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GOLD AND SILVER.
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MINE PRODUCTION OF GOLD AND SILVER, BY STATES.
ALASKA.
Gold.—The
gold production of Alaska in 1911 was $16,853,256, against $16,126,749
in 1910. The output from siliceous ores was $4,226,687, against
$4,105,459 in 1910, and that from copper ores was $86,569, against
$36,484 in 1910. The production from placers also increased from
$11,984,806 in 1910 to $12,540,000 in 1911.
From
the Pacific coast belt, including southeastern Alaska and Prince
William Sound, the output of gold in 1911 was $4,265,573, against
$4,182,730 in 1910; from the Copper River and Cook Inlet regions,
$313,538, against $351,630; from the Yukon and Kuskokwim basins,
$9,139,145, against $8,062,389; and from Seward Peninsula and
northwestern Alaska, $3,135,000, against $3,530,000. From the first and
third of the above-named geographic divisions there were increases in
output therefore of $82,843 and $1,076,756, respectively, and from the
second and fourth decreases of $38,092 and $395,000, respectively,
giving a net increase for Alaska for the year of $726,507. The
increased gold output of Alaska in 1911 was due mainly to materially
greater placer output from the Innoko-Iditarod region and the Hot
Springs district, and also to much greater output of copper ores. The
gold production from both the Fairbanks and the Seward Peninsula
placers was less than those of 1910.
About
three-fourths of the gold production still comes from the placers, but
the tendency is for the relative output from the deep mines to increase
and for the production from the gravels themselves to be less subject
to fluctuation, owing to the prospect for increased production from
dredges. The auriferous lode mines of southeastern Alaska produced
$3,904,217 in gold in 1911, against $3,839,626 in 1910. The great
Treadwell low-grade gold mines of the Juneau district continued to be
the heaviest producers. In the Copper River region the Bonanza copper
mine was actively developed and made important production. The
Fairbanks camp, in the Yukon basin, continued to lead all other placer
gold districts in Alaska in production, but the output decreased from
$6,100,000 in 1910 to $4,500,000 in 1911. The production of the gravels
of the Hot Springs district in the Yukon is estimated at $785,000 in
1911, a large increase over that of 1910; and the production of the
Innoko-Iditarod region of the Yukon basin increased from $825,000 in
1910 to approximately $3,000,000 in 1911. Seward Peninsula is estimated
to have produced about $3,100,000 in gold in 1911, against $3,530,000
in 1910. Twenty-four dredges in all were operated in Seward Peninsula
in 1911, against 16 rn 1910. Dredging has become of greatly increasing
importance here in recent years.
Silver.—The
production of silver in Alaska was 460,231 fine ounces in 1911, against
157,850 ounces in 1910. Of the total production 320,114 ounces was
obtained from copper ores, 110,288 ounces from placer gold, and the
small remainder from siliceous ores of the lode gold mines.
ARIZONA.
Gold.—The
gold production of Arizona in 1911 was $3,430,503, against $3,149,366
in 1910 and $2,737,500 in 1909. This was the largest gold output of
recent years, and the increase was due largely to
69828°—m r 1911, pt 1------15
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