| 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. ?? 1973. |
| Genre: | Article |
| ProdID: | 70010021 |
| Citation Author: | Hietanen, A. |
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| Citation End Page: | 264 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | LITHOS |
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| Citation Number Of Pages: | 4 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Coexisting cummingtonite and aluminous hornblende from garnet amphibolite, Boehls Butte area, Idaho, USA; 1973; Article; Journal; LITHOS; Hietanen, A. |
| Citation Start Page: | 261 |
| Citation Volume: | 6 |
| Citation Year: | 1973 |
| Type: | citation/reference |
| Text: | Coexisting cummingtonite and aluminous hornblende from garnet amphibolite, Boehls Butte area, Idaho, USA; 1973; Article; Journal; LITHOS; Hietanen, A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0024-4937(73)90086-8 |
| Date Other: | Mon, 1 Jan 1973 00:00 -0600 |
| Publisher: | Elsevier |
