| Abstract: | Greenish black tourmaline occurs in small localized masses in the Boehls Butte layered, two-plagioclase anorthosite. Chemical analysis by S. Neil gave SiO2 36.6, TiO2 0.34, B2O3 10.7, Al2O3 33.6, V2O3 0.24, FeO 4.16, MnO 0.09, MgO 8.04, CaO 0.98, Na2O 1.74, F 0.03, H2O+ 3.06, less O = F 0.01, = 99.57; epsilon (pale reddish brown) 1.62, omega (brownish green) 1.647; a 15.9425, c 7.1883 A.-R.A.H. |
| Genre: | Article |
| ProdID: | 70014770 |
| Citation Author: | Hietanen, A. |
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| Citation End Page: | 95 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of Finland, Bulletin |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A.; 1987; Article; Journal; Geological Society of Finland, Bulletin; Hietanen, A. |
| Citation Start Page: | 91 |
| Citation Volume: | 59 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Tourmaline (dravite) from the Boehls Butte anorthosite, Idaho, U.S.A.; 1987; Article; Journal; Geological Society of Finland, Bulletin; Hietanen, A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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