Sample 95ID-42B
NavDat sample number 38657 · TRACHYANDESITE
Sample
| Sample ID | 95ID-42B |
|---|---|
| Rock name | TRACHYANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | fine grained porphyritic with phenos of plag, opx, cpx, opaques, and bio; cryptocrystalline groundmass |
Location
| Latitude | 44.4433 |
|---|---|
| Longitude | -114.227 |
| Location | Birch Creek; same locality as 95ID-42A but different dike |
| State / province | Idaho |
| Volcanic field | dike from Tdf unit, Challis Volcanic Group |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 48 | 46 | 50 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 64.42 | WT% | XRF | |
| TIO2 | 0.73 | WT% | XRF | |
| AL2O3 | 15.52 | WT% | XRF | |
| FEOT | 4.79 | WT% | XRF | |
| MNO | 0.09 | WT% | XRF | |
| MGO | 2.91 | WT% | XRF | |
| CAO | 4.92 | WT% | XRF | |
| NA2O | 4.04 | WT% | XRF | |
| K2O | 2.35 | WT% | XRF | |
| P2O5 | 0.23 | WT% | XRF | |
| LOI | 2.22 | WT% | XRF | |
| TOTAL | 100 | WT% | XRF | |
| NI | 12 | PPM | XRF | |
| CR | 67 | PPM | XRF | |
| SC | 18 | PPM | XRF | |
| V | 89 | PPM | XRF | |
| GA | 21 | PPM | XRF | |
| CU | 8 | PPM | XRF | |
| ZN | 66 | PPM | XRF | |
| ZR | 207 | PPM | XRF | |
| NB | 18.5 | PPM | XRF | |
| BA | 1133 | PPM | XRF | |
| RB | 121 | PPM | XRF | |
| SR | 528 | PPM | XRF | |
| PB | 16 | PPM | XRF | |
| TH | 14 | PPM | XRF | |
| Y | 23 | PPM | XRF | |
| LA | 38 | PPM | XRF | |
| CE | 79 | PPM | XRF |