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- W2045593199 endingPage "1910" @default.
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- W2045593199 abstract "The oldest rocks—3.85 billion years old—from southwest Greenland have coupled neodymium-142 excesses (from decay of now-extinct samarium-146; half-life, 103 million years) and neodymium-143 excesses (from decay of samarium-147; half-life, 106 billion years), relative to chondritic meteorites, that directly date the formation of chemically distinct silicate reservoirs in the first 30 million to 75 million years of Earth history. The differences in 142 Nd signatures of coeval rocks from the two most extensive crustal relicts more than 3.6 billion years old, in Western Australia and southwest Greenland, reveal early-formed large-scale chemical heterogeneities in Earth's mantle that persisted for at least the first billion years of Earth history. Temporal variations in 142 Nd signatures track the subsequent incomplete remixing of very-early-formed mantle chemical domains." @default.
- W2045593199 created "2016-06-24" @default.
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- W2045593199 date "2007-12-21" @default.
- W2045593199 modified "2023-09-25" @default.
- W2045593199 title "Coupled <sup>142</sup> Nd- <sup>143</sup> Nd Isotopic Evidence for Hadean Mantle Dynamics" @default.
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- W2045593199 doi "https://doi.org/10.1126/science.1145928" @default.
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