| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.251 | 1.182 | 0.548 | 6.117 |
| Arsenic | As (ppm) | 9.091 | 4.513 | 1.609 | 39.721 |
| Calcium | Ca (wt%) | 0.640 | 0.415 | 0.059 | 2.534 |
| Copper | Cu (ppm) | 7.166 | 2.822 | 1.544 | 15.130 |
| Iron | Fe (wt%) | 1.713 | 0.580 | 0.356 | 4.741 |
| Mercury | Hg (ppm) | 0.022 | 0.007 | 0.010 | 0.045 |
| Magnesium | Mg (wt%) | 0.283 | 0.133 | 0.039 | 0.705 |
| Manganese | Mn (ppm) | 696.426 | 480.906 | 136.036 | 3610.430 |
| Sodium | Na (wt%) | 0.494 | 0.181 | 0.085 | 0.891 |
| Phosphorus | P (wt%) | 0.044 | 0.013 | 0.008 | 0.099 |
| Lead | Pb (ppm) | 18.256 | 4.420 | 3.353 | 35.681 |
| Selenium | Se (ppm) | 0.284 | 0.106 | 0.101 | 0.774 |
| Titanium | Ti (wt%) | 0.308 | 0.090 | 0.091 | 0.694 |
| Zinc | Zn (ppm) | 39.983 | 12.974 | 6.266 | 84.205 |