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GOLD AND SILVER.
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ties,
yielded 32 ner cent. The remainder of the production was from lead,
lead-zinc, and copper-lead ores, mainly from the Central, Cooks Peak,
Victorio, and Magdalena districts.
OREGON.
Gold.—The
mine production of gold from Oregon decreased about 15 per cent, being
$1,270,465 in 1918, against $1,491,798 in 1917. The output in 1916
($1,902,179) was the largest recorded by the Survey for 13 years
preceding 1916. The decrease in 1918 was due to the placer mines, which
yielded only $498,249, or $229,117 less in 1918 than in 1917.
Eighty-nine per cent of the output from deep mines was from siliceous
ores. The deep mines of the State produced $772,216, an increase of
$7,784. The two dredges in Baker County and one dredge in Grant County
produced $387,740, and a few drift mines, hydraulic, and surface
placers in Baker, Jackson, Curry, Douglas, Crook, Josephine, and
Malheur counties produced the remainder of the placer gold. Baker
County, with a yield of $1,009,656, and Grant County with a yield of
$101,981, were the only counties which produced more than $100,000 in
gold.
Silver.—The
mine production of silver in Oregon in 1918 was 107,323 fine ounces—a
decrease of 18,333 ounces. Of the total production 77,031 ounces came
from siliceous ores, 26,161 ounces from copper ores, and 4,102 ounces
from placer bullion.
SOUTH DAKOTA.
The
total value of the production of gold in South Dakota from -876 to the
end of 1918 is given by Charles W. Henderson, of the United States
Geological Survey, as $214,084,159, and the total output of silver for
the same period as 6,593,705 fine ounces.1
Gold.—The
mine production of gold in South Dakota in 1918 was $6,565,337, against
$7,364,233 in 1917. The output was almost wholly from siliceous milling
ores of low grade, of which more than 63 per cent was recovered by
amalgamation and the remainder by cyanidation. The Homestake mines and
mills were operated continuously to October 27, 1918, and at 71 per
cent of capacity for the remainder of the year and produced $5,916,890
in bullion from 1,628,630 tons of ore treated. The Mogul and Trojan
mills were also operated steadily. The small yield of placer gold (21
ounces), came from Lawrence and Pennington counties.
Silver.—The
mine output of silver, derived mainly from refining the gold bullion
produced, was 159,202 fine ounces, or 27,563 ounces less than in 1917.
SOUTHERN APPALACHIAN STATES.
The
total production of gold from 1799 to the end of 1918 in the southern
Appalachian States, as shown from data compiled by the Bureau of the
Mint and the United States Geological Survey, has been $51,020,931. The
figures credit Alabama with $766,336, Georgia with $17,823,769, North
Carolina with $23,628,413, Tennessee with $253,010, Virginia with
$3,296,569, South Carolina with $5,181,429, and Maryland with $71,405.
1 U. S. Gcol. Surrey Mineral Resources, 1918, pt. 1, p. 184,1919.
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