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Northwest Africa 14074
Basic information Name: Northwest Africa 14074
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14074
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 470 g
Recommended:  LL3    [explanation]

This is 1 of 409 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 24 Dec 2021
Writeup from MB 110:

Northwest Africa 14074 (NWA 14074)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Ordinary chondrite (LL3)

History: A lot of 21 identical-appearing, somewhat weathered stones was purchased by Shun-Chung Yang and Juan Chen in December 2020 from dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, very closely packed chondrules (apparent diameter 1060±570 µm, N = 25) are set in a very sparse matrix (opaque in thin section) containing altered kamacite, taenite and troilite.

Geochemistry: Olivine (Fa22.8±9.8, range Fa1.4-35.0, N = 10; Cr2O3 in ferroan olivine 0.04-0.18 wt.%, mean 0.12±0.05 wt.%, N = 8), low-Ca pyroxene (Fs16.1±6.1Wo1.9±1.2, range Fs7.2-20.7Wo0.3-3.3, N = 4), pigeonite (Fs22.3±6.1Wo6.1±0.7, range Fs18.0-26.6Wo6.6-5.6, N = 2), subcalcic augite (Fs29.8±5.7Wo31.9±1.2, range Fs25.8-33.8Wo32.7-31.0, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.12.

Classification: Ordinary chondrite (LL3). LL group based on magnetic susceptibility and chondrule size.

Specimens: 20.5 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2020 Dec
Mass (g):470
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):22.8±9.8
Ferrosilite (mol%):16.1±6.1
Wollastonite (mol%):1.9±1.2
Magnetic suscept.:4.12
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.8
Type spec location:UWB
Main mass:S.-C. Yang/J. Chen
Comments:Work name SCY-22; submitted by A. Irving
   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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8390 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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