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    Small Antarctic micrometeorites: A mineralogical and in situ oxygen isotope study

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    Author
    Gounelle, M.
    Engrand, C.
    Maurette, M.
    Kurat, G.
    McKeegan, K. D.
    Brandstätter, F.
    Issue Date
    2005-01-01
    Keywords
    Nier Prize
    
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    Citation
    Gounelle, M., Engrand, C., Maurette, M., Kurat, G., McKeegan, K. D., & Brandstätter, F. (2005). Small Antarctic micrometeorites: A mineralogical and in situ oxygen isotope study. Meteoritics & Planetary Science, 40(6), 917-932.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656012
    DOI
    10.1111/j.1945-5100.2005.tb00163.x
    Additional Links
    https://meteoritical.org/
    Abstract
    We have investigated the texture, bulk chemistry, mineralogy, as well as the anhydrous minerals oxygen isotopic composition of 67 small Antarctic micrometeorites (AMMs) collected at Cap Prudhomme, Antarctica, and belonging to the currently poorly studied size fraction 25-50 micrometers. When compared to larger (50-400 micrometers) micrometeorites collected at the same site in Antarctica with the same techniques, no significant differences are found between the two populations. We therefore conclude that the population of Cap Prudhomme AMMs is homogeneous over the size range 25-400 micrometers. In contrast, small AMMs have different textures, mineralogy, and oxygen isotopic compositions than those of stratospheric interplanetary dust particles (IDPs). Because small AMMs (<50 micrometers) overlap in size with IDPs, the differences between these two important sources of micrometeorites can no longer be attributed to a variation of the micrometeorite composition with size. Physical biases introduced by the collection procedures might account for these differences.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2005.tb00163.x
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    Meteoritics & Planetary Science, Volume 40, Number 6 (2005)

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