The extent of lunar regolith mixing

Details The extent of lunar regolith mixing The extent of lunar regolith mixing

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..44..409n&link_type=abstract

Earth and Planetary Science Letters, vol. 44, no. 3, Sept. 1979, p. 409-419.

Computer Science

7

Core Sampling, Lunar Core, Lunar Surface, Manganese Isotopes, Regolith, Solar Cosmic Rays, Aluminum 26, Apollo 15 Flight, Apollo 16 Flight, Depth, Mixing, Monte Carlo Method, Sodium 22, Tables (Data), Moon, Regolith, Mixing, Manganese, Samples, Lunar, Core-Tube Samples, Apollo Program, Landing Sites, Sodium, Aluminum, Isotopes, Soils, Models, Depths, Monte Carlo Technique, Experiments, Data, Flux, Cosmic Rays, Iron, Chronology, Deep Drill Cores, Terrestrial, Comparisons, Analysis, Chemistry, 60007, 60006, 1

Scientific paper

The activity of solar cosmic-ray-produced Mn-53 measured as a function of depth in the upper 100 g/sq cm of lunar cores 60009-60010 and 12025-12028 is discussed. Analyses of samples from the Apollo 15 and 16 drill stems together with authors' previously published results (1974, 1976), and the Battelle Na-22 and Al-26 data, indicate that in three of the four cases studied the regolith was measurably disturbed within the last 10 m.y. Activities measured in the uppermost 2 g/sq cm indicate frequent mixing within this depth range. The Monte Carlo gardening model of Arnold (1975) was used to derive profiles for the gardened moon-wide average of Mn-53 and Al-26 as a function of depth. The Mn-53 and Al-26 experimental results agreed with theoretical predictions, but the calculated depths of disturbance appeared too low.

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