| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.071 | 0.466 | 2.495 | 5.927 |
| Arsenic | As (ppm) | 8.732 | 1.297 | 5.887 | 15.114 |
| Calcium | Ca (wt%) | 14.773 | 2.346 | 6.463 | 25.894 |
| Copper | Cu (ppm) | 15.401 | 2.645 | 9.352 | 26.397 |
| Iron | Fe (wt%) | 1.890 | 0.189 | 1.546 | 2.662 |
| Mercury | Hg (ppm) | 0.019 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.581 | 0.059 | 0.424 | 0.811 |
| Manganese | Mn (ppm) | 352.834 | 49.551 | 126.009 | 551.232 |
| Sodium | Na (wt%) | 0.457 | 0.100 | 0.117 | 0.780 |
| Phosphorus | P (wt%) | 0.061 | 0.009 | 0.035 | 0.087 |
| Lead | Pb (ppm) | 16.779 | 5.658 | 9.256 | 35.424 |
| Selenium | Se (ppm) | 0.428 | 0.134 | 0.212 | 1.375 |
| Titanium | Ti (wt%) | 0.252 | 0.028 | 0.134 | 0.336 |
| Zinc | Zn (ppm) | 63.155 | 8.028 | 45.394 | 102.274 |