Sample 171
NavDat sample number 18429 · DACITE
Sample
| Sample ID | 171 |
|---|---|
| Rock name | DACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | fine-grained; microphenos of plag and augite; felted groundmass, commonly altered |
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 | 65.37 | WT% | AAS | |
| TIO2 | 0.96 | WT% | AAS | |
| AL2O3 | 14.49 | WT% | AAS | |
| FE2O3 | 3.71 | WT% | AAS | |
| FEO | 1.57 | WT% | TIT | |
| MNO | 0.06 | WT% | AAS | |
| MGO | 1.88 | WT% | AAS | |
| CAO | 3.21 | WT% | AAS | |
| NA2O | 3.7 | WT% | AAS | |
| K2O | 3.37 | WT% | AAS | |
| P2O5 | 0.25 | WT% | AAS | |
| H2O_PLUS | 1.04 | WT% | UNKNOWN | |
| H2O_MINUS | 1.23 | WT% | UNKNOWN | |
| TOTAL | 100.86 | WT% | AAS | |
| RB | 134 | PPM | XRF | |
| SR | 280 | PPM | XRF | |
| BA | 478 | PPM | AAS | |
| NI | 7 | PPM | AAS | |
| CR | 10 | PPM | AAS | |
| ZR | 320 | PPM | XRF | |
| ZN | 114 | PPM | AAS | |
| CU | 1 | PPM | AAS |