| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.852 | 0.652 | 1.813 | 5.147 |
| Arsenic | As (ppm) | 1.227 | 0.440 | 0.473 | 2.699 |
| Calcium | Ca (wt%) | 0.133 | 0.032 | 0.054 | 0.236 |
| Copper | Cu (ppm) | 8.036 | 3.502 | 4.168 | 21.158 |
| Iron | Fe (wt%) | 2.458 | 0.562 | 1.284 | 3.808 |
| Mercury | Hg (ppm) | 0.020 | 0.007 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.232 | 0.047 | 0.130 | 0.368 |
| Manganese | Mn (ppm) | 598.922 | 144.770 | 310.075 | 962.300 |
| Sodium | Na (wt%) | 0.140 | 0.040 | 0.081 | 0.266 |
| Phosphorus | P (wt%) | 0.017 | 0.008 | 0.007 | 0.048 |
| Lead | Pb (ppm) | 15.872 | 3.582 | 7.451 | 26.045 |
| Selenium | Se (ppm) | 0.131 | 0.038 | 0.100 | 0.289 |
| Titanium | Ti (wt%) | 0.656 | 0.113 | 0.445 | 1.156 |
| Zinc | Zn (ppm) | 44.471 | 9.043 | 24.591 | 69.924 |