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- W1657221803 abstract "One of the characteristic features of CK chondrites is the wide compositional range displayed by feldspar grains in matrix relative to the narrow range of compositions exhibited by the highly equilibrated olivines and pyroxenes. Recently, it was suggested that these heterogeneous feldspar compositions may have been strongly influenced by shock metamorphisms. It is shown that the apparent range of feldspar compositions in Maralinga probably results from annealing during parent body thermal metamorphism rather than shock. The majority of matrix feldspars in Maralinga are typically 50 microns in size and are compositionally zoned, with oligoclase cores (approximately An40) and bytownite rims (approximately An80). The contact between core and rim is sharp and abrupt and is readily observed in backscattered scanning electron microscopy (SEM) images." @default.
- W1657221803 created "2016-06-24" @default.
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- W1657221803 date "1993-01-01" @default.
- W1657221803 modified "2023-09-28" @default.
- W1657221803 title "Heterogeneous plagioclase compositions in the Maralinga CK4 chondrite" @default.
- W1657221803 hasPublicationYear "1993" @default.
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