| Reference Type | Journal (article/letter/editorial) |
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| Title | Pyrometamorphic breakdown of cordierite - muscovite intergrowths |
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| Journal | Mineralogical Magazine |
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| Authors | Grapes, R. H. | Author |
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| Year | 2003 (August) | Volume | 67 |
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| Issue | 4 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/0026461036740124Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 243454 | Long-form Identifier | mindat:1:5:243454:8 |
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| GUID | 0 |
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| Full Reference | Grapes, R. H. (2003) Pyrometamorphic breakdown of cordierite - muscovite intergrowths. Mineralogical Magazine, 67 (4) 653-663 doi:10.1180/0026461036740124 |
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| Plain Text | Grapes, R. H. (2003) Pyrometamorphic breakdown of cordierite - muscovite intergrowths. Mineralogical Magazine, 67 (4) 653-663 doi:10.1180/0026461036740124 |
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| Abstract/Notes | AbstractBackscattered electron imaging of cordierite-muscovite intergrowths near the margin of a schist xenolith in trachytic tephra of the Wehr Volcano, East Eifel area, Germany, show that they have undergone disequilibrium melting to form spinel + biotite + sillimanite/?mullite + peraluminous melt. Textures indicate that in the initial stage of reaction, spinel, biotite and sillimanite/?mullite formed with melt produced in cordierite and spinel + ?mullite with melt after muscovite, providing evidence of two different reaction pathways. Fe-Mg distributions between biotite/spinel, cordierite/spinel, cordierite/ biotite suggest a melting temperature of ∼770°C, implying overstepping of various calculated and experimentally determined mineral breakdown curves of between 30 and 170°C during short-term heating before the xenolith was quenched on eruption. |
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