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Northwest Africa 8338 | |||||||||||||||||||||||||
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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: ![]() | ||||||||||||||||||||||||
Classification history: |
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![]() |
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: MB103 Table 0 Line 0: |
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Institutions 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) |
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Catalogs: |
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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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Geography: |
Statistics: This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |