Scientific Investigations Report 2007-5039
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007-5039
Table 10. Estimated amounts of contained metal and mineralized rock (metric tons) in placer platinum-group-element deposits in tract PGEP.
[EMINERS index: 81 (Placer PGE-Au 39b). Mean number of deposits = 9.5. Abbreviations: Au, gold; Pt, platinum; Pd, palladium; Ir, iridium; Os, Osmium]
| Quantile | Au | Pt | Pd | Ir | Os | Rock |
|---|---|---|---|---|---|---|
| 0.95 | 0 | 0 | 0 | 0 | 0 | 89,000 |
| 0.90 | 0 | 1 | 0 | 0 | 0 | 390,000 |
| 0.50 | 0.01 | 5 | 0 | 0 | 0.04 | 5,000,000 |
| 0.10 | 0.13 | 17 | 0.05 | 0.1 | 0.3 | 15,000,000 |
| 0.05 | 0.20 | 21 | 0.1 | 0.2 | 0.5 | 18,000,000 |
| Mean | 0.04 | 7 | 0.02 | 0.04 | 0.1 | 6,500,000 |
| Probability of mean | 0.24 | 0.40 | 0.24 | 0.27 | 0.29 | 0.41 |
| Probability of zero | 0.16 | 0.03 | 0.31 | 0.37 | 0.18 | 0.03 |
U.S.
Department of the Interior | U.S. Geological
Survey
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