Sample 67a
NavDat sample number 18415 · ANDESITE
Sample
| Sample ID | 67a |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | altered; phenos of plag and augite; oxidized and partially recrystallized cryptofelsic groundmass |
Location
| Latitude | 44.3453 |
|---|---|
| Longitude | -114.783 |
| Location | above headwaters of East Basin 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 | 60.37 | WT% | AAS | |
| TIO2 | 1 | WT% | AAS | |
| AL2O3 | 16.68 | WT% | AAS | |
| FE2O3 | 4.25 | WT% | AAS | |
| FEO | 1.58 | WT% | TIT | |
| MNO | 0.1 | WT% | AAS | |
| MGO | 2.03 | WT% | AAS | |
| CAO | 4.53 | WT% | AAS | |
| NA2O | 3.31 | WT% | AAS | |
| K2O | 3.41 | WT% | AAS | |
| P2O5 | 0.26 | WT% | AAS | |
| H2O_PLUS | 1.42 | WT% | UNKNOWN | |
| H2O_MINUS | 0.79 | WT% | UNKNOWN | |
| TOTAL | 99.73 | WT% | AAS | |
| RB | 119 | PPM | XRF | |
| SR | 508 | PPM | XRF | |
| BA | 1430 | PPM | AAS | |
| NI | 16 | PPM | AAS | |
| CR | 73 | PPM | AAS | |
| ZR | 221 | PPM | XRF | |
| ZN | 85 | PPM | AAS | |
| CU | 8 | PPM | AAS |