| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.369 | 0.820 | 0.483 | 4.673 |
| Arsenic | As (ppm) | 4.824 | 1.488 | 1.269 | 9.774 |
| Calcium | Ca (wt%) | 0.339 | 0.352 | 0.035 | 2.112 |
| Copper | Cu (ppm) | 6.349 | 2.097 | 1.199 | 11.935 |
| Iron | Fe (wt%) | 1.236 | 0.380 | 0.336 | 2.566 |
| Mercury | Hg (ppm) | 0.016 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.162 | 0.082 | 0.023 | 0.436 |
| Manganese | Mn (ppm) | 633.779 | 288.203 | 104.989 | 1766.530 |
| Sodium | Na (wt%) | 0.353 | 0.160 | 0.040 | 0.864 |
| Phosphorus | P (wt%) | 0.030 | 0.011 | 0.008 | 0.062 |
| Lead | Pb (ppm) | 15.040 | 3.182 | 5.917 | 23.795 |
| Selenium | Se (ppm) | 0.162 | 0.047 | 0.100 | 0.378 |
| Titanium | Ti (wt%) | 0.342 | 0.070 | 0.113 | 0.586 |
| Zinc | Zn (ppm) | 27.825 | 9.467 | 7.619 | 60.426 |