← Search
Sample 87-7
NavDat sample number 21559 · ANDESITE
Sample
| Sample ID | 87-7 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
Location
| Latitude | 44.0801 |
|---|
| Longitude | -114.168 |
|---|
| Location | west bank of Lake Creek |
|---|
| State / province | Idaho |
|---|
| Volcanic field | Challis Volcanics |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
| 45 |
|
40 |
51 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
| SIO2 | 57.61 | | WT% | XRF |
| TIO2 | 0.71 | | WT% | XRF |
| AL2O3 | 13.83 | | WT% | XRF |
| FE2O3T | 7.32 | | WT% | XRF |
| MNO | 0.12 | | WT% | XRF |
| MGO | 5.46 | | WT% | XRF |
| CAO | 6.27 | | WT% | XRF |
| NA2O | 2.85 | | WT% | XRF |
| K2O | 3.6 | | WT% | XRF |
| P2O5 | 0.34 | | WT% | XRF |
| LOI | 2.32 | | WT% | XRF |
| TOTAL | 100.43 | | WT% | XRF |
| RB | 118 | | PPM | XRF |
| SR | 671 | | PPM | XRF |
| BA | 1529 | | PPM | XRF |
| Y | 16 | | PPM | XRF |
| ZR | 187 | | PPM | XRF |
| V | 125 | | PPM | XRF |
| NI | 96 | | PPM | XRF |
| CR | 290 | | PPM | XRF |
| LA | 37 | | PPM | MS |
| CE | 70.8 | | PPM | MS |
| PR | 7.41 | | PPM | MS |
| ND | 29.8 | | PPM | MS |
| SM | 5.52 | | PPM | MS |
| EU | 1.41 | | PPM | MS |
| GD | 4.34 | | PPM | MS |
| HO | 0.54 | | PPM | MS |
| ER | 1.35 | | PPM | MS |
| YB | 1.18 | | PPM | MS |
| U | 4.08 | | PPM | MS |
| TH | 14.3 | | PPM | MS |
| PB | 20.9 | | PPM | MS |
| NB | 12.4 | | PPM | MS |
| HF | 4.2 | | PPM | MS |
| CS | 2.1 | | PPM | MS |
| W | 1.8 | | PPM | MS |
| MO | 1.4 | | PPM | MS |
| PB206_PB204 | 18.338 | | | TIMS |
| PB207_PB204 | 15.591 | | | TIMS |
| PB208_PB204 | 38.888 | | | TIMS |
References
- Norman, Marc D; Mertzman, Stanley A (1991) Petrogenesis of Challis Volcanics from central and southwestern Idaho;trace element and Pb isotopic evidence. Journal of Geophysical Research, B, Solid Earth and Planets, vol.96,no.8, pp.13,279-13,293, 30 Jul 1991 doi:10.1029/91JB00285