| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.001 | 0.900 | 0.177 | 5.254 |
| Arsenic | As (ppm) | 1.620 | 1.209 | 0.592 | 7.413 |
| Calcium | Ca (wt%) | 0.035 | 0.026 | 0.008 | 0.143 |
| Copper | Cu (ppm) | 1.628 | 0.522 | 1.041 | 3.439 |
| Iron | Fe (wt%) | 0.424 | 0.428 | 0.090 | 2.464 |
| Mercury | Hg (ppm) | 0.018 | 0.005 | 0.011 | 0.039 |
| Magnesium | Mg (wt%) | 0.028 | 0.030 | 0.004 | 0.145 |
| Manganese | Mn (ppm) | 53.060 | 29.383 | 17.886 | 160.758 |
| Sodium | Na (wt%) | 0.024 | 0.029 | 0.003 | 0.163 |
| Phosphorus | P (wt%) | 0.011 | 0.004 | 0.004 | 0.024 |
| Lead | Pb (ppm) | 13.837 | 5.112 | 4.138 | 33.056 |
| Selenium | Se (ppm) | 0.169 | 0.094 | 0.101 | 0.620 |
| Titanium | Ti (wt%) | 0.364 | 0.094 | 0.142 | 0.683 |
| Zinc | Zn (ppm) | 6.790 | 4.426 | 1.578 | 24.453 |