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Northwest Africa 8124 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8124 This is an OFFICIAL meteorite name. Abbreviation: NWA 8124 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 462 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 18 Dec 2015 | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 8124 (NWA 8124) (Northwest Africa) Purchased: 2013 Apr Classification: Ordinary chondrite (LL3) History: Purchased by Sergey Vasiliev and Marc Jost in April 2013 from a dealer in Laayoune, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Large, well-formed, very closely packed chondrules within a sparse, relatively metal-poor matrix. Minerals are olivine, orthopyroxene, pigeonite, subcalcic augite, sodic plagioclase, chromite, altered kamacite and troilite. Geochemistry: Olivine (Fa0.6-43.6, N = 8; Cr2O3 in ferroan examples is 0.08-0.13 wt.%, mean 0.10±0.02 wt.%, N = 6), orthopyroxene (Fs2.3-8.1Wo0.2-0.6, N = 3), pigeonite (Fs29.0Wo14.6), subcalcic augite (Fs42.3Wo27.0). Oxygen isotopes (K. Ziegler, UNM): analyses by laser fluorination of acid-washed subsamples gave, respectively δ17O 3.326, 2.568, 3.348, 3.292; δ18O 5.242, 4.718, 5.190, 5.470; Δ17O -\0.558, 0.077, 0.608, 0.404 per mil (for a TFL slope of 0.528). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.80. Classification: Ordinary chondrite (LL3). Chondrule sizes and metal content (magnetic susceptibility) are consistent with LL. Specimens: 24.6 g including one polished thin section at UWB. The remainder is held jointly by S. Vasiliev and M. Jost. | ||||||||||||||||||||||||||||||||
Data from: MB104 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |