| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.367 | 1.088 | 3.228 | 6.844 |
| Arsenic | As (ppm) | 1.376 | 0.204 | 0.867 | 1.780 |
| Calcium | Ca (wt%) | 0.425 | 0.300 | 0.074 | 1.341 |
| Copper | Cu (ppm) | 6.483 | 2.508 | 1.363 | 12.182 |
| Iron | Fe (wt%) | 1.558 | 0.551 | 0.714 | 2.711 |
| Mercury | Hg (ppm) | 0.037 | 0.010 | 0.019 | 0.059 |
| Magnesium | Mg (wt%) | 0.308 | 0.229 | 0.052 | 1.076 |
| Manganese | Mn (ppm) | 480.142 | 104.977 | 313.730 | 756.480 |
| Sodium | Na (wt%) | 0.495 | 0.148 | 0.194 | 0.902 |
| Phosphorus | P (wt%) | 0.030 | 0.007 | 0.018 | 0.045 |
| Lead | Pb (ppm) | 41.781 | 17.128 | 10.092 | 71.209 |
| Selenium | Se (ppm) | 0.144 | 0.016 | 0.105 | 0.192 |
| Titanium | Ti (wt%) | 0.399 | 0.048 | 0.288 | 0.528 |
| Zinc | Zn (ppm) | 31.332 | 5.367 | 23.816 | 45.225 |