862 MINERAL RESOURCES, 1913—PART I.
silver
tenor, but copper ores, chiefly from this county, supplied a total of
197,574 ounces of silver from New Mexico in 1913. Dry or siliceous
ores, mainly from Socorro County, furnished 1,348,514 ounces from New
Mexico in 1913, against 1,141,786 ounces in 1912. Lead ores produced
68,923 ounces and lead-zinc ores 11,520 ounces in 1913.
OREGON.
Gold.—The
recoverable output of gold from Oregon ores sold from treated in 1913
was $1,627,710, an increase of $857,669 over the production of 1912.
The State therefore more than doubled its gold output in 1913. The
yield is almost wholly from siliceous ore and placer gravels. Baker
County led in gold output, as usual, with a production of $1,373,480,
from both ores and gravels, or an increase of $889,439 over the yield
of 1912. The placer mines of Oregon yielded $450,628 in 1913, against
$189,096 in 1912, the increase being due to success in hedging
operations. From siliceous ores and old tailing's $573,140 was
recovered by amalgamation and $250,952 by cyanidation.
Silver.—The
production of silver in Oregon in 1913 was 179,036 fine ounces, against
57,081 ounces in 1912. The increase was mainly from siliceous ores,
from which Grant County produced 91,588 ounces in 1913 and Baker County
74,907 ounces. Baker County also produced 4,275 ounces from refining of
placer gold bullion.
SOUTH DAKOTA.
The
total value of the production of gold of South Dakota from 1876 to the
end of 1913 is given bv C. W. Henderson, of the United States
Geological Survey, as $177,954,132. The total output of silver for the
same period was 5,656,027 fine ounces, valued at $4,115,991.1
Gold.—The
output of gold from South Dakota mines in 1913 was $7,319,294, a
decrease of $572,076 from the record production of $7,891,370' in 1912.
The present yield of gold in South Dakota is almost wholly from
siliceous milling ores, and the bulk of this is low-grade and treated
both by amalgamation and cyanidation. The great Homestake mines and
mills of Lawrence County were operated continuously and made the bulk
of the output. The ore milled aggregated 1,540,961 short tons, with an
average recovery value of $4,015 per ton, against 1,528,923 tons in
1912, with an average recovery of $4,317 per ton.
Silver.—The
output of silver, derived mainly from refining the gold-mill bullion
produced, was 172,702 fine ounces in 1913, against. 206,460 ounces in
1912.
SOUTHERN APPALACHIAN STATES.
Gold.—The
combined production of gold from the mines of Alabama, Georgia, North
Carolina, South Carolina, Tennessee, and Virginia in 1913 was
$165,733, against $222,496 in 1912. North Carolina again maintained the lead with an output of $126,448, followed bv Georgia and Alabama, with $15,108 and $11,094, respectivelv The production of gold of all three States and of South Carolina has
1 U. S. Oeol. Survey Mineral Resources, 1913, pt. 1, p. 42,1914.
