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Northwest Africa 15339
Basic information Name: Northwest Africa 15339
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15339
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 9.76 kg
Meteoritical Bulletin:  MB 111  (2023)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 63 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 4 Dec 2022
Writeup from MB 111:

Northwest Africa 15339 (NWA 15339)

(Northwest Africa)

Purchased: 2022 Mar

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Craig Zlimen and Mark Lyon in March 2022 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed predominantly of diogenitic orthopyroxene mineral clasts, some lithic diogenite clasts and minor (< 2 vol.%) lithic eucrite clasts (with fine-intergranular and gabbroic textures). Some but not all diogenitic orthopyroxene exhibits undulose extinction. Other minerals are exsolved pigeonite, calcic plagioclase, and accessory silica polymorph, medium-Ti chromite, ilmenite, troilite and kamacite. Some orthopyroxene in exsolved pigeonite exhibits reverse compositional zoning. Also present are some symplectitic intergrowths of augite with troilite and kamacite.

Geochemistry: Diogenitic orthopyroxene (cores Fs22.8-23.4Wo1.9, FeO/MnO = 27-29, N = 2; rims Fs31.5-32.6Wo1.8-1.9, FeO/MnO = 29-31, N = 2; Fs29.7Wo1.6, FeO/MnO = 30), eucritic orthopyroxene hosts (Fs39.0-45.7Wo2.5-2.7, FeO/MnO = 24-29, N = 2), eucritic augite exsolution lamellae (Fs16.3-19.9Wo43.8-41.9, FeO/MnO = 21-23, N = 2), zoned eucritic orthopyroxene host (core Fs44.0Wo4.1, FeO/MnO = 31; rim Fs32.8Wo2.5, FeO/MnO = 33), augite in symplectite (Fs15.9Wo43.5, FeO/MnO = 19), augite (Fs13.3Wo45.7, FeO/MnO = 26), plagioclase (An78.9-88.4Or1.3-0.5, N = 4).

Classification: Diogenite (polymict breccia).

Specimens: 58 g including one polished thin section at UWB; remainder with Mr. C. Zlimen and Mr. M. Lyon.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022 Mar
Mass (g):9760
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):22.8-23.4; 29.7-32.6; 39.0-45.7; 16.3-19.9
Wollastonite (mol%):1.9; 1.6-1.9; 2.7-2.5; 43.8-41.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):58
Type spec location:UWB
Main mass:C. Zlimen and M. Lyon
Comments:Work name ZLI 077; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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    (Caution, these are of unknown reliability)
Robert Smart   

     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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