| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.498 | 0.523 | 5.426 | 8.260 |
| Arsenic | As (ppm) | 11.006 | 4.018 | 4.593 | 23.798 |
| Calcium | Ca (wt%) | 3.093 | 0.900 | 1.351 | 5.114 |
| Copper | Cu (ppm) | 29.318 | 12.136 | 17.316 | 96.346 |
| Iron | Fe (wt%) | 3.279 | 0.485 | 2.355 | 5.452 |
| Mercury | Hg (ppm) | 0.081 | 0.054 | 0.015 | 0.335 |
| Magnesium | Mg (wt%) | 1.542 | 0.356 | 0.932 | 2.937 |
| Manganese | Mn (ppm) | 626.409 | 127.546 | 351.415 | 1217.990 |
| Sodium | Na (wt%) | 0.955 | 0.160 | 0.567 | 1.463 |
| Phosphorus | P (wt%) | 0.070 | 0.013 | 0.041 | 0.122 |
| Lead | Pb (ppm) | 31.693 | 9.668 | 18.761 | 80.931 |
| Selenium | Se (ppm) | 0.409 | 0.158 | 0.101 | 0.871 |
| Titanium | Ti (wt%) | 0.314 | 0.066 | 0.116 | 0.520 |
| Zinc | Zn (ppm) | 96.699 | 24.092 | 67.767 | 229.847 |