| Reference Type | Journal (article/letter/editorial) |
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| Title | Mineralogy and cryptic layering of the Kunene anorthosite complex of SW Angola and Namibia |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Silva, Zenaide C. G. | Author |
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| Year | 1992 (September) | Volume | 56 |
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| Issue | 384 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_56/56-384-319.pdf+ |
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| DOI | doi:10.1180/minmag.1992.056.384.03Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1835 | Long-form Identifier | mindat:1:5:1835:1 |
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| GUID | 0 |
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| Full Reference | Silva, Zenaide C. G. (1992) Mineralogy and cryptic layering of the Kunene anorthosite complex of SW Angola and Namibia. Mineralogical Magazine, 56 (384) 319-327 doi:10.1180/minmag.1992.056.384.03 |
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| Plain Text | Silva, Zenaide C. G. (1992) Mineralogy and cryptic layering of the Kunene anorthosite complex of SW Angola and Namibia. Mineralogical Magazine, 56 (384) 319-327 doi:10.1180/minmag.1992.056.384.03 |
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| In | (1992, September) Mineralogical Magazine Vol. 56 (384) Mineralogical Society |
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| Abstract/Notes | AbstractThe gabbro-anorthosite complex of SW Angola and Namibia (Kunene Complex) is dominated by anorthosite-troctolite cumulates. Other broadly gabbroic rock types are subordinate. An-rich plagioclase (max. An85) and Fo-rich olivine (max. Fo79) are common in the western area of the complex with plagioclase becoming gradually less anorthitic (min. An45) and olivine less forsteritic (min. Fo62) toward the east. This cryptic change is more pronounced in the northern half of the complex where rocks are darker, fresh, and the rhythmic layering is also more conspicuous. Within the white 'massive' anorthosite type, which is largely restricted to the southern half of the intrusion, cryptic layering is less pronounced. Textures indicate that rocks cooled very slowly and the co-existing mineral compositions indicate re-equilibration to usually low temperatures. |
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