| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.813 | 0.637 | 2.375 | 5.722 |
| Arsenic | As (ppm) | 1.363 | 0.300 | 0.391 | 2.229 |
| Calcium | Ca (wt%) | 1.091 | 0.584 | 0.138 | 2.130 |
| Copper | Cu (ppm) | 11.656 | 3.567 | 3.233 | 18.757 |
| Iron | Fe (wt%) | 4.639 | 1.743 | 1.343 | 8.129 |
| Mercury | Hg (ppm) | 0.091 | 0.054 | 0.010 | 0.270 |
| Magnesium | Mg (wt%) | 0.439 | 0.178 | 0.124 | 0.716 |
| Manganese | Mn (ppm) | 1382.680 | 608.350 | 308.107 | 3278.060 |
| Sodium | Na (wt%) | 0.457 | 0.188 | 0.143 | 0.779 |
| Phosphorus | P (wt%) | 0.045 | 0.018 | 0.003 | 0.092 |
| Lead | Pb (ppm) | 22.086 | 5.766 | 6.466 | 32.942 |
| Selenium | Se (ppm) | 0.122 | 0.024 | 0.100 | 0.209 |
| Titanium | Ti (wt%) | 0.829 | 0.164 | 0.400 | 1.344 |
| Zinc | Zn (ppm) | 43.394 | 9.748 | 20.838 | 70.822 |