Abstract
A precise Sm–Nd age of 2,790±30 Myr and an initial ratio corresponding to ɛNd = +3.4±0.6 has been determined for the Kambalda sequence from the eastern Yilgarn Block of Western Australia. The high initial 143Nd/144Nd implies a long-lived light rare-earth element-depleted (high Sm/Nd) source for the Kambalda volcanics and therefore provides definitive evidence for ancient heterogeneities in the Archaean mantle.
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McCulloch, M., Compston, W. Sm–Nd age of Kambalda and Kanowna greenstones and heterogeneity in the Archaean mantle. Nature 294, 322–327 (1981). https://doi.org/10.1038/294322a0
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DOI: https://doi.org/10.1038/294322a0
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