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Northwest Africa 10954 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10954 This is an OFFICIAL meteorite name. Abbreviation: NWA 10954 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2024 approved meteorites (plus 4 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 1 Mar 2017 | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 106:
Northwest Africa 10954 (NWA 10954) (Northwest Africa) Purchased: 2005 Classification: Ordinary chondrite (L4) History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005 and subsequently acquired by the Hollis Collection. Physical characteristics: (P.Sipiera, PSF) Rounded "6 sided" individual stone (14056 g) with approximate dimensions of 17 cm by 18 cm by 26 cm. The chocolate-brown exterior has a rough appearance caused by uniformly distributed small bumps, but lacks any "thumb-print" features. The fresh interior is dark gray with relatively abundant bright metal grains and small round chondrules. Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen. Well-formed chondrules (apparent diameter 300±200 µm) are set in a relatively coarse grained matrix containing unaltered metal. Geochemistry: Olivine (Fa21.3-22.1, N = 3), orthopyroxene (Fs18.1-18.3Wo1.3-1.1, N = 3), clinopyroxene (Fs6.3-8.5Wo44.9-44.5, N = 2). Oxygen isotopes (K. Ziegler, UNM): analysis of acid-washed subsamples by laser fluorination gave, respectively, δ17O 3.071, 3.399, 2.868; δ18O 4.009, 4.663, 3.485; Δ17O 0.954, 0.937, 1.024 per mil. Magnetic susceptibility log χ (× 10-9 m3/kg) =4.81. Classification: Ordinary chondrite (L4, highly shocked). Specimens: 189 g including one polished thin section at PSF; remainder in the Hollis Collection. | ||||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||||
Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) 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) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |