Sample 86
NavDat sample number 11352 · TRACHYTE
Sample
| Sample ID | 86 |
|---|---|
| Rock name | TRACHYTE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | porphyritic; phenocrysts form flow foliation; holocrystalline matrix of anorthoclase-Na sanidine, clinopyroxene, and magnetite; phenocrysts are feldspar, amphibole, pyroxene, magnetite-ulvospinel, and minor biotite |
Location
| Latitude | 42.7267 |
|---|---|
| Longitude | -107.327 |
| Location | Rattlesnake Hills |
| State / province | Wyoming |
| Volcanic field | alkali trachyte |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 43.6 | 41.4 | 46.6 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 58.1 | WT% | XRF | |
| AL2O3 | 17.58 | WT% | XRF | |
| FE2O3 | 3.23 | WT% | XRF | |
| FEO | 2.12 | WT% | TIT | |
| CAO | 4.67 | WT% | XRF | |
| MGO | 1.62 | WT% | XRF | |
| NA2O | 5.88 | WT% | XRF | |
| K2O | 4.83 | WT% | XRF | |
| TIO2 | 0.79 | WT% | XRF | |
| MNO | 0.16 | WT% | XRF | |
| P2O5 | 0.31 | WT% | XRF | |
| H2O | 1.34 | WT% | PENFIELD | |
| TOTAL | 100.63 | WT% | XRF | |
| RB | 94 | PPM | XRF | |
| SR | 1560 | PPM | XRF | |
| Y | 30 | PPM | XRF | |
| ZR | 387 | PPM | XRF | |
| LA | 63 | PPM | XRF | |
| CE | 120 | PPM | NAA | |
| ND | 50 | PPM | NAA | |
| SM | 11 | PPM | NAA | |
| EU | 3.7 | PPM | NAA | |
| TB | 2 | PPM | NAA | |
| DY | 6 | PPM | NAA | |
| YB | 3 | PPM | NAA | |
| LU | 0.3 | PPM | NAA | |
| LA | 63 | PPM | NAA | |
| U | 3.8 | PPM | NAA | |
| TH | 15 | PPM | NAA | |
| CU | 22 | PPM | AAS | |
| CR | 33 | PPM | AAS | |
| NI | 71 | PPM | AAS | |
| ZN | 104 | PPM | AAS |