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Northwest Africa 8421
Basic information Name: Northwest Africa 8421
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8421
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 696 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  H3
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 29 Jan 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8421 (NWA 8421)

(Northwest Africa)

Purchased: 2014 Mar

Classification: Ordinary chondrite (H3)

History: Purchased in Temara, Morocco by Adam Aaronson in March 2014.

Petrography: (A. Irving and S. Kuehner, UWS) Small (0.9±0.6 mm), well-formed chondrules in a stained metal-rich matrix.

Geochemistry: Olivine, Fa0.3-26.9; Cr2O3 in ferroan olivine = 0.05-0.10 wt.%, mean 0.07±0.02 wt.%, N = 7; orthopyroxene, Fs2.1-25.5Wo0.7-1.4, N = 3; pigeonite, Fs12.9Wo17.2; subcalcic augite, Fs11.6Wo30.6.

Classification: Ordinary chondrite (H3).

Specimens: 21 g including one polished thin section at UWB. The remainder is held by Aaronson.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2014 Mar
Mass (g):696
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.3-26.9
Ferrosilite (mol%):2.1-25.5
Wollastonite (mol%):0.7-1.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1682; submitted by A. Irving
Institutions
   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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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