| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.057 | 1.216 | 1.304 | 7.877 |
| Arsenic | As (ppm) | 8.146 | 5.768 | 1.787 | 80.666 |
| Calcium | Ca (wt%) | 3.252 | 1.437 | 0.565 | 11.089 |
| Copper | Cu (ppm) | 14.510 | 5.445 | 1.417 | 36.995 |
| Iron | Fe (wt%) | 2.448 | 0.572 | 0.482 | 4.538 |
| Mercury | Hg (ppm) | 0.022 | 0.009 | 0.010 | 0.086 |
| Magnesium | Mg (wt%) | 1.167 | 0.349 | 0.283 | 2.595 |
| Manganese | Mn (ppm) | 452.583 | 121.757 | 91.310 | 950.093 |
| Sodium | Na (wt%) | 1.196 | 0.509 | 0.083 | 2.418 |
| Phosphorus | P (wt%) | 0.076 | 0.014 | 0.037 | 0.139 |
| Lead | Pb (ppm) | 25.580 | 4.343 | 6.487 | 44.049 |
| Selenium | Se (ppm) | 0.295 | 0.169 | 0.100 | 1.337 |
| Titanium | Ti (wt%) | 0.284 | 0.093 | 0.065 | 0.664 |
| Zinc | Zn (ppm) | 55.803 | 11.476 | 12.771 | 102.132 |