 |
VOOZH | about |
|
VOOZH | about |
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Zirconolite, chevkinite and other rare earth minerals from nepheline syenites and peralkaline granites and syenites of the Chilwa Alkaline Province, Malawi | ||
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
| Authors | Platt, R. G. | Author | |
| Wall, F. | Author | ||
| Williams, C. T. | Author | ||
| Woolley, A. R. | Author | ||
| Year | 1987 (June) | Volume | 51 |
| Issue | 360 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_51/51-360-253.pdf+ | ||
| DOI | doi:10.1180/minmag.1987.051.360.07Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 1378 | Long-form Identifier | mindat:1:5:1378:3 |
| GUID | 0 | ||
| Full Reference | Platt, R. G., Wall, F., Williams, C. T., Woolley, A. R. (1987) Zirconolite, chevkinite and other rare earth minerals from nepheline syenites and peralkaline granites and syenites of the Chilwa Alkaline Province, Malawi. Mineralogical Magazine, 51 (360) 253-263 doi:10.1180/minmag.1987.051.360.07 | ||
| Plain Text | Platt, R. G., Wall, F., Williams, C. T., Woolley, A. R. (1987) Zirconolite, chevkinite and other rare earth minerals from nepheline syenites and peralkaline granites and syenites of the Chilwa Alkaline Province, Malawi. Mineralogical Magazine, 51 (360) 253-263 doi:10.1180/minmag.1987.051.360.07 | ||
| In | (1987, June) Mineralogical Magazine Vol. 51 (360) Mineralogical Society | ||
| Abstract/Notes | AbstractFive rare earth-bearing minerals found in rocks of the Chilwa Alkaline Province, Malawi, are described. Zirconolite, occurring in nepheline syenite, is unusual in being optically zoned, and microprobe analyses indicate a correlation of this zoning with variations in Si, Ca, Sr, Th, U, Fe, Nb and probably water; it is argued that this zoning is a hydration effect. A second compositional zoning pattern, neither detectable optically nor affected by the hydration, is indicated by variations in Th, Ce and Y such that, although total REE abundances are similar throughout, there appears to have been REE fractionation during zirconolite growth from relatively heavy-REE and Th-enrichment in crystal cores to light-REE enrichment in crystal rims.Chevkinite is an abundant mineral in the large granite quartz syenite complexes of Zomba and Mulanje, and analyses are given of chevkinites from these localities. There is little variation in composition within each complex, and only slight differences between them; they are all typically light-REE-enriched. The Mulanje material was shown by X-ray diffraction to be chevkinite and not the dimorph perrierite, but chemical arguments are used in considering the Zomba material to be the same species. Other rare earth minerals identified are monazite, fluocerite and bastnäsite. These are briefly described and microprobe analyses presented. | ||
| Locality | Citation Details |
|---|---|
| Mlanje Massif, Mulanje, Southern Region, Malawi | |
| Zomba-Malosa Complex, Southern Region, Malawi |
These are possibly similar items as determined by title/reference text matching only.
