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Northwest Africa 10808 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10808 This is an OFFICIAL meteorite name. Abbreviation: NWA 10808 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 293 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 24 Sep 2016 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 105:
Northwest Africa 10808 (NWA 10808) (Northwest Africa) Purchased: 2016 Apr Classification: Martian meteorite (Shergottite) History: Purchased by Darryl Pitt in April 2016 from a dealer in Ouarzazate, Morocco. Physical characteristics: Tan colored stone (188 g) with partial black fusion crust. Petrography: (A. Irving and S. Kuehner, UWS) Poikilitic texture. Composed mainly of zoned clinopyroxene (pigeonite, augite and subcalcic augite), olivine and interstitial, lath-like maskelynite with accessory ilmenite, Mg-bearing merrillite and pyrrhotite (some Ni-bearing) and baddeleyite. Some olivine occurs as anhedral chadacrysts within larger pyroxene grains. Olivine grains contain quenched melt inclusions (composed of glass with aluminous clinopyroxene crystallites). Some small shock melt pockets composed of dark glass are present. Geochemistry: Olivine (Fa30.3-32.2, FeO/MnO = 42-44, N = 3), pigeonite (Fs24.7-26.6Wo9.3-8.4, FeO/MnO = 25-26, N = 4), augite and subcalcic augite (Fs13.7-16.2Wo40.0-31.4, FeO/MnO = 21-24, N = 4), maskelynite (An50.6-50.7Or1.5-1.8, N = 2). Oxygen isotopes (K. Ziegler, UNM): analysis of acid-washed subsamples by laser fluorination gave, respectively, d17O = 2.810, 2.812, 2.751, 2.683; d18O = 4.780, 4.779, 4.602, 4.660; D17O = 0.286, 0.289, 0.321, 0.223 per mil. Classification: Martian (shergottite, poikilitic). Specimens: 20.67 g including one polished thin section at UWB; remainder with DPitt. | ||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |