• Geology
  • Published 1983

Eruption Age of a Pleistocene Basalt From 40 Ar- 39 Ar Analysis of Partially Dega

@inproceedings{Glllespie1983EruptionAO,
  title={Eruption Age of a Pleistocene Basalt From 40 Ar- 39 Ar Analysis of Partially Dega},
  author={A. R. Glllespie and John C. Huneke and Gerald J. Wasserburg},
  year={1983}
}
We have applied 40 ArAr dating to potassium-rich granitic xenoliths and host basalt from the Pleistocene Big Pine volcanic field, California. These xenoliths had been partially degassed upon their inclusion in the basaltic lava. Argon released from the xenoliths at extraction temperatures below 900°C yielded plateau ages indistinguishable from the total K-Ar age of the basalt. The best estimate of the age of eruption was 1.18 ± 0.05 (2u) m.y. 40Ar extracted at higher temperatures included… CONTINUE READING

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