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Source-controlled K isotope variations in diverse granitic rocks
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DOI：10.1016/j.lithos.2026.108686.png)
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Abstract
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• NE Tibetan Plateau granites show δ41K from −0.686‰ to −0.148‰. • S-type granites have light K from sedimentary sources. • I-type and adakitic granites have heavier K from igneous protoliths. • Residual phases during partial melting drive K isotope-Sr/Y trends. • Source heterogeneity first-order controls K isotope diversity.
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