| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.127 | 1.399 | 2.591 | 9.381 |
| Arsenic | As (ppm) | 5.405 | 1.601 | 1.142 | 9.496 |
| Calcium | Ca (wt%) | 3.625 | 1.076 | 1.166 | 11.544 |
| Copper | Cu (ppm) | 13.512 | 3.867 | 3.689 | 31.026 |
| Iron | Fe (wt%) | 2.071 | 0.734 | 1.096 | 4.730 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 1.323 | 0.388 | 0.472 | 2.433 |
| Manganese | Mn (ppm) | 362.092 | 127.472 | 147.008 | 1097.030 |
| Sodium | Na (wt%) | 0.963 | 0.559 | 0.123 | 2.683 |
| Phosphorus | P (wt%) | 0.072 | 0.013 | 0.048 | 0.125 |
| Lead | Pb (ppm) | 19.518 | 4.382 | 10.803 | 33.627 |
| Selenium | Se (ppm) | 0.418 | 0.221 | 0.101 | 1.760 |
| Titanium | Ti (wt%) | 0.239 | 0.085 | 0.156 | 0.531 |
| Zinc | Zn (ppm) | 63.752 | 41.308 | 29.323 | 498.433 |