Sample 121
NavDat sample number 18428 · DACITE
Sample
| Sample ID | 121 |
|---|---|
| Rock name | DACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | fine-grained and slightly altered; rare microphenos of plag, augite, and hypersthene |
Location
| Latitude | 44.3362 |
|---|---|
| Longitude | -114.804 |
| Location | south of hill 9003 |
| 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 | 63.57 | WT% | AAS | |
| TIO2 | 1.07 | WT% | AAS | |
| AL2O3 | 14.45 | WT% | AAS | |
| FE2O3 | 3.92 | WT% | AAS | |
| FEO | 1.62 | WT% | TIT | |
| MNO | 0.07 | WT% | AAS | |
| MGO | 1.72 | WT% | AAS | |
| CAO | 3.13 | WT% | AAS | |
| NA2O | 3.55 | WT% | AAS | |
| K2O | 3.52 | WT% | AAS | |
| P2O5 | 0.38 | WT% | AAS | |
| H2O_PLUS | 1.32 | WT% | UNKNOWN | |
| H2O_MINUS | 0.87 | WT% | UNKNOWN | |
| TOTAL | 99.19 | WT% | AAS | |
| RB | 149 | PPM | XRF | |
| SR | 249 | PPM | XRF | |
| BA | 854 | PPM | AAS | |
| NI | 7 | PPM | AAS | |
| CR | 13 | PPM | AAS | |
| ZR | 310 | PPM | XRF | |
| ZN | 80 | PPM | AAS |