| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.108 | 0.599 | 2.410 | 5.772 |
| Arsenic | As (ppm) | 8.257 | 3.535 | 2.590 | 29.452 |
| Calcium | Ca (wt%) | 0.347 | 0.128 | 0.142 | 0.730 |
| Copper | Cu (ppm) | 11.120 | 2.253 | 4.832 | 19.977 |
| Iron | Fe (wt%) | 1.856 | 0.385 | 0.825 | 3.549 |
| Mercury | Hg (ppm) | 0.051 | 0.011 | 0.021 | 0.087 |
| Magnesium | Mg (wt%) | 0.238 | 0.065 | 0.087 | 0.461 |
| Manganese | Mn (ppm) | 802.439 | 320.890 | 259.901 | 2329.310 |
| Sodium | Na (wt%) | 0.636 | 0.110 | 0.398 | 0.989 |
| Phosphorus | P (wt%) | 0.042 | 0.023 | 0.013 | 0.167 |
| Lead | Pb (ppm) | 22.401 | 5.139 | 4.226 | 35.078 |
| Selenium | Se (ppm) | 0.360 | 0.104 | 0.105 | 0.758 |
| Titanium | Ti (wt%) | 0.336 | 0.035 | 0.225 | 0.483 |
| Zinc | Zn (ppm) | 43.965 | 15.140 | 17.355 | 102.597 |