Reference Type | Journal (article/letter/editorial) |
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Access Rights | Open Access |
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Title | Identiteten til sorte glimmere i biotittserien fra syenittpegmatitter i Langesundsfjordområdet [The Identity of black micas ofthe biotite series from the syenite pegmatites in the Langesundsfjord area] |
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Journal | Norsk Bergverksmuseum Skrift | ISBN | 82-91337-16-0 |
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Authors | Larsen, Alf Olav | Author |
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Year | 1998 | Volume | 14 |
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Page(s) | 5-8 |
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Publisher | Norsk Bergverksmuseum (Norwegian Mining Museum) | Place | Kongsberg, Norway |
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URL | |
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Download URL | http://www.nags.net/Mineralsymposium/1998/Larsen%20(1998a).pdf |
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Languages | Norwegian |
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Classification | Not set | LoC | Not set |
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Mindat Ref. ID | 12987580 | Long-form Identifier | mindat:1:5:12987580:4 |
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GUID | cb63bfa8-ea60-451f-94ce-946092fe9d3e |
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Full Reference | Larsen, Alf Olav (1998) Identiteten til sorte glimmere i biotittserien fra syenittpegmatitter i Langesundsfjordområdet [The Identity of black micas ofthe biotite series from the syenite pegmatites in the Langesundsfjord area]. Norsk Bergverksmuseum Skrift, 14. 5-8 |
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Plain Text | Larsen, Alf Olav (1998) Identiteten til sorte glimmere i biotittserien fra syenittpegmatitter i Langesundsfjordområdet [The Identity of black micas ofthe biotite series from the syenite pegmatites in the Langesundsfjord area]. Norsk Bergverksmuseum Skrift, 14. 5-8 |
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In | Nordrum, Fred Steinar - Ed. (1998) Kongsberg Mineralsymposium 1998. Norsk Bergverksmuseum Skrift Vol. 14. Norsk Bergverksmuseum (Norwegian Mining Museum) |
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Abstract/Notes | Lepidomelane and biotite have previously been used as names for the black micas from the syenite pegmatites in the Oslo Region. Despite the fact that this mica is a main mineral in most of the pegmatite dikes, no modem analyses have been reported on this mineral. New chemical analysis on nine samples from the Langesundsfjord area are reported in this paper. The results show that all the samples are classified as annite, with a high content of Ti and Mn, low content of AI and Fe3+, and a relatively narrow range of Mg/(Mg+Fe2+) values. The micas contain 0.2%-0.5% Li2O. |
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