| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.174 | 0.297 | 4.217 | 6.145 |
| Arsenic | As (ppm) | 6.014 | 1.313 | 2.402 | 9.488 |
| Calcium | Ca (wt%) | 1.827 | 0.531 | 0.591 | 3.335 |
| Copper | Cu (ppm) | 17.036 | 6.672 | 7.017 | 63.481 |
| Iron | Fe (wt%) | 2.080 | 0.482 | 1.514 | 4.872 |
| Mercury | Hg (ppm) | 0.022 | 0.006 | 0.010 | 0.046 |
| Magnesium | Mg (wt%) | 0.935 | 0.522 | 0.402 | 4.140 |
| Manganese | Mn (ppm) | 370.706 | 81.384 | 183.734 | 771.551 |
| Sodium | Na (wt%) | 1.001 | 0.072 | 0.688 | 1.311 |
| Phosphorus | P (wt%) | 0.059 | 0.018 | 0.042 | 0.159 |
| Lead | Pb (ppm) | 15.820 | 3.103 | 8.276 | 31.121 |
| Selenium | Se (ppm) | 0.288 | 0.063 | 0.101 | 0.591 |
| Titanium | Ti (wt%) | 0.227 | 0.022 | 0.170 | 0.328 |
| Zinc | Zn (ppm) | 63.894 | 20.401 | 31.687 | 223.466 |