Sample IG 37A
NavDat sample number 11650 · GRANITE
Sample
| Sample ID | IG 37A |
|---|---|
| Rock name | GRANITE |
| Rock type | PLUTONIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | medium to coarse grained with occasional K-feldspar megacrysts |
Location
| Latitude | 46.4983 |
|---|---|
| Longitude | -114.385 |
| 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 | 72.54 | WT% | XRF | |
| AL2O3 | 14.8 | WT% | XRF | |
| FE2O3T | 1.92 | WT% | XRF | |
| CAO | 1.42 | WT% | XRF | |
| K2O | 5.3 | WT% | XRF | |
| TIO2 | 0.24 | WT% | XRF | |
| NA2O | 3.5 | WT% | EPMA | |
| MGO | 0.35 | WT% | EPMA | |
| LOI | 1.61 | WT% | XRF | |
| TOTAL | 101.68 | WT% | XRF | |
| ZR | 173 | PPM | XRF | |
| NB | 12 | PPM | XRF | |
| Y | 13 | PPM | XRF | |
| RB | 176 | PPM | XRF | |
| SR | 297 | PPM | XRF | |
| BA | 889 | PPM | XRF | |
| SR87_SR86 | 0.7103 | TIMS | ||
| PB206_PB204 | 18.033 | TIMS | ||
| PB207_PB204 | 15.59 | TIMS | ||
| PB208_PB204 | 38.098 | TIMS | ||
| SM | 3.6 | PPM | MS-ID | |
| ND | 22.7 | PPM | MS-ID | |
| ND143_ND144 | 0.51155 | TIMS |