Barium isotopes can be significantly fractionated during granitic magma differentiation. Albite granites have 138134 Ba from 0.50 to 0.95, higher than that of K-feldspar granites 0.14 to 0.16. K-feldspar 0.23 to 0.01 and biotite 0.731.92 have lower and higher 138134 Ba than the whole-rocks.
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