Zircon Formation in Impact Melts: Complications for Deciphering Planetary

نویسندگان

  • M. M. Wielicki
  • T. M. Harrison
چکیده

Introduction: The impact history of the solar system remains controversial. Early investigation of lunar samples, returned by Apollo astronauts, led to the 'Late Heavy Bombardment' (LHB) concept [1,2] which hypothesized a sharp increase in bolide flux centered around ~3.9 Ga. Evidence for this cataclysm was first derived from whole-rock U-Pb and Rb-Sr ages [2] but subsequently more on 40 Ar-39 Ar data [3,4]. However, interpretations of lunar

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تاریخ انتشار 2014