| Reference Type | Journal (article/letter/editorial) |
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| Title | Chemical zoning of muscovite from the Ervedosa granite, northern Portugal |
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| Journal | Mineralogical Magazine |
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| Authors | Gomes, M. E. P. | Author |
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| Neiva, A. M. R. | Author |
| Year | 2000 (April) | Volume | 64 |
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| Page(s) | 347-358 | Issue | 2 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/002646100549247Search in ResearchGate |
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| Mindat Ref. ID | 243156 | Long-form Identifier | mindat:1:5:243156:1 |
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| GUID | 9b41913d-76b5-4c30-be9d-c85b65c48d35 |
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| Full Reference | Gomes, M. E. P., Neiva, A. M. R. (2000) Chemical zoning of muscovite from the Ervedosa granite, northern Portugal. Mineralogical Magazine, 64 (2) 347-358 doi:10.1180/002646100549247 |
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| Plain Text | Gomes, M. E. P., Neiva, A. M. R. (2000) Chemical zoning of muscovite from the Ervedosa granite, northern Portugal. Mineralogical Magazine, 64 (2) 347-358 doi:10.1180/002646100549247 |
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| Abstract/Notes | AbstractThe tin-bearing muscovite granite from Ervedosa contains unzoned primary muscovite. This Hercynian S-type granite was hydrothermally altered at the stanniferous quartz vein walls and contains three types of muscovite: (1) very small unzoned muscovite replacing albite; (2) small unzoned hydrothermal muscovite replacing K-feldspar and quartz; and (3) zoned subhedral muscovite.In the zoned muscovite, the core has a composition similar to that of magmatic muscovite from the unaltered granite, while the rim has a composition similar to that of hydrothermal muscovite replacing K-feldspar and quartz in the altered granite. The rim corresponds to a late overgrowth richer in the celadonitic component than the core. Infiltrated mineralizing fluids reacted with biotite and K-feldspar of the unaltered granite. We interpret the rim of muscovite to have precipitated from these solutions. |
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