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710 MINERAL RESOURCES, 1916----PART I.
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LEAD ORES.
The
production of gold from refining lead bullion from lead ores sold or
treated in 1916, chiefly from Utah and Colorado, was $1,486,754 against
$1,745,709 in 1915, or 1.63 per cent of the total domestic output of
gold in 1916.
LEAD-ZINC, ZINC, AND OTHER ORES.
The
production of gold from lead-zinc ores was $589,950 in 1916, against
$611,870 in 1915; from zinc ores $171,624 in 1916, against $102,832 in
1915; and from copper-lead and copper-lead-zinc ores $92,039 in 1916,
against $51,603 in 1915.
DISTRIBUTION OF MINE PRODUCTION OF SILVER IN 1916, BY
SOURCES.
The
mine production of silver from the three most important sources of
silver—dry or siliceous ores, copper ores, and lead ores-was 87 per
cent of the total output in 1916. The output from dry and siliceous
ores decreased 4.35 per cent in 1916, following a decrease of 4.5 per
cent in 1915; that from lead ores decreased 3 per cent; that from
lead-zinc ores increased about 2 per cent; and that from copper ores
increased more than 5 per cent. The combined output from placers, zinc
ores, copper-lead, and copper-lead-zinc ores was a little more than 2.4
per cent of the total production of silver.
Mine production of silver in 1916, in fine ounces.®
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