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  • 1
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    Abundance of mercury in regolith of the Sea of Fertility, Sea of Tranquillity, and Ocean of Storms (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The direct determination of mercury by the atomic fluorescent method is described, involving the pulsed thermal atomization of powdered samples when the mercury is vaporized in argon at normal pressure. An increase in the mercury abundance in the regolith of the surficial layer with decrease in grain size and with variation in depth was noted, from 6 minus 1 million the surficial layer to 9 minus 1 million percent at a depth of about 30 cm. It is shown that in conditions simulating lunar day, at temperatures of 130-150 C up to 15 to 20 percent of the mercury is vaporized from a 2 mg regolith weighed sample, and thus the hypothesis is advanced that mercury is adsorbed by the surface layers of the lunar surface material during lunar night and desorbed during lunar day. The assumption is advanced that there exists a meridional mercury wind between subsolar region of the moon (heater) and the polar regions (cooler).
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar Soil from the Sea of Fertility (NASA-TT-F-15881); p 253-259
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Chemical composition of Luna 16 lunar regolith (1974)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Data on the chemical composition of regolith returned by the Luna 16 automatic station and two fragments of basalts from the lower layer of the core are presented. Spark mass spectrometric, primary X-ray spectral, emission spectral, and atomic absorption methods were used in the analysis. The regolith of mare provinces were shown to be a mixture of material of various origins. The source of the material of the mare regolith was principally basalts of the corresponding lunar lava maria. The regolith is genetically related to it. This follows from a comparison of the chemical composition, mineralogical, and petrochemical features of the basesalts and the regolith from the Sea of Fertility, Sea of Tranquillity, and Ocean of Storms, respectively.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar Soil from the Sea of Fertility (NASA-TT-F-15881); p 179-201
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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