Sample 105
NavDat sample number 18420 · ANDESITE
Sample
| Sample ID | 105 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | phenos of twinned augite; pilotaxitic groundmass |
Location
| Latitude | 44.3398 |
|---|---|
| Longitude | -114.853 |
| Location | western face of Mt. McGowan |
| State / province | Idaho |
| Volcanic field | Challis Volcanics |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 46 | 43 | 49 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 55.28 | WT% | AAS | |
| TIO2 | 1.02 | WT% | AAS | |
| AL2O3 | 14.66 | WT% | AAS | |
| FE2O3 | 3.01 | WT% | AAS | |
| FEO | 4.6 | WT% | TIT | |
| MNO | 0.14 | WT% | AAS | |
| MGO | 4.65 | WT% | AAS | |
| CAO | 7.52 | WT% | AAS | |
| NA2O | 2.95 | WT% | AAS | |
| K2O | 2.7 | WT% | AAS | |
| P2O5 | 0.33 | WT% | AAS | |
| H2O_PLUS | 1.17 | WT% | UNKNOWN | |
| H2O_MINUS | 0.84 | WT% | UNKNOWN | |
| TOTAL | 99.07 | WT% | AAS | |
| RB | 64 | PPM | XRF | |
| SR | 587 | PPM | XRF | |
| BA | 1565 | PPM | AAS | |
| NI | 11 | PPM | AAS | |
| CR | 215 | PPM | AAS | |
| ZR | 158 | PPM | XRF | |
| ZN | 71 | PPM | AAS | |
| CU | 19 | PPM | AAS |