A long-lived lunar core dynamo.

  title={A long-lived lunar core dynamo.},
  author={Erin K Shea and Benjamin P Weiss and William S Cassata and David L Shuster and Sonia M Tikoo and J Gattacceca and Timothy L Grove and M. Fuller},
  volume={335 6067},
Paleomagnetic measurements indicate that a core dynamo probably existed on the Moon 4.2 billion years ago. However, the subsequent history of the lunar core dynamo is unknown. Here we report paleomagnetic, petrologic, and (40)Ar/(39)Ar thermochronometry measurements on the 3.7-billion-year-old mare basalt sample 10020. This sample contains a high-coercivity magnetization acquired in a stable field of at least ~12 microteslas. These data extend the known lifetime of the lunar dynamo by 500… CONTINUE READING
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