| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.236 | 0.497 | 0.322 | 3.236 |
| Arsenic | As (ppm) | 3.498 | 1.108 | 0.850 | 6.766 |
| Calcium | Ca (wt%) | 0.346 | 0.425 | 0.022 | 2.685 |
| Copper | Cu (ppm) | 4.164 | 1.293 | 1.005 | 8.925 |
| Iron | Fe (wt%) | 0.660 | 0.251 | 0.229 | 1.303 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.075 | 0.037 | 0.014 | 0.205 |
| Manganese | Mn (ppm) | 193.337 | 89.928 | 39.371 | 607.597 |
| Sodium | Na (wt%) | 0.059 | 0.039 | 0.011 | 0.370 |
| Phosphorus | P (wt%) | 0.009 | 0.003 | 0.005 | 0.023 |
| Lead | Pb (ppm) | 10.585 | 5.204 | 5.038 | 40.623 |
| Selenium | Se (ppm) | 0.186 | 0.040 | 0.103 | 0.370 |
| Titanium | Ti (wt%) | 0.190 | 0.056 | 0.104 | 0.365 |
| Zinc | Zn (ppm) | 10.985 | 5.355 | 1.195 | 28.664 |