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Remanent magnetization stratigraphy of lunar coresDepth dependent fluctuations have been observed in the natural remanent magnetizations (NRM) of drive cores and drill strings from Apollo 16 and 17 missions. Partial demagnetization of unstable secondary magnetizations and identification of characteristic error signals from a core which is known to have been recently disturbed allow us to identify and isolate the stable NRM stratigraphy in double drive core 60010/60009 and drill strings 60002-60004. The observed magnetization fluctuations persist after normalization to take into account depth dependent variations in the carriers of stable NRM. We tentatively ascribe the stable NRM stratigraphy to instantaneous records of past magnetic fields at the lunar surface and suggest that the stable NRM stratigraphy technique could develop as a new relative time-stratigraphic tool, to be used with other physical measurements such as relative intensity of ferromagnetic resonance and charged particle track density to study the evolution of the lunar regolith.
Document ID
19780057812
Document Type
Conference Proceedings
Authors
Banerjee, S. K. (Minnesota Univ. Minneapolis, MN, United States)
Gingrich, D. (Minnesota Univ. Minneapolis, MN, United States)
Marvin, J. A. (Minnesota, University Minneapolis, Minn., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
LUNAR AND PLANETARY EXPLORATION
Meeting Information
Lunar Science Conference(Houston, TX)
Funding Number(s)
CONTRACT_GRANT: NGR-24-005-248
Distribution Limits
Public
Copyright
Other