Rubidium isotopes in primitive chondrites: Constraints on Earth's volatile element depletion and lead isotope evolution
The bulk silicate Earth (BSE) shows substantial deficits in volatile elements compared to CI-chondrites and solar abundances. These deficits could be caused by pre-accretionary depletion in the solar nebula during condensation of solids, or by later heat-driven evaporation during collision of small bodies that later accreted to form the Earth. The latter is considered to result in isotope fractionation for elements with low condensation temperatures that correlates with the degree of depletion....[Show more]
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|Source:||Earth and Planetary Science Letters|
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