Vaniman, David (1978) Crystallization history of sector-zoned microcline megacrysts from the Godani Valley pluton, Nigeria. Mineralogical Magazine, 42 (324) 443-451 doi:10.1180/minmag.1978.042.324.06
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Crystallization history of sector-zoned microcline megacrysts from the Godani Valley pluton, Nigeria | ||
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
| Authors | Vaniman, David | Author | |
| Year | 1978 (December) | Volume | 42 |
| Issue | 324 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_42/42-324-443.pdf+ | ||
| DOI | doi:10.1180/minmag.1978.042.324.06Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 2958 | Long-form Identifier | mindat:1:5:2958:6 |
| GUID | 0 | ||
| Full Reference | Vaniman, David (1978) Crystallization history of sector-zoned microcline megacrysts from the Godani Valley pluton, Nigeria. Mineralogical Magazine, 42 (324) 443-451 doi:10.1180/minmag.1978.042.324.06 | ||
| Plain Text | Vaniman, David (1978) Crystallization history of sector-zoned microcline megacrysts from the Godani Valley pluton, Nigeria. Mineralogical Magazine, 42 (324) 443-451 doi:10.1180/minmag.1978.042.324.06 | ||
| In | (1978, December) Mineralogical Magazine Vol. 42 (324) Mineralogical Society | ||
| Abstract/Notes | SummarySector-zoning is brought out by mineral inclusions (plagioclase, biotite, hornblende, sphene, and apatite) in 2 to 5 cm microcline megacrysts of the Godani Valley pluton, Nigeria. The inclusions are concentrated in the megacryst rims beneath the faces {110} and {20}; the megacryst cores are not sector-zoned. Comparison with other occurrences (Portugal and Czechoslovakia) shows that this type of sector-zoning is not controlled by growth rate. Chemical sector-zoning does not occur in the Godani megacrysts. Growth from magma is proposed, with preference for inclusions on faces at a high angle to the feldspar a-chain. A superficially similar type of sector-zoning occurs in microcline megacrysts of both pluton and wall rock at Papoose Flat, California, suggesting that this feature can be generated either by growth from magma or by replacement. | ||
See Also
These are possibly similar items as determined by title/reference text matching only.
