Coexisting cummingtonite and aluminous hornblende from garnet amphibolite, Boehls Butte area, Idaho, USA
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
Electron microprobe analyses of green hornblende and coexisting cummingtonite from garnet amphibolite show identical Fe/Mg ratios ( = 0.9). Cummingtonite is iron-magnesium silicate with very little calcium and aluminum and practically no alkalies. In contrast, the hornblende has 1.5 tetrahedral Al, 0.9 octahedral Al and a considerable amount of Ca and alkalies. Comparison with the hornblendes from the Sierra Nevada shows a higher relative amount of tschemakite molecule in the hornblendes from Idaho where pressures during the recrystallization were higher.
Suggested Citation
Hietanen, A., 1973, Coexisting cummingtonite and aluminous hornblende from garnet amphibolite, Boehls Butte area, Idaho, USA: LITHOS, v. 6, no. 3, p. 261-264, https://doi.org/10.1016/0024-4937(73)90086-8.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Coexisting cummingtonite and aluminous hornblende from garnet amphibolite, Boehls Butte area, Idaho, USA |
| Series title | LITHOS |
| DOI | 10.1016/0024-4937(73)90086-8 |
| Volume | 6 |
| Issue | 3 |
| Year Published | 1973 |
| Language | English |
| Publisher | Elsevier |
| Description | 4 p. |
| First page | 261 |
| Last page | 264 |
| Country | United States |
| State | Idaho |