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Northwest Africa 2638
Basic information Name: Northwest Africa 2638
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2638
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 50.5 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  H4
Recommended:  H4    [explanation]

This is 1 of 6006 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 2638 (NWA 2638)

(Northwest Africa)

Purchased: 2004

Classification: Ordinary chondrite (H4)

History: Purchased by Adam Hupe in 2004 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU; T. Bunch and J. Wittke, NAU) Well-formed, relatively small chondrules are set in a relatively coarse grained matrix containing abundant altered metal.

Geochemistry: Olivine (Fa17.9±0.2 (range Fa17.7-18.3, N = 5), low-Ca pyroxene (Fs15.5±1.5Wo0.4±0.1 (range Fs13.8-16.6Wo0.5-0.3, N = 3).

Classification: Ordinary chondrite (H4).

Specimens: 11.5 g including one polished thin section at PSF; remainder with AHupé.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004
Mass (g):50.5
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):17.9±0.2
Ferrosilite (mol%):15.5±1.5
Wollastonite (mol%):0.4±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):11.5
Type spec location:PSF
Main mass:A. Hupe
Comments:Work name A1005; submitted by A. Irving
Institutions
   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)
AHupé: Adam C. Hupé, 2807 China Cove, Laughlin, NV 89029, United States; Website (private address; updated 29 Jun 2013)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
The Hupe Collection   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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