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Tektite glass in apollo 12 sample.

J A O'keefe

    Science (New York, N.Y.)
    |June 5, 1970
    PubMed
    Summary
    This summary is machine-generated.

    Lunar sample 12013

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    Area of Science:

    • Geochemistry
    • Lunar geology
    • Tektite research

    Background:

    • Lunar sample 12013 from Apollo 12 presents a unique glassy composition.
    • Tektites are natural glasses of terrestrial origin, often found in specific geological contexts.
    • Understanding the origin of lunar materials and tektites is crucial for planetary science.

    Purpose of the Study:

    • To chemically characterize the glassy portion of lunar sample 12013.
    • To compare the chemical composition of lunar sample 12013 with terrestrial igneous rocks and tektites.
    • To investigate the potential origin of tektites based on chemical similarities with lunar samples.

    Main Methods:

    • Chemical analysis of the glassy portion of lunar sample 12013.
    • Comparative chemical analysis with known terrestrial igneous rocks.

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  • Comparative chemical analysis with tektites from Java.

    • Main Results:

    • The glassy portion of lunar sample 12013 is chemically similar to tektites from Java.
    • Lunar sample 12013 meets all chemical criteria to be classified as a tektite.
    • Lunar sample 12013's composition differs significantly from terrestrial igneous rocks.

    Conclusions:

    • Tektites are likely volcanically ejected from the Moon, not formed by impact.
    • The Moon's ancient and basaltic nature contrasts with the younger, acid nature of tektites.
    • This finding challenges conventional impact-based theories for tektite formation.