| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.244 | 0.573 | 1.512 | 5.569 |
| Arsenic | As (ppm) | 7.687 | 3.831 | 3.970 | 23.766 |
| Calcium | Ca (wt%) | 9.306 | 2.798 | 4.434 | 17.729 |
| Copper | Cu (ppm) | 16.440 | 2.594 | 7.200 | 23.459 |
| Iron | Fe (wt%) | 1.831 | 0.237 | 0.739 | 2.348 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.036 |
| Magnesium | Mg (wt%) | 0.703 | 0.181 | 0.277 | 1.111 |
| Manganese | Mn (ppm) | 399.900 | 63.722 | 215.952 | 537.753 |
| Sodium | Na (wt%) | 0.250 | 0.051 | 0.082 | 0.463 |
| Phosphorus | P (wt%) | 0.059 | 0.010 | 0.029 | 0.078 |
| Lead | Pb (ppm) | 14.552 | 2.357 | 3.953 | 18.871 |
| Selenium | Se (ppm) | 0.453 | 0.420 | 0.101 | 2.756 |
| Titanium | Ti (wt%) | 0.223 | 0.029 | 0.086 | 0.283 |
| Zinc | Zn (ppm) | 70.393 | 17.616 | 19.373 | 128.370 |