| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.328 | 0.284 | 3.301 | 5.486 |
| Arsenic | As (ppm) | 6.941 | 0.454 | 5.367 | 8.292 |
| Calcium | Ca (wt%) | 0.991 | 1.006 | 0.154 | 6.426 |
| Copper | Cu (ppm) | 7.235 | 2.931 | 1.000 | 14.470 |
| Iron | Fe (wt%) | 2.731 | 0.322 | 2.134 | 4.565 |
| Mercury | Hg (ppm) | 0.297 | 0.329 | 0.050 | 1.582 |
| Magnesium | Mg (wt%) | 0.537 | 0.156 | 0.343 | 1.156 |
| Manganese | Mn (ppm) | 592.755 | 120.936 | 297.376 | 920.164 |
| Sodium | Na (wt%) | 0.552 | 0.091 | 0.468 | 0.975 |
| Phosphorus | P (wt%) | 0.050 | 0.009 | 0.031 | 0.080 |
| Lead | Pb (ppm) | 30.182 | 6.259 | 18.850 | 63.198 |
| Selenium | Se (ppm) | 0.194 | 0.049 | 0.104 | 0.300 |
| Titanium | Ti (wt%) | 0.280 | 0.086 | 0.207 | 0.815 |
| Zinc | Zn (ppm) | 79.385 | 10.517 | 59.345 | 135.205 |