| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.279 | 0.457 | 2.233 | 4.789 |
| Arsenic | As (ppm) | 3.220 | 0.818 | 1.518 | 5.558 |
| Calcium | Ca (wt%) | 2.751 | 0.706 | 1.444 | 5.123 |
| Copper | Cu (ppm) | 6.927 | 1.942 | 2.441 | 12.879 |
| Iron | Fe (wt%) | 1.451 | 0.203 | 0.896 | 2.029 |
| Mercury | Hg (ppm) | 0.017 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.640 | 0.534 | 0.234 | 3.342 |
| Manganese | Mn (ppm) | 275.421 | 58.956 | 141.258 | 415.745 |
| Sodium | Na (wt%) | 0.517 | 0.074 | 0.306 | 0.725 |
| Phosphorus | P (wt%) | 0.024 | 0.007 | 0.010 | 0.044 |
| Lead | Pb (ppm) | 17.538 | 3.262 | 11.465 | 27.802 |
| Selenium | Se (ppm) | 0.148 | 0.046 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.205 | 0.023 | 0.145 | 0.253 |
| Zinc | Zn (ppm) | 37.423 | 12.007 | 17.283 | 83.309 |