| Reference Type | Journal (article/letter/editorial) |
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| Title | Phase relations of aenigmatite minerals in a syenitic ejectum, wonchi volcano, Ethiopia |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Gaeta, Mario | Author |
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| Mottana, Annibale | Author |
| Year | 1991 (December) | Volume | 55 |
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| Issue | 381 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_55/55-381-529.pdf+ |
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| DOI | doi:10.1180/minmag.1991.055.381.05Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1763 | Long-form Identifier | mindat:1:5:1763:7 |
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| GUID | 0 |
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| Full Reference | Gaeta, Mario, Mottana, Annibale (1991) Phase relations of aenigmatite minerals in a syenitic ejectum, wonchi volcano, Ethiopia. Mineralogical Magazine, 55 (381) 529-534 doi:10.1180/minmag.1991.055.381.05 |
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| Plain Text | Gaeta, Mario, Mottana, Annibale (1991) Phase relations of aenigmatite minerals in a syenitic ejectum, wonchi volcano, Ethiopia. Mineralogical Magazine, 55 (381) 529-534 doi:10.1180/minmag.1991.055.381.05 |
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| In | (1991, December) Mineralogical Magazine Vol. 55 (381) Mineralogical Society |
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| Abstract/Notes | AbstractWonchi volcano (Ethiopia) is the second locality for wilkinsonite, the new mineral related to aenigmatite via the coupled substitution 2Fe3+ = TiFe2+. Wilkinsonite occurs as relics surrounded by rims of riebeckite and biotite in a syenitic ejectum which also contains microphenocrysts of aenigmatite. The two minerals do not represent an equilibrium pair. They both formed in the magma chamber under plutonic to hypabyssal conditions, but during two following stages of crystallisation separated by a major drop in ƒO2 conditions. |
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