Other
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7..315m&link_type=abstract
In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 1. (A77-34651 15-91) New York, Pergamon
Other
30
Ferromagnetic Resonance, Lunar Soil, Metal Particles, Micrometeorites, Particle Collisions, Core Sampling, Lunar Landing Sites, Lunar Surface, Surface Reactions
Scientific paper
The intensity of the characteristic FMR resonance of a lunar soil normalized to its total iron content (Is/FeO) was tested for use as its index of relative surface exposure age. The characteristic resonance is due to fine-grained metal that is the result of micrometeorite impact at the lunar surface. In this study, Is/FeO was measured for the below 250 micron size fraction of 152 soils and for the 90-150 micron size fraction of 88 soils. With this large suite of samples it was possible to correlate Is/FeO with a variety of other indices of relative surface exposure age (N, C, trapped He-4, trapped Ar-36, petrographic and magnetic agglutinates, and mean grain size) and thus not only affirm that Is/FeO is an index of relative surface exposure age but also consider the relative merits of the various surface exposure indices.
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