Infrared imaging spectroscopy with micron resolution of Sutter's Mill meteorite grains

    Authors

    M. Yesiltas; Y. Kebukawa; R. E. Peale; E. Mattson; C. J. Hirschmugl;P. Jenniskens

    Comments

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    Abbreviated Journal Title

    Meteorit. Planet. Sci.

    Keywords

    DIFFUSE INTERSTELLAR-MEDIUM; INSOLUBLE ORGANIC-MATTER; CARBONACEOUS; CHONDRITES; HYDROUS COMPONENTS; COMET 81P/WILD-2; SOLAR-SYSTEM; MICROSPECTROSCOPY; ASTEROIDS; STARDUST; ORIGIN; Geochemistry & Geophysics

    Abstract

    Synchrotron-based Fourier transform infrared spectroscopy and Raman spectroscopy are applied with submicrometer spatial resolution to multiple grains of Sutter's Mill meteorite, a regolith breccia with CM1 and CM2 lithologies. The Raman and infrared active functional groups reveal the nature and distribution of organic and mineral components and confirm that SM12 reached higher metamorphism temperatures than SM2. The spatial distributions of carbonates and organic matter are negatively correlated. The spatial distributions of aliphatic organic matter and OH relative to the distributions of silicates in SM2 differ from those in SM12, supporting a hypothesis that the parent body of Sutter's Mill is a combination of multiple bodies with different origins. The high aliphatic CH2/CH3 ratios determined from band intensities for SM2 and SM12 grains are similar to those of IDPs and less altered carbonaceous chondrites, and they are significantly higher than those in other CM chondrites and diffuse ISM objects.

    Journal Title

    Meteoritics & Planetary Science

    Volume

    49

    Issue/Number

    11

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    2027

    Last Page

    2037

    WOS Identifier

    WOS:000344731500005

    ISSN

    1086-9379

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