| Reference Type | Journal (article/letter/editorial) |
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| Title | Petrologic evidence for a rhodochrosite precursor of spessartine in coticules of the Venn-Stavelot Massif, Belgium |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Schreyer, W. | Author |
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| Bernhardt, H.-J. | Author |
| Medenbach, O. | Author |
| Year | 1992 (December) | Volume | 56 |
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| Page(s) | 527-532 | Issue | 385 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_56/56-385-527.pdf+ |
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| DOI | doi:10.1180/minmag.1992.056.385.08Search in ResearchGate |
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| Mindat Ref. ID | 1866 | Long-form Identifier | mindat:1:5:1866:5 |
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| GUID | 89f5acd3-a080-4f73-bc92-449fd1ae0006 |
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| Full Reference | Schreyer, W., Bernhardt, H.-J., Medenbach, O. (1992) Petrologic evidence for a rhodochrosite precursor of spessartine in coticules of the Venn-Stavelot Massif, Belgium. Mineralogical Magazine, 56 (385) 527-532 doi:10.1180/minmag.1992.056.385.08 |
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| Plain Text | Schreyer, W., Bernhardt, H.-J., Medenbach, O. (1992) Petrologic evidence for a rhodochrosite precursor of spessartine in coticules of the Venn-Stavelot Massif, Belgium. Mineralogical Magazine, 56 (385) 527-532 doi:10.1180/minmag.1992.056.385.08 |
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| In | (1992, December) Mineralogical Magazine Vol. 56 (385) Mineralogical Society |
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| Abstract/Notes | AbstractMinute CaMg-bearing rhodochrosite inclusions were discovered in spessartine crystals of small coticule globules enclosed within redschists that form the country rock of the famous coticule bands of Belgium. This points to a former metamorphic reaction relationship between the two minerals, such as rhodochrosite + pyrophyllite = spessartine + quartz + CO2 + H2O. The coexistence of spessartine with Mg-chlorite in the coticule globule could also indicate more complex reactions such as rhodochrosite + sudoite + quartz = spessartine + Mg-chlorite + CO2 + H2O. Our finding casts some doubt on the suggestion by Kramm (1976) that spessartine formed from Mn-montmorillonite in previously glassy volcanic tufts. |
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