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Northwest Africa 10894 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10894 This is an OFFICIAL meteorite name. Abbreviation: NWA 10894 Observed fall: No Year found: 2016 Country: Mauritania Mass: 2.52 kg | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 54 approved meteorites classified as Eucrite-cm. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 18 Nov 2016 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
Northwest Africa 10894 (NWA 10894) Mauritania Purchased: April 2016 Classification: HED achondrite (Eucrite, cumulate) History: Found by meteorite hunters during an expedition near the Western Saharan, Algerian and Mauritanian border region. Purchased in Mauritania. Physical characteristics: Single stone. Partial fusion crusted exterior. A saw cut reveals mm-size white feldspar and light green pyroxene grains, a few oxide-stained metal grains present. Friable. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately equal amounts of pyroxene and plagioclase, unbrecciated, shock melt pockets with vesicles are present. Accessory low-Ni iron metal and chromite observed. Geochemistry: (C. Agee and M. Spilde, UNM) Pigeonite Fs37.3±2.4Wo8.2±3.7, Fe/Mn=26±1, n=12; plagioclase An96.0±0.2, n=7; shock melt (proxy for bulk composition) SiO2=46.7±0.3, TiO2=0.01±0.01, Al2O3=14.3±0.4, Cr2O3=0.31±0.02, MgO=11.1±0.2, FeO=13.5±0.2, MnO=0.52±0.03, NiO=0.02±0.02, CaO=10.3±0.2, Na2O=0.19±0.02, K2O=0.02±0.01 (all wt%), Mg#=59.3±0.1, n=3. Classification: Achondrite (cumulate eucrite). Specimens: 20.1 g including a probe mount on deposit at UNM, DPitt holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB105 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) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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