Solar and cosmogenic argon in dated lunar impact spherules

@inproceedings{Levine2007SolarAC,
  title={Solar and cosmogenic argon in dated lunar impact spherules},
  author={Jonathan M. Levine and Paul Randall Renne and Richard A. Muller},
  year={2007}
}
Abstract We have studied lunar impact spherules from the Apollo 12 and Apollo 14 landing sites, examining the isotopic composition of argon released by stepwise heating. Elsewhere, we reported the formation ages of these spherules, determined by the 40 Ar/ 39 Ar isochron method. Here, we discuss solar and cosmogenic argon from the same spherules, separating these two components by correlating their partial releases with the releases of calcium-derived 37 Ar on a “cosmochron” diagram. We use the… CONTINUE READING

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