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Sample IG 15A
NavDat sample number 11639 · GRANITE
Sample
| Sample ID | IG 15A |
|---|
| Rock name | GRANITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | coarse, with K-feldspar megacrysts |
|---|
Location
| Latitude | 46.5283 |
|---|
| Longitude | -114.343 |
|---|
| State / province | Montana |
|---|
| Volcanic field | Idaho batholith, Bitterroot lobe |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 62 |
|
60 |
80 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 67.43 | | WT% | XRF |
| AL2O3 | 16.31 | | WT% | XRF |
| FE2O3T | 1.86 | | WT% | XRF |
| CAO | 1.6 | | WT% | XRF |
| K2O | 7.18 | | WT% | XRF |
| TIO2 | 0.28 | | WT% | XRF |
| NA2O | 3.33 | | WT% | EPMA |
| MGO | 0.46 | | WT% | EPMA |
| LOI | 2.32 | | WT% | XRF |
| TOTAL | 100.77 | | WT% | XRF |
| ZR | 153 | | PPM | XRF |
| NB | 11 | | PPM | XRF |
| Y | 10 | | PPM | XRF |
| RB | 186 | | PPM | XRF |
| SR | 572 | | PPM | XRF |
| BA | 2815 | | PPM | XRF |
| SR87_SR86 | 0.7091 | | | TIMS |
