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Refractory minerals in interplanetary dust.

R Christoffersen, P R Buseck

    Science (New York, N.Y.)
    |October 31, 1986
    PubMed
    Summary
    This summary is machine-generated.

    A newly discovered interplanetary dust particle reveals unique minerals similar to those in carbonaceous chondrite meteorites. This finding establishes a novel connection between dust particles and meteorites, enhancing our understanding of early solar system materials.

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    Area of Science:

    • Cosmic Mineralogy
    • Planetary Science
    • Meteoritics

    Background:

    • Interplanetary dust particles (IDPs) offer insights into primitive solar system materials.
    • Carbonaceous chondrites contain refractory calcium- and aluminum-rich inclusions (CAIs) that are among the earliest condensates.
    • Previous studies have identified limited mineralogical overlap between IDPs and CAIs.

    Purpose of the Study:

    • To characterize the mineralogy of a unique interplanetary dust particle.
    • To investigate the relationship between IDPs and refractory inclusions in meteorites.
    • To explore the formation processes of early solar system materials.

    Main Methods:

    • Petrographic analysis of the interplanetary dust particle.
    • Mineralogical identification using electron microscopy and spectroscopy.

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  • Comparison of mineral assemblages with those in carbonaceous chondrites.

    • Main Results:

    • The studied IDP contains diopside, magnesium-aluminum spinel, anorthite, perovskite, and fassaite.
    • Fassaite is the only mineral previously found in IDPs among this assemblage.
    • Complex intergrowths of diopside and spinel suggest formation via reaction with solar nebula gas.

    Conclusions:

    • The IDP represents a significant new link between interplanetary dust and carbonaceous chondrites.
    • The mineralogical similarities suggest a common origin or formation pathway.
    • Detailed compositional differences in diopside and spinel warrant further investigation into formation conditions.