| Reference Type | Journal (article/letter/editorial) |
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| Title | Calc-aluminous insets in olivine of the Sharps chondrite |
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| Journal | Mineralogical Magazine |
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| Authors | Dodd, R. T. | Author |
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| Year | 1971 (December) | Volume | 38 |
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| Issue | 296 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_38/38-296-451.pdf+ |
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| DOI | doi:10.1180/minmag.1971.038.296.07Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6503 | Long-form Identifier | mindat:1:5:6503:4 |
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| GUID | 0 |
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| Full Reference | Dodd, R. T. (1971) Calc-aluminous insets in olivine of the Sharps chondrite. Mineralogical Magazine, 38 (296) 451-458 doi:10.1180/minmag.1971.038.296.07 |
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| Plain Text | Dodd, R. T. (1971) Calc-aluminous insets in olivine of the Sharps chondrite. Mineralogical Magazine, 38 (296) 451-458 doi:10.1180/minmag.1971.038.296.07 |
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| In | (1971, December) Mineralogical Magazine Vol. 38 (296) Mineralogical Society |
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| Abstract/Notes | SummaryA 250 µm olivine crystal in Sharps contains 1 to 5 µm insets identified by microprobe analysis as ferroan monticellite, spinel, and fassaite with average compositions: olivine (host), (Fe0·44Mg1·51Ca0·05) (Si0·99Al0·01)O4; ferroan monticellite, (Ca0·89Fe0·41Mg0·66) (Si1·00Al0·02)O4; spinel, (Fe0·41Mg0·59)(Fe0·063+Cr0·23Al1·69Si0·01Ti0·01)O4; and fassaite, Ca0.96(Fe0·01Mg0·59)(Al0·18Ti0·07Fe0·163+)(Si1·53Al0·47)O6. Textural and experimental data suggest early crystallization of spinel from a calcic olivine melt, exsolution of ferroan monticellite from the host olivine, and reaction of spinel and ferroan monticellite to form fassaite. The severe depletion of alkalies and silica in this crystal suggests it is a residue from vapour fractionation. |
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