New Ge isotope data for carbonaceous and enstatite chondrites give a bulk silicate Earth carbonaceous-chondrite fraction of 0.64±0.16, larger than the Zn fraction of 0.29±0.07, indicating late delivery of volatile-rich carbonaceous bodies.
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Origin of moderately volatile elements in Earth inferred from mass-dependent Ge isotope variations among chondrites
New Ge isotope data for carbonaceous and enstatite chondrites give a bulk silicate Earth carbonaceous-chondrite fraction of 0.64±0.16, larger than the Zn fraction of 0.29±0.07, indicating late delivery of volatile-rich carbonaceous bodies.