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

Harrison, TimothyBlichert-Toft, JanneMueller, WolfgangAlbarede, FrancisHolden, PeterMojzsis, Stephen2015-12-130036-8075http://hdl.handle.net/1885/80135The 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,Keywords: Earth (planet); Hafnium; Lutetium; Reservoirs (water); Continental crust; Heterogeneous hadean hafnium; Hypothesis; Geochemistry; hafnium; zirconium; continental crust; crustal evolution; geochemistry; hafnium; Precambrian; article; astronomy; Australia;Heterogeneous Hadean Hafnium: Evidence of Continental Crust at 4.4 to 4.5 Ga200510.1126/science.11179262015-12-11