| Reference Type | Journal (article/letter/editorial) |
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| Title | Mantle-derived sapphirine |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Griffin, W. L. | Author |
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| O'Reilly, S. Y. | Author |
| Year | 1986 (December) | Volume | 50 |
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| Issue | 358 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_50/50-358-635.pdf+ |
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| DOI | doi:10.1180/minmag.1986.050.358.08Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3907 | Long-form Identifier | mindat:1:5:3907:3 |
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| GUID | 0 |
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| Full Reference | Griffin, W. L., O'Reilly, S. Y. (1986) Mantle-derived sapphirine. Mineralogical Magazine, 50 (358) 635-640 doi:10.1180/minmag.1986.050.358.08 |
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| Plain Text | Griffin, W. L., O'Reilly, S. Y. (1986) Mantle-derived sapphirine. Mineralogical Magazine, 50 (358) 635-640 doi:10.1180/minmag.1986.050.358.08 |
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| In | (1986, December) Mineralogical Magazine Vol. 50 (358) Mineralogical Society |
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| Abstract/Notes | AbstractA xenolith from the Delegate breccia pipe (New South Wales, Australia) contains sapphirine in equilibrium with aluminous clinopyroxene, garnet, and plagioclase (An48). This unusual assemblage probably developed from a clinopyroxene (±spinel ± plagioclase) cumulate during cooling from > 1400°C to c. 1000°C at pressures near 15 kbar. The sapphirine is close to the 7:9:3 composition, suggesting that bulk composition is more important than P-T conditions in determining the stoichiometry of natural sapphirines. A similar occurrence of sapphirine has also been recorded in mantlederived xenoliths from the Stockdale kimberlite in Kansas. Re-examination of sapphirine granulites from Finero suggests that their primary assemblages and origin may have been similar to those of the Delegate xenolith. Sapphirine is clearly stable under upper-mantle conditions in Ca-Al-Mg-rich bulk compositions. |
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