K-Ar dates for plutons from the Iron Mountain and Sturgill Peak areasof western Idaho
Henricksen, Thomas A; Skurla, Steven J; Field, Cyrus W (1972) K-Ar dates for plutons from the Iron Mountain and Sturgill Peak areasof western Idaho. Isochron/West, vol.5, pp.13-16, 1972
| Authors | Henricksen, Thomas A; Skurla, Steven J; Field, Cyrus W |
|---|---|
| Year | 1972 |
| Title | K-Ar dates for plutons from the Iron Mountain and Sturgill Peak areasof western Idaho |
| Source | Isochron/West, vol.5, pp.13-16, 1972 |
| ISSN | 0099-6882 |
| GeoRef | 1973-010262 |
| Keywords | absolute age; dates; geochronology; Idaho; igneous rocks; intrusions;Iron Mountain Quartz Diorite; K/Ar; Mann Creek Granodiorite; Mesozoic;plutons; United States; west |
Abstract
Iron Mountain quartz diorite dated 200 m.y., Mann Creek granodiorite120 m.y., interpreted as two separate episodes of Mesozoic plutonism
2 samples from this reference
| Sample | Rock name | Major | Trace | Isotope |
|---|---|---|---|---|
| YU-I-161 | Diorite | |||
| YU-SS-60-A | Granodiorite |