Sample 101
NavDat sample number 11365 · TRACHYTE
Sample
| Sample ID | 101 |
|---|---|
| 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 | 42.7225 |
|---|---|
| Longitude | -107.305 |
| 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 | 59.98 | WT% | XRF | |
| AL2O3 | 18.63 | WT% | XRF | |
| FE2O3 | 2.51 | WT% | XRF | |
| FEO | 1.54 | WT% | TIT | |
| CAO | 3.69 | WT% | XRF | |
| MGO | 0.85 | WT% | XRF | |
| NA2O | 6.08 | WT% | XRF | |
| K2O | 5 | WT% | XRF | |
| TIO2 | 0.6 | WT% | XRF | |
| MNO | 0.16 | WT% | XRF | |
| P2O5 | 0.14 | WT% | XRF | |
| H2O | 1.13 | WT% | PENFIELD | |
| TOTAL | 100.31 | WT% | XRF | |
| RB | 105 | PPM | XRF | |
| SR | 1513 | PPM | XRF | |
| Y | 29 | PPM | XRF | |
| ZR | 421 | PPM | XRF | |
| LA | 62 | PPM | XRF | |
| CE | 128 | PPM | NAA | |
| ND | 64 | PPM | NAA | |
| SM | 12 | PPM | NAA | |
| EU | 2.9 | PPM | NAA | |
| TB | 2 | PPM | NAA | |
| DY | 6 | PPM | NAA | |
| YB | 3 | PPM | NAA | |
| LU | 0.4 | PPM | NAA | |
| LA | 63 | PPM | NAA | |
| U | 4.2 | PPM | NAA | |
| TH | 16 | PPM | NAA | |
| CU | 14 | PPM | AAS | |
| CR | 21 | PPM | AAS | |
| NI | 44 | PPM | AAS | |
| ZN | 111 | PPM | AAS |