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Northwest Africa 2631
Basic information Name: Northwest Africa 2631
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2631
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 2.7 kg
Meteoritical Bulletin:  MB 106  (2018)  H5
Recommended:  H5    [explanation]

This is 1 of 10565 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Oct 2017
Writeup from MB 106:

Northwest Africa 2631 (NWA 2631)

(Northwest Africa)

Purchased: 2004

Classification: Ordinary chondrite (H5)

History: Purchased by Michael Farmer in 2004 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch, NAU) Sparse chondrules occur in a recrystallized matrix containing lightly stained metal.

Geochemistry: Olivine (Fa19.5-19.7, N = 3), orthopyroxene (Fs16.5-16.7Wo1.9-1.4; N = 2), clinopyroxene (Fs5.6-6.1Wo45.7-44.9, N = 2).

Classification: Ordinary chondrite (H5).

Specimens: 25.8 g plus one polished thin section at PSF; remainder with Farmer.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004
Mass (g):2700
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):19.5-19.7
Ferrosilite (mol%):16.5-16.7
Wollastonite (mol%):1.9-1.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):25.8
Type spec location:PSF
Main mass:M. Farmer
Comments:Work name F7; submitted by A. Irving
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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