Meteoritical Bulletin: Entry for Northwest Africa 2638

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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: 50.5 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	H4
Recommended:			H4 [explanation]

This is 1 of 6407 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

Writeup

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 (Fa_17.9±0.2(range Fa_17.7-18.3, N = 5), low-Ca pyroxene (Fs_15.5±1.5Wo_0.4±0.1(range Fs_13.8-16.6Wo_0.5-0.3, 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:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
The Hupe Collection

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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