| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.443 | 0.736 | 3.266 | 9.486 |
| Arsenic | As (ppm) | 6.939 | 5.056 | 1.650 | 27.574 |
| Calcium | Ca (wt%) | 2.695 | 0.988 | 0.112 | 7.517 |
| Copper | Cu (ppm) | 34.275 | 12.158 | 7.256 | 115.370 |
| Iron | Fe (wt%) | 4.784 | 1.516 | 1.839 | 9.369 |
| Mercury | Hg (ppm) | 0.059 | 0.110 | 0.010 | 1.231 |
| Magnesium | Mg (wt%) | 1.340 | 0.504 | 0.147 | 2.813 |
| Manganese | Mn (ppm) | 931.134 | 169.527 | 517.310 | 1685.830 |
| Sodium | Na (wt%) | 1.826 | 0.377 | 0.147 | 2.947 |
| Phosphorus | P (wt%) | 0.077 | 0.018 | 0.027 | 0.134 |
| Lead | Pb (ppm) | 12.580 | 4.160 | 2.360 | 25.783 |
| Selenium | Se (ppm) | 0.217 | 0.122 | 0.100 | 0.977 |
| Titanium | Ti (wt%) | 0.658 | 0.250 | 0.222 | 1.342 |
| Zinc | Zn (ppm) | 110.606 | 40.335 | 47.180 | 751.926 |