| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.072 | 0.208 | 4.272 | 5.731 |
| Arsenic | As (ppm) | 7.242 | 4.253 | 2.104 | 37.172 |
| Calcium | Ca (wt%) | 1.452 | 0.222 | 0.888 | 2.181 |
| Copper | Cu (ppm) | 17.144 | 6.570 | 5.032 | 52.603 |
| Iron | Fe (wt%) | 2.322 | 0.522 | 1.110 | 4.345 |
| Mercury | Hg (ppm) | 0.081 | 0.038 | 0.036 | 0.490 |
| Magnesium | Mg (wt%) | 0.510 | 0.126 | 0.124 | 0.888 |
| Manganese | Mn (ppm) | 875.448 | 209.871 | 435.820 | 1962.730 |
| Sodium | Na (wt%) | 1.476 | 0.086 | 1.166 | 1.725 |
| Phosphorus | P (wt%) | 0.067 | 0.008 | 0.040 | 0.108 |
| Lead | Pb (ppm) | 128.883 | 107.928 | 37.203 | 993.384 |
| Selenium | Se (ppm) | 0.128 | 0.029 | 0.100 | 0.281 |
| Titanium | Ti (wt%) | 0.650 | 0.158 | 0.375 | 1.662 |
| Zinc | Zn (ppm) | 55.938 | 17.221 | 18.613 | 137.810 |