| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.107 | 0.459 | 4.681 | 6.989 |
| Arsenic | As (ppm) | 10.506 | 1.920 | 6.914 | 18.647 |
| Calcium | Ca (wt%) | 0.627 | 0.303 | 0.216 | 1.606 |
| Copper | Cu (ppm) | 14.752 | 3.232 | 7.949 | 24.072 |
| Iron | Fe (wt%) | 3.574 | 0.469 | 2.332 | 4.970 |
| Mercury | Hg (ppm) | 0.040 | 0.009 | 0.020 | 0.070 |
| Magnesium | Mg (wt%) | 0.527 | 0.096 | 0.384 | 0.740 |
| Manganese | Mn (ppm) | 916.276 | 104.858 | 595.244 | 1314.520 |
| Sodium | Na (wt%) | 0.500 | 0.035 | 0.379 | 0.631 |
| Phosphorus | P (wt%) | 0.050 | 0.006 | 0.031 | 0.065 |
| Lead | Pb (ppm) | 26.777 | 4.303 | 17.749 | 43.866 |
| Selenium | Se (ppm) | 0.489 | 0.212 | 0.175 | 1.192 |
| Titanium | Ti (wt%) | 0.313 | 0.008 | 0.271 | 0.335 |
| Zinc | Zn (ppm) | 83.524 | 6.990 | 59.883 | 103.260 |