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Northwest Africa 14139
Basic information Name: Northwest Africa 14139
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14139
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 192 g
Meteoritical Bulletin:  MB 110  (2022)  C3-ung
Recommended:  C3-ung    [explanation]

This is 1 of 31 approved meteorites classified as C3-ung.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites
Comments: Approved 31 Aug 2021
Writeup from MB 110:

Northwest Africa 14139 (NWA 14139)

(Northwest Africa)

Purchased: 2021 Apr

Classification: Carbonaceous chondrite (C3, ungrouped)

History: Purchased by Ziyao Wang in April 2021 from a dealer in Ouargla, Algeria.

Physical characteristics: A batch of many fine grained, friable black stones (total weight 192 g).

Petrography: (A. Irving, UWS and P. Carpenter, WUSL; L. Garvie, ASU) Optical microscopy coupled with electron microprobe analyses and imaging reveal the presence of very small, glass-bearing chondrules (apparent diameter 270±130 µm, N = 20), mineral fragments and AOA set in an ultra fine-grained matrix (~50 vol.%, opaque in thin section) containing iron sulfide, pentlandite, low-Ti chromite and minor secondary calcite. No CAI were observed. The powder X-ray diffraction profile is dominated by intense reflections for olivine (dominated by magnesian compositions), clinoenstatite, pyrrhotite, pentlandite and calcite. These reflections sit on a medium intensity, broad scattering peak centered around 33° 2theta (Cu K alpha), indicative of amorphous material. Although distinct reflections for phyllosilicates are absent, there is a broad low-angle scattering centered around 13 Å.

Geochemistry: Olivine (Fa29.7±23.9, range Fa0.8-65.4, N = 6), low-Ca pyroxene (Fs2.2±2.5Wo2.5±1.9, range Fs0.7-6.6Wo1.0-4.7, N = 5), augite (Fs13.7±17.7Wo39.4±2.3, range Fs1.2-26.2Wo41.0-37.7, N = 2). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -4.933, -5.739, -1.985; δ18O 1.002, 0.221, 4.810; Δ17O -5.462, -5.856, -4.525 per mil (all data linearized).

Classification: Carbonaceous chondrite (C3 ungrouped). This material resembles Telakoast 001 in many respects, including textures, mineralogy, mineral compositions and oxygen isotopes (plotting in the same region below the CCAM trend).

Specimens: 24 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouargla, Algeria
Date:P 2021 Apr
Mass (g):192
Shock stage:S1
Weathering grade:low
Fayalite (mol%):29.7±23.9
Ferrosilite (mol%):2.2±2.5
Wollastonite (mol%):2.5±1.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-42; submitted by A. Irving
Plots: O isotopes:  
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Chunliang Zhang         
Qi Lv               
Ziyao Wang      

     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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