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We report Hf isotopic data for over 50 well studied lower crustal samples from three Proterozoic and Phanerozoic regions in southwest Europe, eastern Australia and southern Mexico. We use these data to characterize the Lu-Hf isotopic composition of the lower crust and, in combination with existing Sm-Nd data, to constrain coupled Hf-Nd isotopic behavior and evolution within this reservoir. Although...
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