magnetic
separation plant Cwi,h an Increased
capacity, at Canon city, and the