| Reference Type | Journal (article/letter/editorial) |
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| Title | Reflected-light microscopy of uraniferous bitumens |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Eakin, P. A. | Author |
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| Gize, A. P. | Author |
| Year | 1992 (March) | Volume | 56 |
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| Issue | 382 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_56/56-382-101.pdf+ |
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| DOI | doi:10.1180/minmag.1992.056.382.11Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1789 | Long-form Identifier | mindat:1:5:1789:7 |
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| GUID | 0 |
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| Full Reference | Eakin, P. A., Gize, A. P. (1992) Reflected-light microscopy of uraniferous bitumens. Mineralogical Magazine, 56 (382) 85-99 doi:10.1180/minmag.1992.056.382.11 |
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| Plain Text | Eakin, P. A., Gize, A. P. (1992) Reflected-light microscopy of uraniferous bitumens. Mineralogical Magazine, 56 (382) 85-99 doi:10.1180/minmag.1992.056.382.11 |
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| In | (1992, March) Mineralogical Magazine Vol. 56 (382) Mineralogical Society |
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| Abstract/Notes | AbstractUraniferous bitumens from Great Britain, Scandinavia and South Africa have been studied by oilimmersion reflected-light microscopy and categorised into those formed either by replacement of preexisting uraninite and pitchblende or by complexation/reduction mechanisms in pre-existing hydrocarbons. The former are characterised by displaying normal replacive textures, and containing high concentrations of non-mineral-bound uranium, or later, occasionally exotic, uraniferous fracturefilling phases. Uraniferous bitumens formed during complexation/reduction reactions display monotonous mineralogies and ordered mineral-inclusion distributions.Radiolytic alteration of uraniferous bitumens induces both chemical and mechanical alteration. Early alteration is marked by the generation of mobile hydrocarbons during 'cracking reactions' with subsequent within-sample migration to form globular bitumens and dendritic interspersions of mineralrich and -poor uraniferous bitumen. Mobile hydrocarbons may act as lubricants during mechanical deformation. Advanced organic alteration is characterised by well-documented increased reflectance around uraniferous grains, and by fracturing of the bitumens. |
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