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Northwest Africa 15311
Basic information Name: Northwest Africa 15311
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15311
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1375 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 522 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15311 (NWA 15311)

(Northwest Africa)

Purchased: 2022 Jul

Classification: HED achondrite (Diogenite)

History: Purchased by Terry Boudreaux in July 2022 from a dealer in Zagora, Morocco.

Physical characteristics: A single dense stone (1375 g) lacking fusion crust but coated by a thin lustrous, dark brown desert patina. The fresh interior is medium gray in color and appears massive with no evident grain structure.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very coarse grained aggregate (estimated grainsize > 4 cm) dominated by orthopyroxene together with minor low-Ti chromite, troilite, stained kamacite and secondary barite.

Geochemistry: Orthopyroxene (Fs26.6-26.7Wo3.0-3.1, FeO/MnO = 28-31, N = 4).

Classification: Diogenite (very coarse grained).

Specimens: 22.5 g including a polished mount at UWB; remainder with Boudreaux.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2022 Jul
Mass (g):1375
Pieces:1
Class:Diogenite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):26.6-26.7
Wollastonite (mol%):3.0-3.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.5
Type spec location:UWB
Main mass:Boudreaux
Comments:Work name DB-60; submitted by A. Irving
Institutions
   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)
Boudreaux: Terry Boudreaux, Illinois, United States (private address)
Catalogs:
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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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