[184] Kemp, J. F.: “The Geological Relation and Distribution of Platinum and Associated Metals”: U. S. Geol. Survey Bull. 193.
[185] Analyses cited by Kemp.
[186] Io3 is abbreviation used for osmiridium.
[187] Analyses cited by Duparc.
GEOGRAPHICAL DISTRIBUTION OF PLATINUM
The relative importance of the platinum-producing countries of the world can best be judged by the past output, which is shown in the following table[188] and graphically in [Figure 22].
[188] Hill, J. M.: “Platinum and Allied Metals”: U. S. Geol. Survey “Mineral Resources, 1916,” Pt. I, 1917, p. 3.
Table 74.—Estimated World’s Production of Crude Platinum, 1909-1917
(Troy ounces)
| 1909 | 1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | |
|---|---|---|---|---|---|---|---|---|---|
| Borneo and Sumatra | 500 | 200 | ... | ... | 300 | ||||
| Canada | 30 | 30 | 30 | 30 | 50 | 30 | 100 | 60 | 80 |
| Colombia | 6,000 | 10,000 | 12,000 | 12,000 | 15,000 | 17,500 | 18,000 | 25,000 | 32,000 |
| New South Wales and Tasmania | 440 | 332 | 470 | 778 | 1,500 | 1,248 | 303 | 222 | |
| Russia | 264,000 | 275,000 | 300,000 | 300,000 | 250,000 | 241,000 | 125,000 | 63,900 | 50,000 |
| United States | 672 | 390 | 628 | 721 | 483 | 570 | 742 | 750 | 605 |
| 271,642 | 285,952 | 313,128 | 313,529 | 267,233 | 260,548 | 143,145 | 89,932 | 82,685 |
