| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.082 | 1.040 | 0.248 | 4.529 |
| Arsenic | As (ppm) | 10.069 | 4.072 | 3.085 | 21.820 |
| Calcium | Ca (wt%) | 1.454 | 0.773 | 0.268 | 4.287 |
| Copper | Cu (ppm) | 16.179 | 7.640 | 3.106 | 33.549 |
| Iron | Fe (wt%) | 1.662 | 0.694 | 0.243 | 3.444 |
| Mercury | Hg (ppm) | 0.022 | 0.011 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.483 | 0.299 | 0.045 | 1.444 |
| Manganese | Mn (ppm) | 969.103 | 349.843 | 103.407 | 1949.140 |
| Sodium | Na (wt%) | 0.050 | 0.029 | 0.006 | 0.136 |
| Phosphorus | P (wt%) | 0.030 | 0.010 | 0.007 | 0.070 |
| Lead | Pb (ppm) | 35.028 | 17.192 | 2.203 | 73.820 |
| Selenium | Se (ppm) | 0.226 | 0.116 | 0.100 | 0.589 |
| Titanium | Ti (wt%) | 0.097 | 0.047 | 0.014 | 0.202 |
| Zinc | Zn (ppm) | 124.146 | 38.072 | 34.174 | 219.469 |