| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.443 | 0.603 | 0.787 | 3.974 |
| Arsenic | As (ppm) | 5.510 | 2.254 | 2.010 | 12.552 |
| Calcium | Ca (wt%) | 0.214 | 0.076 | 0.045 | 0.426 |
| Copper | Cu (ppm) | 6.381 | 4.060 | 2.283 | 27.039 |
| Iron | Fe (wt%) | 1.261 | 0.535 | 0.318 | 2.941 |
| Mercury | Hg (ppm) | 0.023 | 0.016 | 0.010 | 0.094 |
| Magnesium | Mg (wt%) | 0.141 | 0.059 | 0.039 | 0.385 |
| Manganese | Mn (ppm) | 220.902 | 62.862 | 86.197 | 365.733 |
| Sodium | Na (wt%) | 0.278 | 0.100 | 0.062 | 0.539 |
| Phosphorus | P (wt%) | 0.018 | 0.007 | 0.006 | 0.048 |
| Lead | Pb (ppm) | 14.378 | 3.553 | 6.262 | 25.324 |
| Selenium | Se (ppm) | 0.245 | 0.076 | 0.103 | 0.486 |
| Titanium | Ti (wt%) | 0.335 | 0.049 | 0.210 | 0.467 |
| Zinc | Zn (ppm) | 33.290 | 21.797 | 8.345 | 134.813 |