| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.862 | 0.347 | 0.275 | 2.005 |
| Arsenic | As (ppm) | 2.591 | 0.729 | 1.183 | 5.803 |
| Calcium | Ca (wt%) | 0.622 | 0.496 | 0.070 | 2.470 |
| Copper | Cu (ppm) | 4.858 | 2.099 | 1.122 | 12.597 |
| Iron | Fe (wt%) | 0.633 | 0.244 | 0.283 | 1.524 |
| Mercury | Hg (ppm) | 0.066 | 0.034 | 0.013 | 0.225 |
| Magnesium | Mg (wt%) | 0.067 | 0.050 | 0.012 | 0.329 |
| Manganese | Mn (ppm) | 99.778 | 33.916 | 44.323 | 240.741 |
| Sodium | Na (wt%) | 0.107 | 0.145 | 0.007 | 0.946 |
| Phosphorus | P (wt%) | 0.046 | 0.029 | 0.005 | 0.168 |
| Lead | Pb (ppm) | 103.060 | 185.638 | 13.441 | 1384.970 |
| Selenium | Se (ppm) | 0.469 | 0.235 | 0.123 | 1.552 |
| Titanium | Ti (wt%) | 0.441 | 0.072 | 0.246 | 0.774 |
| Zinc | Zn (ppm) | 135.746 | 247.059 | 8.685 | 1845.980 |