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Abstract
Rb 87-Sr 87 age measurements were carried out on large biotite crystals from three granitic pegmatites and a basic charnockite lens occurring near Lützow—Holm Bay, Queen Maud Land. The mean age obtained (∼ 515 million years) probably refers to the last major metamorphic episode in this region. The age data are also significant for the interpretation of palaeomagnetic results reported from this area.
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