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Sample RH-CH-901
NavDat sample number 12100 · RHYOLITE
Sample
| Sample ID | RH-CH-901 |
|---|
| Rock name | RHYOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | crystal-poor rhyolite lava or possible sill with autobrecciated base |
|---|
Location
| Latitude | 44.4833 |
|---|
| Longitude | -114.65 |
|---|
| Location | Challis volcanic field; ridge between Tenmile and Eightmile Creeks, NE part of Custer graben |
|---|
| State / province | Idaho |
|---|
| Volcanic field | Challis volcanic field |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 46.5 |
|
44.8 |
48.2 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 77.9 | | WT% | XRF |
| AL2O3 | 11.1 | | WT% | XRF |
| FE2O3 | 1.32 | | WT% | XRF |
| FEO | 0.12 | | WT% | XRF |
| MGO | 0 | | WT% | XRF |
| CAO | 0.13 | | WT% | XRF |
| NA2O | 3.53 | | WT% | XRF |
| K2O | 4.56 | | WT% | XRF |
| H2O_PLUS | 0.22 | | WT% | XRF |
| H2O_MINUS | 0.2 | | WT% | XRF |
| TIO2 | 0.1 | | WT% | XRF |
| P2O5 | 0 | | WT% | XRF |
| MNO | 0 | | WT% | XRF |
| CO2 | 0 | | WT% | XRF |
| TOTAL | 99.18 | | WT% | XRF |
