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Northwest Africa 7398
Basic information Name: Northwest Africa 7398
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7398
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 118.3 g
Meteoritical Bulletin:  MB 103  (2014)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 63 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 8 Nov 2014
Writeup from MB 103:

Northwest Africa 7398 (NWA 7398)

(Northwest Africa)

Purchased: 2012 Jun

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Darryl Pitt in June 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh breccia composed mainly of diogenitic debris (from several different protoliths) with sparse basaltic eucrite clasts. There are at least three types of orthopyroxene, olivine, Al-bearing chromite, troilite, stained Ni-poor metal, exsolved pigeonite, calcic plagioclase, and silica (in eucrite clasts).

Geochemistry: Diogenitic orthopyroxene (Fs21.9Wo2.3; Fs23.5Wo2.7; Fs28.5Wo4.3; FeO/MnO = 27-31, N = 3), olivine (Fa44.3; FeO/MnO = 51), orthopyroxene host (Fs60.4-60.7Wo4.4-4.3; FeO/MnO = 32), exsolution lamellae Fs29.7-31.3Wo40.1-39.7; FeO/MnO = 31-33).

Classification: Diogenite (polymict breccia).

Specimens: 20.2 g and one polished thin section at UWB. DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012 Jun
Mass (g):118.3
Shock stage:low
Weathering grade:low
Fayalite (mol%):44.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:DPitt
Comments:DP719; submitted by A. Irving
   and collections
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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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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     This is 1 of 9729 approved meteorites from (Northwest Africa) (plus 1859 unapproved names)

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