production
from copper ores was mainly from the Robinson or Ely district, of White
Pine County, and that from placers chiefly from Manhattan and Round
Mountain districts in Nye County.
In
county production of gold Esmeralda led with $11,198,602, against
$11,994,338 in 1910, of which the great Goldfield camp produced
$10,287,075 in 1911 and $11,137,150 in 1910. Nye County followed with
$3,617,276 in gold in 1911, against $3,661,967 in 1910, of which
Tonopah produced $2,366,495 in 1911, against $2,303,702 in 1910.
Humboldt County was third in gold output, with $1,223,714 in gold in
1911, against $1,458,486 in 1910, the chief part of which was from the
National district.
Silver.—The
silver output of Nevada in 1911 was 13,184,601 fine ounces, against
12,479,871 ounces in 1910 and 10,981,061 ounces in 1909. Of the total
production Nye County supplied 10,918,263 ounces in 1911, against
10,550,303 ounces in 1910, mainly from the siliceous silver-gold ores
of Tonopah. Storey County produced 618,006 ounces of silver in 1911,
from the siliceous ores of the Comstock; Churchill County 456,066
ounces, mainly from dry or siliceous ores of Fairview district; and
Humboldt County produced 255,367 ounces, mainly from the National
district.
MARYLAND, NEW HAMPSHIRE, AND PENNSYLVANIA.
Gold and silver.—In
Maryland a small output of copper concentrates from the New London mine
resulted in a nominal production of gold and silver in 1911, figures
for which have been combined with those of Pennsylvania to avoid
disclosing individual output.
There
was no output of gold and silver from copper-pyrite ores of New
Hampshire in 1911, although there was a small production in 1910.
In
Pennsylvania there is annually an interesting but insignificant
production of silver and gold as by-products from refining copper
E
roduced from pyritic
concentrates. These are obtained by separation y the Grondahl process,
from the well-known magnetite iron ores of Cornwall, in Lebanon County.
The output of Maryland and Pennsylvania combined for 1911 was $9 in
gold and 87 fine ounces of silver.
NEW MEXICO.
Gold.—The
gold production of New Mexico was $762,808 in 1911, against $482,424 in
1910. Socorro County alone produced $534,253 in 1911, almost wholly
from the siliceous ores of the Mogollon. Grant County produced $116,284
in 1911, Colfax County $41,407, Lincoln County $31,934, and Sierra
County $27,785. Siliceous ores from the entire State produced over 89
per cent of the total gold output, copper ores (chiefly from Grant
County) about 8 per cent, and placers about 2.5 per cent. Smelters
within the State were idle in 1911, the shipping ore going to El Paso
and Arizona. The notable feature for the year was increased use of
cyanidation for the gold ores of the Mogollon district and elsewhere.
Silver.—The
output of silver in New Mexico in 1911 was 1,354,540 fine ounces,
against 843,987 ounces in 1910. Socorro County alone produced 1,109,945
ounces, or 82 per cent of the total, chiefly from siliceous ores of the
Mogollon district. Grant County supplied 221,882
