Abstract
SAPPHIRINE and quartz have been found together in nature for the first time in granulite collected by I. R. McLeod, of the Australian Bureau of Mineral Resources, from a small nunatak (66° 57′ S, 51° 31′ E) about 42 miles east of Amundsen Bay, Enderby Land, Antarctica. This rock belongs to a gneiss–granulite–charnockite terrain (personal communication from I. R. McLeod), and was called blue quartzite in the field. In thin section it is seen to consist of rutilated quartz, cordierite-quartz intergrowths, sapphirine as grains up to 2 mm long, and accessory sillimanite, garnet, hypersthene, rutile, chlorite, zircon and biotite; the first three constituents make up about 98 per cent of the rock. Another granulite from the same nunatak contains no sapphirine, though it may formerly have done so; it consists of quartz, garnet, sillimanite, orthoclase microperthite with unusually low 2 V (35° to 40°), and accessory rutile, sericite and zircon.
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