| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.499 | 0.477 | 1.240 | 4.238 |
| Arsenic | As (ppm) | 5.879 | 1.568 | 2.094 | 12.141 |
| Calcium | Ca (wt%) | 0.052 | 0.011 | 0.025 | 0.096 |
| Copper | Cu (ppm) | 10.455 | 4.937 | 4.010 | 34.843 |
| Iron | Fe (wt%) | 1.711 | 0.278 | 0.895 | 2.828 |
| Mercury | Hg (ppm) | 0.022 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.137 | 0.027 | 0.063 | 0.220 |
| Manganese | Mn (ppm) | 447.519 | 207.717 | 126.121 | 1307.280 |
| Sodium | Na (wt%) | 0.106 | 0.023 | 0.043 | 0.159 |
| Phosphorus | P (wt%) | 0.025 | 0.006 | 0.011 | 0.048 |
| Lead | Pb (ppm) | 19.949 | 16.119 | 6.661 | 107.542 |
| Selenium | Se (ppm) | 0.266 | 0.086 | 0.108 | 0.532 |
| Titanium | Ti (wt%) | 0.212 | 0.042 | 0.118 | 0.360 |
| Zinc | Zn (ppm) | 42.516 | 6.797 | 25.153 | 65.010 |