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Northwest Africa 8401
Basic information Name: Northwest Africa 8401
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8401
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 71 g
Meteoritical Bulletin:  MB 103  (2014)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 453 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 29 May 2014
Writeup from MB 103:

Northwest Africa 8401 (NWA 8401)

(Northwest Africa)

Purchased: 2014

Classification: HED achondrite (Howardite)

History: Purchased from Adam Aaronson in Tucson in 2014

Physical characteristics: Single stone with black, shiny fusion crust. Saw cut reveals a few dark scattered grains (~1 mm) set in a fine-grained light gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows isolated equilibrated cumulate eucrite clasts surrounded by a diogenitic breccia of variable grain size, some cataclastic, shock melt clasts are also present. Approximately 75% diogenite and 25% cumulate eucrite. Two distinct feldspar populations: anorthite and labradorite. Accessory iron metal, troilite, chromite, apatite, and silica.

Geochemistry: (C. Agee and N. Muttik, UNM) Diogenite low-Ca pyroxene Fs26.8±2.6Wo2.4±0.8, Fe/Mn=30±1, n=7; eucrite low-Ca pyroxene Fs36.9±2.9Wo1.6±0.7, Fe/Mn=34±2, n=6; clinopyroxene Fs26.3±0.9Wo18.4±2.3, Fe/Mn=30±1, n=2; anorthite An90.2±3.0Ab9.4±2.9Or0.4±0.1, n=6; labradorite An66.9±1.2Ab31.4±1.0Or1.7±0.2, n=3.

Classification: Achondrite (howardite)

Specimens: 14.5 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014
Mass (g):71
Classifier:C. Agee, UNM
Type spec mass (g):14.5
Type spec location:UNM
Main mass:D. Pitt
Comments:Field name M1314; submitted by C. Agee, UNM
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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