| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.729 | 1.333 | 0.160 | 5.497 |
| Arsenic | As (ppm) | 3.858 | 2.091 | 0.800 | 9.264 |
| Calcium | Ca (wt%) | 0.442 | 0.514 | 0.010 | 3.123 |
| Copper | Cu (ppm) | 6.033 | 4.280 | 1.001 | 19.798 |
| Iron | Fe (wt%) | 0.836 | 0.530 | 0.040 | 2.343 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.043 |
| Magnesium | Mg (wt%) | 0.230 | 0.204 | 0.003 | 1.033 |
| Manganese | Mn (ppm) | 321.838 | 221.380 | 27.031 | 1315.780 |
| Sodium | Na (wt%) | 0.259 | 0.221 | 0.009 | 0.895 |
| Phosphorus | P (wt%) | 0.022 | 0.015 | 0.003 | 0.059 |
| Lead | Pb (ppm) | 8.470 | 4.536 | 2.001 | 22.606 |
| Selenium | Se (ppm) | 0.166 | 0.092 | 0.100 | 0.583 |
| Titanium | Ti (wt%) | 0.172 | 0.075 | 0.028 | 0.359 |
| Zinc | Zn (ppm) | 21.335 | 15.272 | 2.002 | 68.175 |