...Roger H. Mitchell; Ruslan P. Liferovich Abstract Ilmenite-group titanates are relatively common accessory minerals in agpaitic nepheline syenite (lujavrite) in the Pilansberg alkaline complex, South Africa. They crystallized in three generations and form a continuous ecandrewsite – pyrophanite...

...R. P. Liferovich; R. H. Mitchell Abstract The nepheline syenites of the Pilansberg alkaline complex (South Africa) have undergone extensive subsolidus equilibration and alteration with a deuteric Cl- and Na-rich fluid phase. Complex assemblages of secondary minerals result from the replacement...

..., 16: in foyaite, and 17: in “Ledig” foyaite, Pilansberg complex, South Africa. ...

... post-magmatic deuteric alteration (autometasomatic) subsequent to the ortho to late-magmatic event (e.g. Pilansberg Complex). During such alteration the early to late-magmatic minerals reacts with the deuteric fluids and form new mineralogical assemblages. Eudialytes usually form under conditions...

... follows this principle. The distribution of Pt-Fe alloy is in fact a major factor in differentiating the ores in the vicinity (north and south) of the Pilansberg Alkaline Complex from those of the same layers farther along the arcuate strike (northeastern and southeastern horns of the western Bushveld...

... of the proportions of Zn–Mn–Fe (mol.%). Samples 1–3: consecutive generations from lujavrite, Pilansberg sodic peralkaline complex, South Africa, from early ecandrewsite to late pyrophanite ( Mitchell & Liferovich 2004 ); 4 Poços de Caldas lujavrite, Brazil ( in prep. ); 5 kyanite schist, Death Valley...

... owing to their potential to form economic mineral deposits (Ilímaussaq complex, Greenland; Lovozero and Khibina, Kola Peninsula, Russia; Pilansberg, South Africa; Mont Saint Hilaire, Canada; Tamazeght, Morocco) ( Kogarko et al. , 1982 ; Mitchell and Liferovich, 2006 ; Marks et al. , 2011...

... Pilansberg, RSA Mesoproterozoic polyphase complex 40,41 ; unknown parental melt composition Cpx, AGM, ±Amp 42 Nph, Sdl, ±Zeo 42 Major constituent of late-magmatic to hydrothermal assemblages in foid syenites 42;43 ; anhedral, poikilitic EGM crystals of variable size, strongly altered 42,43 Secondary...

..., South Greenland . Geochim. Cosmochim. Acta 68 , 3379 – 3395 . Mitchell , R.H , & Liferovich , R.P. ( 2006 ): Sub-solidus deuteric/hydrothermal alteration of eudialyte in lujavrite from the Pilansberg alkaline complex, South Africa . Lithos 91 , 352 – 372 . Mourtada...

... ; Fleet et al. 2000 ; Zirner et al. 2015 ; Rønsbo 1989 , 2008 ). In the following discussion the compositional variation of apatites from the Gardar Province is compared to that from investigations of (1) alkaline rock suites of the Pilansberg complex (South Africa; Liferovich and Mitchell 2006...