← Search
Sample s_SH-118
NavDat sample number 16332 · DACITE
Sample
| Sample ID | s_SH-118 |
|---|
| Rock name | DACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | WHITE PUMICE |
|---|
Location
| Latitude | 46.1436 |
|---|
| Longitude | -122.202 |
|---|
| Location | Mount St. Helens |
|---|
| State / province | Washington |
|---|
| Location comment | Castle Creek Unit |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 0 |
|
0 |
0.01 |
Holocene |
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 63.81 | | WT% | XRF |
| TIO2 | 0.62 | | WT% | XRF |
| AL2O3 | 17.46 | | WT% | XRF |
| FEOT | 3.73 | | WT% | XRF |
| CAO | 4.81 | | WT% | XRF |
| MGO | 2.04 | | WT% | XRF |
| MNO | 0.07 | | WT% | XRF |
| K2O | 1.26 | | WT% | XRF |
| NA2O | 4.99 | | WT% | XRF |
| P2O5 | 0.14 | | WT% | XRF |
References
- Rutherford, Malcolm J; Devine, Joseph D (1988) The May 18, 1980, eruption of Mount St. Helens; 3, Stability and chemistry of amphibole in the magma chamber. Journal of Geophysical Research, B, Solid Earth and Planets. 93; 10, Pages 11,949-11,959. 1988. doi:10.1029/JB093iB10p11949
