| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.127 | 1.102 | 1.345 | 5.984 |
| Arsenic | As (ppm) | 4.154 | 2.124 | 1.348 | 10.450 |
| Calcium | Ca (wt%) | 0.309 | 0.227 | 0.066 | 0.955 |
| Copper | Cu (ppm) | 9.997 | 4.173 | 5.289 | 23.527 |
| Iron | Fe (wt%) | 1.255 | 0.451 | 0.596 | 2.515 |
| Mercury | Hg (ppm) | 0.066 | 0.021 | 0.017 | 0.126 |
| Magnesium | Mg (wt%) | 0.219 | 0.145 | 0.060 | 0.627 |
| Manganese | Mn (ppm) | 329.907 | 89.765 | 111.262 | 592.190 |
| Sodium | Na (wt%) | 0.346 | 0.101 | 0.114 | 0.625 |
| Phosphorus | P (wt%) | 0.027 | 0.007 | 0.017 | 0.045 |
| Lead | Pb (ppm) | 18.544 | 4.570 | 9.565 | 29.245 |
| Selenium | Se (ppm) | 0.387 | 0.124 | 0.108 | 0.687 |
| Titanium | Ti (wt%) | 0.285 | 0.014 | 0.223 | 0.324 |
| Zinc | Zn (ppm) | 52.822 | 21.326 | 22.442 | 146.598 |