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Trace elements and accessory minerals in lunar samples.

G W Reed, S Jovanovic, L H Fuchs

    Science (New York, N.Y.)
    |January 30, 1970
    PubMed
    Summary
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    Apollo 11 lunar samples contain halogen elements comparable to meteorites. Unique mercury release patterns were observed, differing from terrestrial rocks and meteorites.

    Area of Science:

    • Lunar geology
    • Cosmochemistry
    • Geochemistry

    Background:

    • Apollo 11 samples provide insights into lunar composition.
    • Comparison with meteorites and terrestrial rocks is crucial for understanding planetary formation.

    Purpose of the Study:

    • To analyze halogen and trace element concentrations in Apollo 11 samples.
    • To investigate the thermal release behavior of mercury.
    • To identify mineralogical components.

    Main Methods:

    • Elemental analysis for mercury, uranium, lithium, osmium, and chromium oxide.
    • Thermal analysis to study mercury release.
    • Mineralogical identification using various techniques.

    Main Results:

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    • Halogen contents in Apollo 11 samples are similar to meteorites.
    • Measured concentrations include mercury (0.6-13 ppm), uranium (0.2-0.8 ppm), lithium (1-17 ppm), osmium (1-800 ppm), and chromium oxide (0.5-1%).
    • A significant mercury release below 110°C was observed, distinct from meteorites and terrestrial rocks.
    • New mineral phases including fluorapatite, quartz, tridymite, fayalite, and pyroxmangite were identified.

    Conclusions:

    • The elemental composition suggests a common origin or similar processes for lunar samples and meteorites.
    • The anomalous mercury release indicates unique geological or chemical processes on the Moon.
    • Further research is needed to explain the fluorine content and the observed mercury behavior.