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Northwest Africa 7388 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7388 This is an OFFICIAL meteorite name. Abbreviation: NWA 7388 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 58 approved meteorites classified as Brachinite. [show all] Search for other: Brachinites, Primitive achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 1 Jan 2013 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 7388 (NWA 7388) Northwest Africa Purchased: 2007 Classification: Primitive achondrite (Brachinite) History: Purchased by Philip Mani from Greg Hupé, who bought the stone from a Moroccan dealer in 2007. Physical characteristics: Very dark, rounded stone with partial black fusion crust. The interior is black and composed of interlocking grains. Petrography: (A. irving and S. Kuehner, UWS) Protogranular aggregate of olivine with less augite and accessory V-Ti-bearing chromite. Olivine contains rare inclusions of Ni-poor taenite, and chromite contains sparse inclusions of chlorapatite, merrillite and magnetite. Intergrowths of pure iron metal + orthopyroxene are present along olivine grain boundaries. Geochemistry: Olivine (Fa29.8, FeO/MnO = 56; rim Fa27.9), augite (Fs9.0-9.1Wo47.4-47.3; FeO/MnO = 58-60; Al2O3 = 1.2 wt.%; Cr2O3 = 0.8 wt.%). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave δ17O = 2.862, 2.705; δ18O = 5.635, 5.413; Δ17O = -0.113, -0.153 per mil. Classification: Brachinite. This specimen differs from other brachinites in having distinctive reaction assemblages along grain boundaries. Specimens: A total of 10.4 g of material and one polished thin section are on deposit at UWB. The main mass is held by Mr. P. Mani. | ||||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
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) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |