| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.693 | 0.397 | 2.913 | 4.400 |
| Arsenic | As (ppm) | 3.648 | 0.717 | 2.321 | 5.474 |
| Calcium | Ca (wt%) | 4.539 | 1.982 | 1.059 | 10.136 |
| Copper | Cu (ppm) | 8.048 | 2.595 | 4.076 | 14.000 |
| Iron | Fe (wt%) | 1.705 | 0.294 | 1.124 | 2.497 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.610 | 0.325 | 0.174 | 1.533 |
| Manganese | Mn (ppm) | 337.799 | 47.990 | 252.468 | 431.777 |
| Sodium | Na (wt%) | 0.604 | 0.079 | 0.486 | 0.768 |
| Phosphorus | P (wt%) | 0.031 | 0.007 | 0.015 | 0.040 |
| Lead | Pb (ppm) | 16.535 | 1.128 | 14.544 | 21.214 |
| Selenium | Se (ppm) | 0.310 | 0.155 | 0.106 | 0.795 |
| Titanium | Ti (wt%) | 0.235 | 0.039 | 0.168 | 0.333 |
| Zinc | Zn (ppm) | 33.845 | 7.555 | 22.294 | 49.841 |