| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.076 | 0.619 | 1.419 | 4.312 |
| Arsenic | As (ppm) | 1.414 | 0.683 | 0.355 | 3.879 |
| Calcium | Ca (wt%) | 0.859 | 0.378 | 0.117 | 2.023 |
| Copper | Cu (ppm) | 9.650 | 2.199 | 4.105 | 14.357 |
| Iron | Fe (wt%) | 3.048 | 0.562 | 1.612 | 4.701 |
| Mercury | Hg (ppm) | 0.029 | 0.008 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.309 | 0.077 | 0.093 | 0.567 |
| Manganese | Mn (ppm) | 718.757 | 178.250 | 412.255 | 1220.070 |
| Sodium | Na (wt%) | 0.517 | 0.241 | 0.063 | 1.160 |
| Phosphorus | P (wt%) | 0.007 | 0.003 | 0.003 | 0.014 |
| Lead | Pb (ppm) | 19.680 | 3.058 | 13.235 | 33.275 |
| Selenium | Se (ppm) | 0.118 | 0.016 | 0.100 | 0.160 |
| Titanium | Ti (wt%) | 0.795 | 0.164 | 0.441 | 1.162 |
| Zinc | Zn (ppm) | 37.491 | 5.336 | 25.685 | 50.503 |