| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.394 | 0.254 | 0.805 | 2.132 |
| Arsenic | As (ppm) | 9.134 | 4.650 | 2.317 | 24.703 |
| Calcium | Ca (wt%) | 0.228 | 0.150 | 0.059 | 0.850 |
| Copper | Cu (ppm) | 2.315 | 0.545 | 1.023 | 4.247 |
| Iron | Fe (wt%) | 2.027 | 0.534 | 0.758 | 3.594 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.095 | 0.033 | 0.031 | 0.256 |
| Manganese | Mn (ppm) | 526.244 | 136.982 | 260.692 | 1034.920 |
| Sodium | Na (wt%) | 0.105 | 0.026 | 0.041 | 0.170 |
| Phosphorus | P (wt%) | 0.019 | 0.006 | 0.003 | 0.039 |
| Lead | Pb (ppm) | 19.052 | 2.258 | 10.676 | 24.595 |
| Selenium | Se (ppm) | 0.160 | 0.045 | 0.101 | 0.297 |
| Titanium | Ti (wt%) | 0.555 | 0.118 | 0.218 | 0.930 |
| Zinc | Zn (ppm) | 26.270 | 4.596 | 14.980 | 41.881 |