| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.029 | 0.872 | 0.263 | 4.366 |
| Arsenic | As (ppm) | 1.524 | 0.550 | 0.889 | 3.527 |
| Calcium | Ca (wt%) | 0.059 | 0.046 | 0.011 | 0.206 |
| Copper | Cu (ppm) | 2.358 | 1.213 | 1.000 | 6.476 |
| Iron | Fe (wt%) | 0.465 | 0.283 | 0.184 | 1.549 |
| Mercury | Hg (ppm) | 0.042 | 0.020 | 0.011 | 0.089 |
| Magnesium | Mg (wt%) | 0.028 | 0.028 | 0.006 | 0.136 |
| Manganese | Mn (ppm) | 125.228 | 46.611 | 45.881 | 257.292 |
| Sodium | Na (wt%) | 0.063 | 0.048 | 0.004 | 0.237 |
| Phosphorus | P (wt%) | 0.020 | 0.008 | 0.007 | 0.040 |
| Lead | Pb (ppm) | 15.523 | 4.053 | 8.518 | 26.864 |
| Selenium | Se (ppm) | 0.164 | 0.056 | 0.101 | 0.404 |
| Titanium | Ti (wt%) | 0.444 | 0.067 | 0.277 | 0.583 |
| Zinc | Zn (ppm) | 10.923 | 6.464 | 3.338 | 33.161 |