| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.709 | 0.790 | 5.618 | 9.126 |
| Arsenic | As (ppm) | 21.390 | 68.624 | 1.352 | 523.193 |
| Calcium | Ca (wt%) | 1.391 | 0.318 | 0.804 | 2.644 |
| Copper | Cu (ppm) | 20.660 | 13.988 | 1.661 | 77.037 |
| Iron | Fe (wt%) | 3.061 | 0.453 | 1.968 | 4.435 |
| Mercury | Hg (ppm) | 0.036 | 0.020 | 0.010 | 0.168 |
| Magnesium | Mg (wt%) | 0.817 | 0.227 | 0.411 | 1.877 |
| Manganese | Mn (ppm) | 727.023 | 147.271 | 369.180 | 1148.110 |
| Sodium | Na (wt%) | 1.594 | 0.318 | 0.956 | 2.628 |
| Phosphorus | P (wt%) | 0.097 | 0.026 | 0.055 | 0.241 |
| Lead | Pb (ppm) | 59.256 | 82.742 | 23.817 | 659.211 |
| Selenium | Se (ppm) | 0.133 | 0.061 | 0.100 | 0.571 |
| Titanium | Ti (wt%) | 0.385 | 0.074 | 0.227 | 0.666 |
| Zinc | Zn (ppm) | 176.534 | 177.677 | 66.147 | 1581.790 |