Meteoritical Bulletin: Entry for Northwest Africa 2639

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Northwest Africa 2639

Basic information

Name: Northwest Africa 2639
This is an OFFICIAL meteorite name.
Abbreviation: NWA 2639
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass: 539 g

Classification
history:

Meteoritical Bulletin:	MB 89	(2005)	Mesosiderite
MetBase:	v. 7.1	(2006)	Mesosiderite
Recommended:			Mesosiderite [explanation]

This is 1 of 273 approved meteorites classified as Mesosiderite. [show all]
Search for other: Mesosiderites, Metal-rich meteorites

Writeup

Writeup from MB 89:

Northwest Africa 2639

Northwest Africa

Purchased 2004

Mesosiderite

Three complete stones weighing 539 g in total with black to brown surfaces, were purchased in Erfoud, Morocco. Description and classification (T. Bunch and J. Wittke, NAU): mesosiderite with nearly equal portions of metal and silicates; metal composed of mostly continuous aggregates of metal balls (0.2-0.4 mm diameter) that resemble grape clusters and enclose clumps of silicates. Orthopyroxene, Fs_23.1-25.5Wo_1.7-3.3 (FeO/MnO = 23.5-27.9); plagioclase, An_88.9; chromite, cr# = 82; metal, Ni = 6.1-7.0 wt. %, merrillite and troilite. Shock level moderate and a weathering grade of W1. Specimens: type specimen, 21.1 g, NAU; main mass, A. Hupe.

Data from:
  MB89
  Table 7
  Line 349:

Place of purchase:	Erfoud
Date:	2004
Mass (g):	539
Pieces:	3
Class:	Mes
Classifier:	Ted Bunch, NAU
Type spec mass (g):	21.1
Type spec location:	NAU

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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