| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.025 | 0.534 | 5.128 | 10.203 |
| Arsenic | As (ppm) | 11.328 | 7.854 | 1.494 | 74.458 |
| Calcium | Ca (wt%) | 0.819 | 0.206 | 0.146 | 1.879 |
| Copper | Cu (ppm) | 11.548 | 5.196 | 3.815 | 40.354 |
| Iron | Fe (wt%) | 2.582 | 0.634 | 1.386 | 4.352 |
| Mercury | Hg (ppm) | 0.035 | 0.015 | 0.010 | 0.147 |
| Magnesium | Mg (wt%) | 0.645 | 0.193 | 0.316 | 1.412 |
| Manganese | Mn (ppm) | 668.359 | 237.208 | 174.330 | 2307.690 |
| Sodium | Na (wt%) | 1.527 | 0.173 | 0.790 | 2.244 |
| Phosphorus | P (wt%) | 0.051 | 0.013 | 0.022 | 0.139 |
| Lead | Pb (ppm) | 37.961 | 24.090 | 13.579 | 204.978 |
| Selenium | Se (ppm) | 0.262 | 0.158 | 0.100 | 1.480 |
| Titanium | Ti (wt%) | 0.381 | 0.064 | 0.229 | 0.645 |
| Zinc | Zn (ppm) | 62.343 | 27.408 | 25.232 | 458.597 |