| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.168 | 1.085 | 2.945 | 10.951 |
| Arsenic | As (ppm) | 28.732 | 72.818 | 1.094 | 879.763 |
| Calcium | Ca (wt%) | 1.682 | 0.653 | 0.119 | 6.394 |
| Copper | Cu (ppm) | 10.824 | 4.180 | 1.166 | 27.639 |
| Iron | Fe (wt%) | 2.571 | 0.827 | 0.878 | 8.245 |
| Mercury | Hg (ppm) | 0.087 | 0.073 | 0.010 | 0.738 |
| Magnesium | Mg (wt%) | 0.601 | 0.277 | 0.141 | 3.222 |
| Manganese | Mn (ppm) | 728.094 | 266.580 | 316.636 | 1901.940 |
| Sodium | Na (wt%) | 2.192 | 0.510 | 0.703 | 4.127 |
| Phosphorus | P (wt%) | 0.100 | 0.040 | 0.031 | 0.365 |
| Lead | Pb (ppm) | 24.213 | 5.884 | 8.770 | 70.542 |
| Selenium | Se (ppm) | 0.276 | 0.415 | 0.100 | 4.378 |
| Titanium | Ti (wt%) | 0.359 | 0.158 | 0.137 | 1.545 |
| Zinc | Zn (ppm) | 89.909 | 25.624 | 29.291 | 207.469 |