| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.199 | 0.612 | 3.119 | 7.543 |
| Arsenic | As (ppm) | 6.511 | 1.300 | 2.541 | 15.592 |
| Calcium | Ca (wt%) | 2.760 | 0.819 | 1.180 | 4.748 |
| Copper | Cu (ppm) | 15.186 | 3.568 | 8.047 | 26.870 |
| Iron | Fe (wt%) | 2.047 | 0.330 | 0.950 | 3.579 |
| Mercury | Hg (ppm) | 0.021 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 1.285 | 0.426 | 0.462 | 2.232 |
| Manganese | Mn (ppm) | 342.389 | 112.181 | 81.087 | 1091.310 |
| Sodium | Na (wt%) | 0.866 | 0.215 | 0.444 | 1.882 |
| Phosphorus | P (wt%) | 0.062 | 0.008 | 0.040 | 0.089 |
| Lead | Pb (ppm) | 18.758 | 5.234 | 9.038 | 38.999 |
| Selenium | Se (ppm) | 0.347 | 0.170 | 0.103 | 1.650 |
| Titanium | Ti (wt%) | 0.213 | 0.032 | 0.126 | 0.336 |
| Zinc | Zn (ppm) | 53.580 | 8.037 | 30.373 | 99.955 |