| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.245 | 0.487 | 4.300 | 6.647 |
| Arsenic | As (ppm) | 7.276 | 4.268 | 0.930 | 19.815 |
| Calcium | Ca (wt%) | 1.209 | 0.321 | 0.687 | 4.074 |
| Copper | Cu (ppm) | 10.081 | 4.751 | 3.991 | 36.752 |
| Iron | Fe (wt%) | 1.846 | 0.481 | 0.972 | 4.232 |
| Mercury | Hg (ppm) | 0.077 | 0.034 | 0.033 | 0.297 |
| Magnesium | Mg (wt%) | 0.472 | 0.180 | 0.177 | 1.241 |
| Manganese | Mn (ppm) | 819.761 | 214.271 | 503.944 | 2531.470 |
| Sodium | Na (wt%) | 1.476 | 0.106 | 1.203 | 2.194 |
| Phosphorus | P (wt%) | 0.072 | 0.036 | 0.033 | 0.429 |
| Lead | Pb (ppm) | 50.024 | 28.727 | 27.252 | 256.804 |
| Selenium | Se (ppm) | 0.202 | 0.105 | 0.100 | 0.499 |
| Titanium | Ti (wt%) | 0.412 | 0.047 | 0.309 | 0.613 |
| Zinc | Zn (ppm) | 44.358 | 19.137 | 15.943 | 104.565 |