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Northwest Africa 1459 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 1459 This is an OFFICIAL meteorite name. Abbreviation: NWA 1459 Observed fall: No Year found: 2002 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 518 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 87:
Northwest Africa 1459 Morocco Purchased 2002 March Achondrite (diogenite, olivine-bearing) A small complete stone (49 g) found near Iriqui, Morocco was purchased from a Moroccan dealer by A. and G. Hupé (xHupé) in 2002 March. The interior of the stone is dark yellow-green, and the exterior is coated by a thin, weathered fusion crust with protruding subhedral chromite grains (up to 4 mm). Classification and mineralogy (A. Irving and S. Kuehner, UWS): coarse-grained cataclastic protogranular texture. Subequal amounts of orthopyroxene (Fs28Wo4.7 to Fs30Wo6.5, FeO/MnO = 28–32) and olivine (Fa36; FeO/MnO = 46.5), with minor chromite (Cr/(Cr + Al) = 0.62 cores to 0.66 rims), anorthitic plagioclase (Ab6.8-Ab9.3), troilite, and metal (0.06 wt% Ni). Some orthopyroxene grains (up to 10 mm)have sparse exsolution lamellae of clinopyroxene (Fs10Wo46 to Fs11Wo45, FeO/MnO = 28–32). Some olivine grains (up to 8 mm) have multiple tilt-boundaries. Irregular areas along grain boundaries are composed of symplectitic intergrowths of chromite and orthopyroxene. Oxygen isotope composition (D. Rumble, CIW): δ18O = +3.62 ± 0.02‰; δ17O = +1.72 ± 0.04‰; ∆17O = -0.19 ± 0.02‰. Specimens: type specimen, 10 g, and one polished thin section, UWS; main mass, xHupé. | ||||||||||||||||||||||||||
Data from: MB87 Table 8 Line 85: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address) xHupé: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater) |