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Northwest Africa 8778
Basic information Name: Northwest Africa 8778
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8778
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 391 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 17 Nov 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8778 (NWA 8778)

(Northwest Africa)

Purchased: 2014 Apr

Classification: Ordinary chondrite (H3)

History: Purchased by Darryl Pitt in April 2014 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Fairly closely-packed, relatively small, well-formed chondrules occur in a stained metal-rich matrix rich. Minerals are olivine (some with very forsteritic cores), orthopyroxene, pigeonite, augite, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (core Fa0.7; predominantly Fa16.8-17.3, mean Fa17.1, N = 7), orthopyroxene (Fs3.8-37.7Wo0.1-4.3, N = 3), pigeonite (Fs4.3Wo22.7), augite (Fs4.3Wo40.9). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.89.

Classification: Ordinary chondrite (H3).

Specimens: 24.1 g including one polished thin section at UWB; the remainder is held by DPitt.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2014 Apr
Mass (g):390.7
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.7-17.3
Ferrosilite (mol%):3.8-37.7
Wollastonite (mol%):0.1-4.3
Magnetic suscept.:4.89
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.1
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 57; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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