| Reference Type | Journal (article/letter/editorial) |
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| Title | Deerite from Papua New Guinea |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Worthing, M. A. | Author |
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| Year | 1987 (December) | Volume | 51 |
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| Issue | 363 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_51/51-363-689.pdf+ |
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| DOI | doi:10.1180/minmag.1987.051.363.09Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1443 | Long-form Identifier | mindat:1:5:1443:8 |
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| GUID | 0 |
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| Full Reference | Worthing, M. A. (1987) Deerite from Papua New Guinea. Mineralogical Magazine, 51 (363) 689-693 doi:10.1180/minmag.1987.051.363.09 |
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| Plain Text | Worthing, M. A. (1987) Deerite from Papua New Guinea. Mineralogical Magazine, 51 (363) 689-693 doi:10.1180/minmag.1987.051.363.09 |
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| In | (1987, December) Mineralogical Magazine Vol. 51 (363) Mineralogical Society |
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| Abstract/Notes | AbstractDeerite in two meta-ironstones from Papua New Guinea coexists with quartz-albite-riebeckite-dannemorite-magnetite-spessartine-stilpnomelane-apatite-Ca/Mn carbonates and quartz-albite-crossite-ilmenite-spessartine-stilpnomelane-apatite respectively. Geochemical comparisons in the system FeO-MnO-MgO suggest that the P.N.G. deerites most closely resemble Franciscan types. However, the metamorphic assemblages more closely resemble Alpine types indicating metamorphism close to the lower P-T limit of deerite stability. Consistent differences in whole-rock and internal oxidation ratios between the two specimens suggest that fo2 may be important in determining deerite chemistry. A redox equation is suggested linking changes in deerite internal oxidation ratio with variable OH content. |
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