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Northwest Africa 8338
Basic information Name: Northwest Africa 8338
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8338
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 1870 g
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 71 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Apr 2014
Writeup from MB 103:

Northwest Africa 8338 (NWA 8338)

(Northwest Africa)

Purchased: 2013

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased by Ali and Mohammed Hmani in Erfoud, Morocco, 2013.

Physical characteristics: Single stone, light brown-green, weathered, irregular surface, with some vesicles visible, one prominent vesicle ~2 cm in diameter. Saw cut reveals scattered plagioclase and pyroxene fragments up to 3 mm set in a very fine grained matrix, numerous vesicles throughout, many <1 mm, though larger >1 mm also present.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows many fragmental plagioclase and pyroxene grains 50-2000 μm surrounded by vesicular melt veins and pools, some melt zones transitioning to a groundmass of very fine-grained acicular plagioclase and equant pyroxene. Fragmental plagioclase and pyroxene show irregular resorption or reaction rims, most pyroxene possess exsolution lamellae. Accessory iron metal, troilite, chromite, and silica.

Geochemistry: (C. Agee and H. Miley, UNM) Low-Ca pyroxene Fs56.9±5.0Wo8.2±4.3, Fe/Mn=32±1, n=17; augite Fs29.9±1.8Wo41.3±2.0, Fe/Mn=32±2, n=12; plagioclase An88.8±4.0, n=9.

Classification: Achondrite (Eucrite, melt breccia) fragmental, equilibrated basaltic eucrite grains set in a vesicular eucritic melt rock.

Specimens: 24.3 g including a probe mount on deposit at UNM, Ali and Mohammed Hmani hold the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):1870
Class:Eucrite-melt breccia
Ferrosilite (mol%):56.9±5.0, 29.9±1.8
Wollastonite (mol%):8.2±4.3, 41.3±2.0
Classifier:C. Agee, UNM
Type spec mass (g):24.3
Type spec location:UNM
Main mass:Ali and Mohammed Hmani
Comments:Field name OA-3; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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