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Ferromagnetic resonance studies of lunar core stratigraphyWe first review the evidence which links the characteristic ferromagnetic resonance observed in lunar fines samples with agglutinatic glass produced primarily by micrometeorite impacts and present new results on Apollo 15, 16, and 17 breccias which support this link by showing that only regolith breccias contribute significantly to the characteristic FMR intensity. We then provide a calibration of the amount of Fe metal in the form of uniformly magnetized spheres required to give our observed FMR intensities and discuss the theoretical magnetic behavior to be expected of Fe spheres as a function of size. Finally, we present FMR results on samples from every 5 mm interval in the core segments 60003, 60009, and 70009. These results lead us to suggest: (1) that secondary mixing may generally be extensive during regolith deposition so that buried regolith surfaces are hard to recognize or define; and (2) that local grinding of rocks and pebbles during deposition may lead to short scale fluctuations in grain size, composition, and apparent exposure age of samples.
Document ID
19770051801
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Housley, R. M.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Cirlin, E. H.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Goldberg, I. B.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Crowe, H.
(Rockwell International Science Center Thousand Oaks, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1976
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 15, 1976
End Date: March 19, 1976
Accession Number
77A34653
Funding Number(s)
CONTRACT_GRANT: NAS9-11539
Distribution Limits
Public
Copyright
Other

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