Meteoritical Bulletin: Entry for Northwest Africa 8437

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Northwest Africa 8437

Basic information

Name: Northwest Africa 8437
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8437
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 22 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Howardite
Recommended:			Howardite [explanation]

This is 1 of 451 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 6 Jun 2014

Writeup

Writeup from MB 103:

Northwest Africa 8437 (NWA 8437)

(Northwest Africa)

Purchased: 2013 Feb

Classification: HED achondrite (Howardite)

History: Purchased in 2013 in Tucson

Physical characteristics: Cut surface reveals a light gray brecciated interior.

Petrography: (J. Gattacceca, CEREGE) Brecciated crystalline rock composed mostly of pyroxene and plagioclase, with accessory silica, chromite, ilmenite, troilite, metal. Both eucrite and diogenite material are present. The pigeonite in the eucrite material has augite exsolution.

Geochemistry: Eucrite: Orthopyroxene Fs_53.4-60.5Wo_10.2-5.7, FeO/MnO = 32.0, diogenite clasts: Orthopyroxene Fs_25.0-34.1Wo_2.8-2.5, FeO/MnO = 28.3. Plagioclase An_90.6Or_0.3.Magnetic susceptibility log χ = 3.43 (χ in 10^-9 m³/kg)..

Classification: Achondrite (howardite). Moderate weathering.

Specimens: 5 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2013 Feb
Mass (g):	22
Pieces:	1
Class:	Howardite
Weathering grade:	moderate
Ferrosilite (mol%):	53.4-60.5 (eucrite) , 25.0-34.1 (diogenite)
Wollastonite (mol%):	10.2-5.7 (eucrite), 2.8-2.5 (diogenite)
Magnetic suscept.:	3.43
Classifier:	J. Gattacceca, M. Aboulahris, CEREGE
Type spec mass (g):	5
Type spec location:	CEREGE
Main mass:	Luc Labenne
Comments:	Submitted by J. Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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