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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:
Recommended:  Diogenite    [explanation]

This is 1 of 505 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Boudreaux: Terry Boudreaux, Illinois, United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8746 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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