Sample 87/3-16
NavDat sample number 41083 · RHYOLITE
Sample
| Sample ID | 87/3-16 |
|---|---|
| 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 |
|---|---|---|---|---|---|
| 30 | 27 | 33 |
Analyses
Whole Rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 71.2 | WT% | XRF | |
| TIO2 | 0.59 | WT% | XRF | |
| AL2O3 | 15.2 | WT% | XRF | |
| FEO | 4 | WT% | XRF | |
| MNO | 0.07 | WT% | XRF | |
| MGO | 1.66 | WT% | XRF | |
| CAO | 4.4 | WT% | XRF | |
| NA2O | 2.7 | WT% | XRF | |
| K2O | 2.1 | WT% | XRF | |
| P2O5 | 0.15 | WT% | XRF | |
| RB | 72 | PPM | XRF | |
| SR | 589 | PPM | XRF | |
| Y | 24 | PPM | XRF | |
| ZR | 154 | PPM | XRF | |
| NB | 11 | PPM | XRF | |
| CO | 15 | PPM | XRF | |
| LA | 29.5 | PPM | INAA | |
| CE | 41 | PPM | INAA | |
| ND | 26 | PPM | INAA | |
| SM | 6 | PPM | INAA | |
| EU | 1.18 | PPM | INAA | |
| TB | 0.64 | PPM | INAA | |
| DY | 4.1 | PPM | INAA | |
| YB | 2.85 | PPM | INAA | |
| LU | 0.37 | PPM | INAA | |
| SC | 9 | PPM | INAA | |
| CS | 4.1 | PPM | INAA | |
| HF | 4.5 | PPM | INAA | |
| BA | 780 | PPM | INAA | |
| TH | 11.4 | PPM | INAA | |
| U | 4.5 | PPM | INAA | |
| PB | 13.8 | PPM | MS | |
| SR87_SR86 | 0.7049 | MS | ||
| SR87_SR86 | 0.70474 | MS | ||
| ND143_ND144 | 0.512557 | MS | ||
| ND143_ND144_INITIAL | 0.51253 | 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