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- W2043455422 abstract "Abstract Specimens collected from a small lens of phlogopite-rich rock in the granulite-facies terrain of the Arunta Block, central Australia, have unusual bulk compositions and mineral assemblages. One sample consists of phlogopite enclosing blue spinel ( mg 96) with minute granules of corundum and sapphirine at the margins; a second of phlogopite enclosing porphyroblasts of corundum and peraluminous sapphirine. In the first the sapphirine is close to the 7 : 9 : 3 composition; in the other it is markedly peraluminous, e.g. (Mg 1.628 Fe 0.028 )Al 4.714 Si 0.636 O 10 , intermediate between the 7 : 9 : 3 and 3 : 5 : 1 members. The texture suggests that this sapphirine is a stable phase in equilibrium with eastonitic phlogopite and corundum. The very potassic, very magnesian bulk composition of the rocks is attributed to potassium metasomatism of a protolith consisting of magnesian chlorite and quartz." @default.
- W2043455422 created "2016-06-24" @default.
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- W2043455422 date "1987-09-01" @default.
- W2043455422 modified "2023-09-25" @default.
- W2043455422 title "Peraluminous sapphirine from the Aileron district, Arunta Block, central Australia" @default.
- W2043455422 cites W617353587 @default.
- W2043455422 doi "https://doi.org/10.1180/minmag.1987.051.361.07" @default.
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