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Northwest Africa 13433 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13433 This is an OFFICIAL meteorite name. Abbreviation: NWA 13433 Observed fall: No Year found: 2020 Country: Mauritania Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 127 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 14 Oct 2020 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13433 (NWA 13433) Mauritania Purchased: 2020 Aug Classification: HED achondrite (Eucrite, unbrecciated) History: Two fitting stones (20840 g, 3855 g) found together at an undisclosed location in Mauritania were purchased by Rachid Chaoui in August 2020 from a Mauritanian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The studied specimen is quite fresh with a subophitic texture (mean grainsize ~0.6 mm), and is composed predominantly of calcic plagioclase and exsolved pigeonite with accessory silica polymorph, ilmenite, low-Ti chromite and troilite. Geochemistry: Low-Ca pyroxene host (Fs58.3-61.4Wo2.2-4.8, FeO/MnO = 29-31, N = 3), augite exsolution lamellae (Fs27.1-29.3Wo40.1-42.5, FeO/MnO = 31-34, N = 4), plagioclase (An87.8-89.3Or0.5=0.4, N = 3). Classification: Eucrite (unbrecciated, diabasic). Specimens: 22.1 g including one polished thin section at UWB; remainder with Mr. R. Chaoui. | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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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) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:![]() |
Statistics: This is 1 of 187 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) |