Neon isotopes constrain convection and volatile origin in the Earth's mantle

  title={Neon isotopes constrain convection and volatile origin in the Earth's mantle},
  author={Chris J. Ballentine and Bernard Marty and Barbara Sherwood Lollar and Martin Cassidy},
Identifying the origin of primordial volatiles in the Earth's mantle provides a critical test between models that advocate magma-ocean equilibration with an early massive solar-nebula atmosphere and those that require subduction of volatiles implanted in late accreting material. Here we show that neon isotopes in the convecting mantle, resolved in magmatic CO2 well gases, are consistent with a volatile source related to solar corpuscular irradiation of accreting material. This contrasts with… CONTINUE READING
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