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GOLD AND SILVER. 857
$1,877,241
in 1912. Crude ores shipped to smelters (mostly copper ores) contained
$1,362,504 in gold, against $1,386,809 in 1912, and concentrates
produced $308,090.
Silver.—The
recoverable production of silver of Arizona in 1913 was 3,948,091 fine
ounces, against 3,490,387 ounces in 1912, and was the record output of
silver to date. Of the total production 2,885,115 ounces came from
copper ores, and of this Cochise County produced 1,568,630 ounces,
mainly from the Warren (Bisbee) district, and Yavapai County supplied
722,894 ounces, mainly from the Verde district. Gila County produced
343,258 ounces of silver from copper ores chiefly from the Globe
district. Dry and siliceous ores produced 392,413 ounces of silver in
Arizona in 1913, and lead ores 498,457 ounces, both chiefly from
Cochise County. Altogether Cochise County yielded 2,127,191 ounces in
1913, against 1,962,644 ounces in 1912, and led among all counties by a
large margin. Yavapai County
y
ielded 854,049
ounces, mainly from copper ores. Bullion recovered from gold and silver
ores, principally by cyanidation, contained 72,899 ounces of silver in
1913, concentrates produced 393,553 ounces, and crude ores shipped
direct to smelters contained 3,403,008 ounces.
CALIFORNIA.
Gold.—The mine production of gold in California in 1913 was $20,406,958, against $19,713,478 in 1912. The output from placers
tend gold-quartz, copper, and lead ores increased in 1913, but there was no recovery reported from zinc ores.
The
deep mines of California yielded $11,570,781 in gold in 1913, of which
$11,222,566 was derived from gold-quartz ores (almost wholly gold
milling), $320,939 from copper ores, and $27,276 from lead ores. The
gold-quartz ores produced $10,771,759 in 1912. The placers supplied
$8,836,177 in 1913, of which $8,090,294 was produced by dredging
(against $7,429,955 in 1912), $329,300 came from hydraulic mines,
$224,045 from surface or sluicing operations, and $192,538 from drift
mines in ancient river channels.
The
dredges produced nearly 40 per cent of the total gold yield in 1913 and
over 91 per cent of the placer output. The total dredge production of
gold in California from 1899 to the end of 1913 has been
$63,505,485,
and during these 15 years the production has steadily increased,
showing small decreases only in 1900, 1907, and 1912. Of
the
three great dredging fields of California, Yuba County decreased its
output in 1913 by $295,742, and Butte County by $149,070, but
Sacramento County increased by $825,806.
The
leading counties in gold production in California in 1913 were Nevada,
with $2,918,733; Amador, with $2,901,898; Sacramento,
Kith $2,503,633; Yuba, with $2,491,505; Butte, with $2,269,849;
Shasta,
with $1,208,870; Calaveras, with $1,175,208; and Sierra, with
$1,006,573. Of those named Yuba, Butte, and Sacramento are
essentially dredging fields, Amador and Calaveras are on the Mother
Lode;
Shasta produces from both siliceous and copper ores; and the production
of Nevada County is chiefly from gold-quartz milling ores of the Grass
Valley district. The five Mother Lode counties—Amador, Calaveras, El
Dorado,
Mariposa, and Tuolumne—whose output is mainly gold-quartz milling
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