Geochemistry: How well can Pb isotopes date core formation?

  title={Geochemistry: How well can Pb isotopes date core formation?},
  author={Balz S. Kamber and Jan D. Kramers},
Arising from: B. J. Wood & A. N. Halliday 437, 1345–1348 (2005); Wood & Halliday replyTimescale and the physics of planetary core formation are essential constraints for models of Earth's accretion and early differentiation. Wood and Halliday use the apparent mismatch in core-formation dates determined from tungsten (W) and lead (Pb) chrono-meters to argue for a two-stage core formation, involving an early phase of metal segregation followed by a protracted episode of sulphide melt addition… CONTINUE READING