Quantcast
  We are temporarily changing parts of Farlang until November 30th and apologize for any inconvenience Portal logo
Login/Register
 
/gemstones/us-geol-survey-1917/page_036 - 2
 

Ch. 1: Gold and Silver in 1917

Ch. 1: Gold and Silver in 1917 Page of 84 Ch. 1: Gold and Silver in 1917 Text size:minus plus Restore normal size   Mail page  Print this page
638
MINERAL RESOURCES, 1917----PART I.
o Includes placer production given in last column.
Nearly all the siliceous ore in three of the largest gold-producing States—Alaska, California, and South Dakota—yields only small val­ues 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. The quantity of siliceous ore treated each year in these States and the average recovery in gold per ton is as follows:
Siliceous ore treated and gold recovered per ton of ore treated in 191J-1917.
The production of gold as a by-product of the smelting of copper ores sold or treated in 1917 was $7,051,523, against $8,286,290 in 1916, a decrease from 9.07 per cent of the total gold yield in 1916 to 8.75 per cent in 1917. The largest production was in Arizona, followed by Utah. Nevada, California, and Montana, in the order given. The
Ch. 1: Gold and Silver in 1917 Page of 84 Ch. 1: Gold and Silver in 1917
Table Of Contents bullet Annotate/ Highlight
US Geol. Surv. 1917. Gemstones, Metals.
Suggested Illustrations
Other Chapters you may find useful
Other Books on this topic
bullet Tag
This Page