拍品 12
拍品 12
A Complete Meteorite from the Planet Mars (NWA 7397)

DISCOVERED IN SMARA, MOROCCO, 2012

    成交價 USD 43,750
    估價
    USD 35,000 - USD 55,000
    試用
    A Complete Meteorite from the Planet Mars (NWA 7397)

    DISCOVERED IN SMARA, MOROCCO, 2012

    成交價 USD 43,750
    成交價 USD 43,750
    詳情
    A Complete Meteorite from the Planet Mars (NWA 7397)
    Discovered in Smara, Morocco, 2012
    The formal name for this specimen is NWA 7397. Subsequent to its recovery from Morocco in 2012, other matching specimens were found in the same proximity and it soon became clear this was part of a shower of Martian meteorites.
    2½ x 2 x 1½in. (6.3 x 5.1 x 3.8cm.)
    161.4g

    Literature
    See entry in the Meteoritical Bulletin Database: http://www.lpi.usra.edu/meteor/metbull.php?code=55749
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    • 拍品賣家為： Christie's Inc
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    拍品專文

    Like many other Martian basalts in the world’s meteorite collections, it probably formed as a basalt flow at or near the surface of Mars. The unusual “poikilitic” texture of this rock is marked by large crystals of pyroxene (a magnesium-iron silicate) enclosing small crystals of olivine (a magnesium-iron silicate) and chromite (an iron-chromium oxide). The texture most likely formed by rapid cooling of the rock from magmatic temperatures. The feldspar mineral grains (a calcium-aluminum silicate) have been transformed into glass, a mark of the intense shock pressure experienced by the rock when it was blasted off the surface of Mars by an enormously energetic impact event.

    Click here to learn more about the science and history of meteorites.