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Northwest Africa 8734 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8734 This is an OFFICIAL meteorite name. Abbreviation: NWA 8734 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: 61.6 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 93 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 4 Feb 2015 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 104:
Northwest Africa 8734 (NWA 8734) (Northwest Africa) Found: 2014 Classification: Primitive achondrite (Lodranite) History: Recovered in April 2014 near the borders of Mauritania, Western Sahara and Algeria. Purchased in Mauritania in June 2014. Physical characteristics: A single stone with weathered exterior. A saw cut reveals primarily dark colored, coarse grains (~1-2 mm), with a few scattered lighter grains in a dark matrix. Petrography: (C. Agee, UNM) Microprobe examination of the deposit sample, shows a poikilitic to granulitic texture of pyroxene and olivine grains. Plagioclase makes up approximately 10% of this meteorite. Accessory phases include Fe-Ni metal, iron oxide veinlets, chromite, apatite, and Fe-P blebs. Geochemistry: (C. Agee and N. Muttik, UNM). olivine Fa12.6±0.1, Fe/Mn=23±1, n=11; low-Ca pyroxene Fs11.5±0.6Wo1.9±0.5, Fe/Mn=14±0, n=8; diopside Fs3.3±1.3Wo46.3±1.0, Fe/Mn=9±3, Cr2O3=1.33±0.03 (wt%), n=6; subcalcic augite Fs5.6±0.6Wo28.0±0.4, Fe/Mn=17±2, n=4; plagioclase An14.6±4.6Ab82.1±3.6Or3.3±1.1, n=6. Classification: Primitive achondrite (lodranite). Classification based on relatively coarse grain-size compared to acapulcoites. Moderate weathering grade, low shock stage. Specimens: A total of 13 g including a probe mount on deposit at UNM. DPitt holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB104 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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