Sample 87/3-9
NavDat sample number 41080 · RHYOLITE
Sample
| Sample ID | 87/3-9 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 27.5 |
|---|---|
| Longitude | -107.83 |
| Location | El Divisadero |
| State / province | Chihuahua |
| Country | MEXICO |
| Location comment | W Chihuahua |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 32 | 28.8 | 35.2 |
Analyses
Whole Rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 72.1 | WT% | XRF | |
| TIO2 | 0.45 | WT% | XRF | |
| AL2O3 | 14.6 | WT% | XRF | |
| FEO | 1.4 | WT% | XRF | |
| MNO | 0.06 | WT% | XRF | |
| MGO | 0.39 | WT% | XRF | |
| CAO | 1.62 | WT% | XRF | |
| NA2O | 4.4 | WT% | XRF | |
| K2O | 4.3 | WT% | XRF | |
| P2O5 | 0.05 | WT% | XRF | |
| RB | 159 | PPM | XRF | |
| SR | 128 | PPM | XRF | |
| Y | 47 | PPM | XRF | |
| ZR | 276 | PPM | XRF | |
| NB | 20 | PPM | XRF | |
| CO | 8 | PPM | XRF | |
| LA | 36.8 | PPM | INAA | |
| CE | 84.2 | PPM | INAA | |
| SM | 7.9 | PPM | INAA | |
| EU | 1.83 | PPM | INAA | |
| TB | 1.44 | PPM | INAA | |
| DY | 6.11 | PPM | INAA | |
| YB | 4.36 | PPM | INAA | |
| SC | 6.5 | PPM | INAA | |
| CS | 3.52 | PPM | INAA | |
| HF | 9.4 | PPM | INAA | |
| BA | 1350 | PPM | INAA | |
| TH | 16.8 | PPM | INAA | |
| SR87_SR86 | 0.70696 | MS | ||
| SR87_SR86 | 0.70543 | MS | ||
| ND143_ND144 | 0.512644 | MS |
References
- Albrecht, Achim; Goldstein, Steven L (2000) Effects of basement composition and age on silicic magmas across an accreted terrane-Precambrian crust boundary, Sierra Madre Occidental, Mexico. Journal of South American Earth Sciences, vol.13, no.3, pp.255-273, Jul 2000 doi:10.1016/S0895-9811(00)00014-6