| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.551 | 0.245 | 0.078 | 1.570 |
| Arsenic | As (ppm) | 1.345 | 0.565 | 0.357 | 3.892 |
| Calcium | Ca (wt%) | 0.458 | 0.564 | 0.033 | 5.255 |
| Copper | Cu (ppm) | 8.603 | 12.210 | 1.072 | 99.736 |
| Iron | Fe (wt%) | 0.346 | 0.188 | 0.072 | 1.839 |
| Mercury | Hg (ppm) | 0.028 | 0.019 | 0.010 | 0.160 |
| Magnesium | Mg (wt%) | 0.032 | 0.043 | 0.004 | 0.511 |
| Manganese | Mn (ppm) | 106.711 | 52.609 | 21.147 | 383.164 |
| Sodium | Na (wt%) | 0.056 | 0.130 | 0.003 | 1.515 |
| Phosphorus | P (wt%) | 0.034 | 0.028 | 0.005 | 0.215 |
| Lead | Pb (ppm) | 29.032 | 42.783 | 7.478 | 674.206 |
| Selenium | Se (ppm) | 0.215 | 0.139 | 0.101 | 1.005 |
| Titanium | Ti (wt%) | 0.438 | 0.102 | 0.218 | 0.985 |
| Zinc | Zn (ppm) | 32.447 | 60.489 | 1.315 | 896.031 |