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Northwest Africa 7388
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:help 50.8 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 48 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 1 Jan 2013
Writeuphelp
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:
Place of purchase:Morocco
Date:P 2007
Mass (g):50.8
Pieces:1
Class:Brachinite
Shock stage:low
Weathering grade:low
Fayalite (mol%):27.9-29.8
Ferrosilite (mol%):9.0-9.1
Wollastonite (mol%):47.4-47.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):10.4
Type spec location:UWB
Main mass:P.Mani
Comments:PCM12-1; submitted by A. Irving
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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