The origin of decoupled Hf-Nd isotope compositions in Eoarchean rocks from southern West Greenland
作者： J. Elis Hoffmann , Carsten Münker , Ali Polat , Minik T. Rosing , Toni Schulz
DOI: 10.1016/J.GCA.2011.08.018
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摘要: Radiogenic isotope compositions of Hf and Nd are typically coupled in Phanerozoic and Proterozoic mafic rocks due to a similar behaviour of Lu–Hf and Sm–Nd during mantle melting. Eoarchean rocks, for instance those from southern West Greenland, exhibit an apparent decoupling of Hf and Nd isotope compositions. This apparent decoupling may either indicate metamorphic disturbance or, alternatively, mirror early differentiation processes in the silicate Earth. To evaluate the issue, we performed combined …
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