Computer Science
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..68....7f&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 68, no. 1, April 1984, p. 7-18. NATO-supported research.
Computer Science
7
Breccia, Highlands, Lunar Rocks, Nitrogen Isotopes, Regolith, Apollo 14 Flight, Apollo 16 Flight, Argon, Helium, Solar Wind, Xenon, Moon, Breccias, Samples, Lunar, Nitrogen, Isotopic Ratios, Highlands, Solar Wind, Rare Gases, Composition, Procedure, Techniques, Evolution, 14047, 14055, 14307, 60255, Apollo 14, Landing Sites, Soils, Fission, Xenon, Mixing, Patterns, Hypotheses, Abundance
Scientific paper
Lunar highlands breccias from Apollo 14 and 16 which may have trapped solar wind gases at a very early epoch in the history of the moon, as implied by their high content of parentless fissiogenic xenon and sometimes of parentless radiogenic Xe-129, are analyzed for nitrogen content and isotopic composition using stepwise heating techniques. The results show that the nitrogen is not particularly light and was not acquired in very ancient times. The conflicting presence of both parentless xenon and nitrogen of relatively recent isotopic signature can be explained if the hypothetical light nitrogen is diluted by more abundant, heavier nitrogen. Accordingly, the very ancient soil components implied in these breccias by the presence of excess fission xenon were reexposed at a much later epoch, or mixed with younger soil components, before the compaction event.
Clayton Robert N.
Fourcade Serge
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