| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.354 | 0.857 | 2.768 | 6.717 |
| Arsenic | As (ppm) | 12.096 | 4.365 | 6.779 | 23.082 |
| Calcium | Ca (wt%) | 0.109 | 0.025 | 0.069 | 0.183 |
| Copper | Cu (ppm) | 10.355 | 2.568 | 6.027 | 17.479 |
| Iron | Fe (wt%) | 3.442 | 0.759 | 1.857 | 5.968 |
| Mercury | Hg (ppm) | 0.035 | 0.023 | 0.020 | 0.287 |
| Magnesium | Mg (wt%) | 0.258 | 0.055 | 0.135 | 0.414 |
| Manganese | Mn (ppm) | 1194.080 | 398.050 | 456.885 | 2338.520 |
| Sodium | Na (wt%) | 0.144 | 0.049 | 0.084 | 0.251 |
| Phosphorus | P (wt%) | 0.049 | 0.009 | 0.030 | 0.071 |
| Lead | Pb (ppm) | 23.494 | 5.612 | 15.354 | 36.986 |
| Selenium | Se (ppm) | 0.370 | 0.075 | 0.119 | 0.696 |
| Titanium | Ti (wt%) | 0.255 | 0.046 | 0.183 | 0.370 |
| Zinc | Zn (ppm) | 75.534 | 17.614 | 46.418 | 119.100 |