and
the greater part of this is low-grade milling-amalgamation-cya-niding
ore. Mining and metallurgical practice of highest grade have been
characteristic of the successful operation of South Dakota gold mines,
particularly of the great Homestake mines and mills of Lawrence
County, winch produce the bulk of the output. The operation at Mystic,
Pennington County, for nearly half the year, of the first dredge in the
Black Hills, was of special interest in 1911.
Silver.—The
silver production of South Dakota, mainly from refining gold mill
bullion, was 203,755 fine ounces in 1911, against 118,000 ounces in
1910.
TEXAS.
The
gold production of Texas is merely nominal and a by-product, being $21
in 1911, against $423 in 1910. The output of silver in 1911 was 424,394
fine ounces, against 380,322 ounces in 1910. This production is almost
wholly from the milling of oxidized dry or siliceous ores of the
Shafter district in Presidio County.
UTAH.
Gold.—The
gold production of Utah in 1911 was $4,696,998, against $4,032,085 in
1910, and $4,206,548 in 1909. Decreased output was made in Tooele,
Utah, and eight other counties, but this was fully offset by increased
production in Salt Lake and Juab counties. The net increase was due to
larger output of copper ores in Salt Lake County and of siliceous ores
in Juab County. Amalgamation of gold ores was practiced in Beaver,
Boxelder, Garfield, Piute, and Salt Lake counties, and cyanidation in
Tooele (Mercur district), Piute (Gold Mountain district), and Iron
(Gold Springs district) counties. These two processes together produced
$626,609 in gold in 1911, against $754,127 in 1910. The remainder of
the gold output was almost entirely from the smelting of copper, lead,
and dry ores and concentrates, the bulk of the total coming from copper
concentrates. The leading county in gold production in Utah in 1911 was
Salt Lake (chiefly Bingham district) with $2,284,934, and second in
rank was Juab (mainly Tintic) with $1,500,359. Tooele followed with
$584,917, chiefly from the Camp Floyd or Mercur district. The total
placer output of gold in Utah in 1911 was $5,634, from Uinta, Garfield, and San Juan counties.
Silver.—The
silver output of Utah in 1911 was 12,473,787 fine ounces, against
10,466,971 ounces in 1910 and 11,717,172 ounces in 1909. The larger
part of the production was from lead-silver ore produced in Juab, Salt
Lake, Summit, Utah, and Wasatch counties. In county output Juab County
led with 4,673,698 ounces, mainly from dry or siliceous, lead, and
copper ores, chiefly from the Tintic district. Salt Lake ranked second
with 2,947,481 ounces, mainly from copper and lead ores, and chiefly
from the Bingham (West Mountain) district. Third in rank was Summit
County with 2,882,825 ounces, chiefly from lead ores, but also from
lead-zinc and from dry or siliceous ores, mainly from the Park City
region. Utah County ranked fourth, with 934,768 ounces, chiefly from
lead ores of the Tintic district; Wasatch County was fifth with 545,826
ounces, from lead-zinc and lead ores, chiefly from the Park City
region. Of the total silver output of Utah in 1911, produced mainly by
the
