| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.767 | 0.509 | 4.551 | 6.964 |
| Arsenic | As (ppm) | 13.407 | 2.657 | 8.521 | 19.119 |
| Calcium | Ca (wt%) | 0.446 | 0.170 | 0.222 | 1.015 |
| Copper | Cu (ppm) | 18.634 | 3.297 | 11.807 | 29.556 |
| Iron | Fe (wt%) | 3.288 | 0.342 | 2.338 | 3.865 |
| Mercury | Hg (ppm) | 0.029 | 0.007 | 0.018 | 0.053 |
| Magnesium | Mg (wt%) | 0.545 | 0.047 | 0.425 | 0.657 |
| Manganese | Mn (ppm) | 456.686 | 63.492 | 321.006 | 600.457 |
| Sodium | Na (wt%) | 0.652 | 0.069 | 0.526 | 0.858 |
| Phosphorus | P (wt%) | 0.041 | 0.003 | 0.033 | 0.049 |
| Lead | Pb (ppm) | 15.018 | 1.379 | 12.044 | 19.197 |
| Selenium | Se (ppm) | 0.321 | 0.032 | 0.200 | 0.399 |
| Titanium | Ti (wt%) | 0.403 | 0.027 | 0.365 | 0.481 |
| Zinc | Zn (ppm) | 83.462 | 7.061 | 62.956 | 96.385 |