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Ch. 1: Gold and Silver in 1920

Ch. 1: Gold and Silver in 1920 Page of 57 Ch. 1: Gold and Silver in 1920 Text size:minus plus Restore normal size   Mail page  Print this page
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MINERAL RESOURCES, 1920—PART I.
Gold produced in six Western States in 1916-1920—Continued.
Nearly all the siliceous ore in three of the largest gold-producing States—Alaska, California, and South Dakota—yields only small value in silver and is classed as gold ore. The siliceous ores from Colorado include some silver and gold-silver ores, but the great bulk of the siliceous ore is purely gold ore.
Siliceous ore treated and gold recovered per ton of ore treated in 1913-1920.
Ch. 1: Gold and Silver in 1920 Page of 57 Ch. 1: Gold and Silver in 1920
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US Geol. Surv. 1920. Gemstones, Metals.
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