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Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42..391k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 42, Apr. 1978, p. 391-402.
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3
Apollo 12 Flight, Geochemistry, Light Elements, Lunar Soil, Basalt, Carbon, Helium, Isotopes, Nitrogen, Potassium, Rare Earth Elements, Solar Wind, Sulfur, Titanium Oxides, Apollo 12, Landing Sites, Carbon, Helium, Nitrogen, Sulfur, Concentrations, 12001, 12023, 12030, 12032, 12033, 12037, 12042, 12044, 12070, Samples, Lunar, Sample Analysis
Scientific paper
Analytical techniques of improved sensitivity have revealed details of the concentrations and isotopic compositions of light elements for a comprehensive suite of samples from the Apollo 12 regolith. These samples show a wide spread in maturity, although maximum contents observed for solar wind elements are less than observed at other sites, possibly reflecting relative recency of craters at the Apollo 12 site. Isotopic composition of nitrogen is consistent with the idea that N-15/N-14 in the solar wind has increased with time, at least a major part of this increase having occurred in the past 3.1 Gyr. Sulfur isotope systematics support a model in which sulfur is both added to the regolith, by meteoritic influx, and lost, by an isotopically selective process. Most soils from this site are heavily contaminated with terrestrial carbon.
Desmarais David J.
Friedman Louis D.
Kaplan Isaac R.
Kerridge John F.
Kung Chun-Chan
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