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Related Experiment Videos

Glazed lunar rocks: origin by impact.

J W Morgan, J C Laul, R Ganapathy

    Science (New York, N.Y.)
    |May 7, 1971
    PubMed
    Summary
    This summary is machine-generated.

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    Lunar rock 12017's glassy coating contains 15 trace elements, likely from a meteorite impact. This shock-melted material shows contamination from meteoritic or local soil sources.

    Area of Science:

    • Geology
    • Planetary Science
    • Cosmochemistry

    Background:

    • Lunar rock 12017 exhibits a unique glassy coating.
    • This coating is notably enriched in 15 trace elements compared to its crystalline interior.

    Purpose of the Study:

    • To analyze the composition and origin of the glassy coating on lunar rock 12017.
    • To determine the source of the trace element enrichment and the nature of the glassy material.

    Main Methods:

    • Analysis of trace element composition of the glassy coating and crystalline interior of lunar rock 12017.
    • Investigating the potential sources of contamination, including meteoritic material and local lunar soil.

    Main Results:

    • The glassy coating is primarily composed of shock-melted rock.

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  • It is enriched in rare earth elements and alkali metals relative to the bulk rock.
  • The glass is contaminated with approximately 0.5% carbonaceous-chondrite-like material or a mixture of meteoritic and local soil components.

    • Conclusions:

    • The glassy coating likely formed from molten material ejected during a nearby meteorite impact.
    • The observed composition suggests splash ejecta rather than in-situ melting due to solar events.