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Ch. 1: Gold and Silver in 1915

Ch. 1: Gold and Silver in 1915 Page of 73 Ch. 1: Gold and Silver in 1915 Text size:minus plus Restore normal size   Mail page  Print this page
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MINERAL RESOURCES, 1915—PART I.
LEAD ORES.
The production of gold from refining lead bullion from lead ores sold or treated in 1915, chiefly from Utah and Colorado, was $1,745,709, against $1,540,348 in 1914, or 1.8 per cent of the total domestic output of gold in each year.
LEAD-ZINC, ZINC, AND OTHER ORES.
The production of gold from lead-zinc ores was $611,870 in 1915, against $360,746 in 1914; from zinc ores $102,832 in 1915, against $39,548 in 1914; and from copper-lead and copper-lead-zinc ores $51,603 in 1915, against $11,323 in 1914.
DISTRIBUTION OF MINE PRODUCTION OF SILVER IN 1915, 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 89 per cent of the total output in both 1914 and 1915. The output from dry and siliceous ores decreased 4.5 per cent in 1915, that from lead ores decreased 0.3 per cent, and that from lead-zinc ores more than 1 per cent, but that from copper ores increased 4.6 per cent. The combined output from placers, zinc ores, copper-lead, and copper-lead-zinc ores, was a little more than 2 per cent of the total produc­tion of silver.
Ch. 1: Gold and Silver in 1915 Page of 73 Ch. 1: Gold and Silver in 1915
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US Geol. Surv. 1915. Gemstones, Metals.
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