Sample 18
NavDat sample number 18409 · ANDESITE
Sample
| Sample ID | 18 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | phenos of plag and augite; relict pilotaxitic texture in matrix |
Location
| Latitude | 44.2844 |
|---|---|
| Longitude | -114.823 |
| Location | above Coal Creek |
| 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 | 58.8 | WT% | AAS | |
| TIO2 | 0.72 | WT% | AAS | |
| AL2O3 | 14.79 | WT% | AAS | |
| FE2O3 | 3.67 | WT% | AAS | |
| FEO | 3.33 | WT% | TIT | |
| MNO | 0.11 | WT% | AAS | |
| MGO | 3.53 | WT% | AAS | |
| CAO | 7.39 | WT% | AAS | |
| NA2O | 2.91 | WT% | AAS | |
| K2O | 2.76 | WT% | AAS | |
| P2O5 | 0.36 | WT% | AAS | |
| H2O_PLUS | 1.2 | WT% | UNKNOWN | |
| H2O_MINUS | 0.75 | WT% | UNKNOWN | |
| TOTAL | 100.32 | WT% | AAS | |
| RB | 86 | PPM | XRF | |
| SR | 675 | PPM | XRF | |
| BA | 1515 | PPM | AAS | |
| NI | 17 | PPM | AAS | |
| CR | 259 | PPM | AAS | |
| ZR | 207 | PPM | XRF | |
| ZN | 86 | PPM | AAS | |
| CU | 16 | PPM | AAS |