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  • 1
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    Bulk, rare earth and other trace elements in Apollo 14 and 15 and Luna 16 samples (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The chemical abundances were measured by instrumental and radiochemical neutron activation analysis in a variety of lunar specimens. Apollo 14 soils are characterized by significant enrichments of Al2O3, Na2O and K2O and depletions of TiO2, FeO, MnO and Cr2O3 relative to Apollo 11 and to most of Apollo 12 soils. The uniform abundances in 14230 core tube soils and three other Apollo 14 soils indicate that the regolith is uniform to at least 22 cm depth and within approximately 200 m from the lunar module. Two Luna 16 breccias are similar in composition to Luna 16 soils. Four Apollo 15 soils (LM, STA 4, 9, and 9a) have variable compositions. Interelement correlations between MnO-FeO, Sc-FeO, V-Cr2O3 and K2O-Hf negate the hypothesis that howardite achondrites may be primitive lunar matter, argue against the fission hypothesis for the origin of the moon, and precludes any selective large scale volatilization of alkalies during lunar magmatic events.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-127075
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Bulk, rare earth, and other trace elements in Apollo 14 and 15 and Luna 16 samples. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Measurement of 24 and 34 bulk, minor, and trace elements in lunar specimens by instrumental and radiochemical neutron activation analysis shows greater Al2O3, Na2O, and K2O abundances and higher TiO2, FeO, MnO and Cr2O3 depletions in Apollo 14 soil samples as compared to Apollo 11 samples and to most of Apollo 12 samples. The uniform abundances in 14230 core tube soils and three other Apollo 14 soils indicate that the regolith is uniform to at least 22 cm depth and within about 200 m from the lunar module.
    Keywords: SPACE SCIENCES
    Type: Lunar Science Conference; Jan 10, 1972 - Jan 13, 1972; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
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