The
silver production of Utah was 10,466,971 fine ounces in 1910, giving
the State third rank in the United States. Juab County produced
3,835,063 ounces, of which 2,634,361 ounces came from lead ore, 829,994
ounces from copper ore, and 370,026 ounces from dry or siliceous ores,
chiefly from the Tintic district. Summit and Wasatch counties together
(Park City region) produced 2,571,771 ounces, of which 1,513,444 ounces
came from lead ores and 989,135 ounces from lead-zinc ores. Third in
rank was Salt Lake County, with 2,006,131 ounces, of which 1,186,072
ounces came from copper ores, 361,104 ounces from lead ores, 239,263
ounces from lead-zinc ores, and 126,893 ounces from copper-lead ores,
mainly from Bingham district, but also in part from the Big and Little
Cottonwood districts. Utah County ranked fourth with 1,514,384 ounces
from lead ores of the Tintic district. Of the total silver output of
Utah in 1910 lead ores produced 6,423,523 ounces, copper ores 2,036,909
ounces, and lead-zinc ores 1,228,398 ounces.
Washington.—The
gold production of Washington in 1910 was $788,145, an increase over
that of 1909 of $426,094, or nearly 116 per cent; and it was the
largest output in the last seven years. Fern' County, in which is the
important Republic district, again led in production with $714,808,
followed by Stevens with $30,182. The siliceous ores, mainly from
these counties, yielded the bulk of the output, the placer production,
mainly from Kittitas County, being very small. The output of gold from
the Republic district was $713,604 in 1910, against $209,114 in 1909,
mainly from siliceous smelting ore.
The
silver production was 205,345 fine ounces in 1910, an increase of
125,857 ounces over the output of 1909. The production was mainly from
siliceous smelting ores of Ferry County and from siliceous copper and
lead smelting ores in Stevens County.
Wyoming.—The
production of gold in Wyoming in 1910 was $3,199, against an output of
$4,086 in 1910. Of the total gold production, $1,674 came from
siliceous ores, $871 from copper ores, and $654 from placers in 1910.
The silver production, mainly from copper ores, decreased from 1,754 fine ounces in 1909 to 1,478 ounces in 1910.
Philippine Islands.1—The
gold production of the Philippines in 1910 was $154,430, an apparent
decrease of $93,167 from the output of 1909. The silver production,
merely that of recovery in refining the gold produced, is estimated at
1,800 fine ounces for 1910. Of the three chief mining districts of the
Philippines the most important at present, and the youngest, is that
of Baguio, in the mountains of the sub-province of Benguet in central
Luzon.2 According to Eddingfield3 the majority of
the deposits are fissure veins in andesite, although contact deposits
between andesite and limestone and between andesite and diorite have
been reported. The veins occur in groups, and about 250 have been
uncovered. The general strike is east, parallel with the mountain
trend, and the width varies from 1 to 18 feet. The gangue varies
greatly, including white quartz, banded crystalline quartz, calcite,
rhodocrosite, brown manganese oxide, brecciated
i
Advance figures for the output of the Philippines in 1910 have been
kindly furnished by the Governor General by cable through the Bureau of
Insular Affairs, War Department.
2 Ferguson, H. G., The gold deposits of the Philippine Islands: Econ. Geology, vol. 6, No. 2, March, 1911, p. 115.
8
Eddingfield, F. D., The Baguio mineral district: Mineral Resources of
the Philippine Islands, Bureau of Science, Manila, 1910, pp. 14-17.
