Heterogeneous Hadean Hafnium: Evidence of Continental Crust at 4.4 to 4.5 Ga

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Harrison, Timothy
Blichert-Toft, Janne
Mueller, Wolfgang
Albarede, Francis
Holden, Peter
Mojzsis, Stephen

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American Association for the Advancement of Science

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The long-favored paradigm for the development of continental crust is one of progressive growth beginning at ∼4 billion years ago (Ga). To test this hypothesis, we measured initial176Hf/177Hf values of 4.01- to 4.37-Ga detrital zircons from Jack Hills,

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Science

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2037-12-31