| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.253 | 1.316 | 2.484 | 7.236 |
| Arsenic | As (ppm) | 9.261 | 2.110 | 3.966 | 16.149 |
| Calcium | Ca (wt%) | 0.476 | 0.458 | 0.133 | 2.900 |
| Copper | Cu (ppm) | 14.926 | 4.446 | 5.910 | 28.290 |
| Iron | Fe (wt%) | 2.971 | 0.627 | 1.482 | 5.274 |
| Mercury | Hg (ppm) | 0.070 | 0.012 | 0.043 | 0.090 |
| Magnesium | Mg (wt%) | 0.467 | 0.263 | 0.148 | 1.285 |
| Manganese | Mn (ppm) | 588.463 | 244.849 | 239.177 | 1217.040 |
| Sodium | Na (wt%) | 0.770 | 0.497 | 0.179 | 1.837 |
| Phosphorus | P (wt%) | 0.072 | 0.023 | 0.037 | 0.154 |
| Lead | Pb (ppm) | 40.340 | 3.779 | 23.387 | 46.691 |
| Selenium | Se (ppm) | 0.540 | 0.104 | 0.251 | 0.749 |
| Titanium | Ti (wt%) | 0.654 | 0.202 | 0.258 | 1.176 |
| Zinc | Zn (ppm) | 73.599 | 20.315 | 40.323 | 128.259 |