| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.026 | 0.512 | 4.264 | 6.045 |
| Arsenic | As (ppm) | 5.387 | 0.612 | 4.500 | 6.400 |
| Calcium | Ca (wt%) | 6.259 | 0.261 | 5.583 | 6.830 |
| Copper | Cu (ppm) | 11.667 | 1.755 | 10.000 | 15.597 |
| Iron | Fe (wt%) | 1.931 | 0.265 | 1.479 | 2.400 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 0.746 | 0.180 | 0.585 | 1.139 |
| Manganese | Mn (ppm) | 340.511 | 85.829 | 240.373 | 570.856 |
| Sodium | Na (wt%) | 1.197 | 0.178 | 0.907 | 1.511 |
| Phosphorus | P (wt%) | 0.048 | 0.010 | 0.040 | 0.074 |
| Lead | Pb (ppm) | 17.355 | 1.765 | 15.052 | 21.815 |
| Selenium | Se (ppm) | 0.156 | 0.074 | 0.100 | 0.300 |
| Titanium | Ti (wt%) | 0.291 | 0.045 | 0.189 | 0.398 |
| Zinc | Zn (ppm) | 47.004 | 9.999 | 39.086 | 67.000 |