Table 3. The results for of the quartz-magma equilibrium fractionation calculation.
| Sample | Type | Appx. distance from ore body | Description | Whole Rock δ18O (‰) | Quartz δ18O (‰) | Theoretical andesite magma δ18O (‰) | Value fit | Theoretical dacite magma δ18O (‰) | Value fit |
|---|---|---|---|---|---|---|---|---|---|
| KES090048 | Country rock, drillcore | 0 m | Volcanic host rock with hydrous alteration assemblage | 6.9 | 8.0 | 7.1 | ✓ | 7.2 | ✓ |
| KES090065 | Ore sample, drillcore | 0 m | Volcanic host rock with magnetite veins | 4.9 | 5.8 | 4.9 | X | 5.0 | X |
| KES090087 | Ore sample, drillcore | 0 m | Volcanic host rock with disseminated magnetite | 7.1 | 5.9 | 5.0 | X | 5.1 | X |
| KES090003 | Country rock, drillcore | 0 m | Volcanic host rock (meta-dacite) | 6.2 | 7.4 | 6.5 | ✓ | 6.6 | ✓ |
| KH090012 | Country rock | 700 m to S | Volcanic host rock (meta-dacite) | 7.0 | 6.7 | 5.7 | ✓ | 5.8 | ✓ |
| KPN090033B | Country rock | 1000 m to NW | Volcanic host rock (meta-andesite) | 5.6 | 6.2 | 5.3 | X | 5.4 | X |
| KPN090026−4 | Country rock | 1000 m to SW | Volcanic host rock (meta-dacite) | 6.8 | 9.1 | 8.2 | ✓ | 8.3 | ✓ |
| KH09005Ba | Country rock | 1200 m to N | Volcanic host rock (meta-dacite), magnetite-rich | 5.8 | 7.1 | 6.2 | ✓ | 6.3 | ✓ |
| KPN090042A | Country rock | 1400 m to NW | Volcanic host rock (meta-dacite) | 7.5 | 6.0 | 5.1 | X | 5.2 | X |
| KH09005 | Country rock | 1200 m to N | Volcanic host rock (meta-dacite) | 5.8 | 7.0 | 6.1 | ✓ | 6.2 | ✓ |
| KPN090033A | Country rock | 1000 m to NW | Volcanic host rock (meta-dacite) | 8.6 | 10.3 | 9.4 | ✓ | 9.5 | ✓ |
✓ = In equlibrium with magmatic values ; X = not in equilibrium with common magmatic values.