Meteoritical Bulletin: Entry for Northwest Africa 8438

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Northwest Africa 8438

Basic information

Name: Northwest Africa 8438
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8438
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 16 g

Classification
history:

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

This is 1 of 446 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 8438 (NWA 8438)

(Northwest Africa)

Purchased: 2013 Jun

Classification: HED achondrite (Howardite)

History: Purchased in 2013 in Ensisheim

Physical characteristics: Cut surface reveals a dark 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. Some melt clasts are present.

Geochemistry: Eucrite: Orthopyroxene Fs_53.7-62.2Wo_10.8-3.2, FeO/MnO = 32.7, diogenite clasts: Orthopyroxene Fs_26.9Wo_3.0, FeO/MnO = 32.7. Plagioclase An_93.8Or_0.2.Magnetic susceptibility log χ = 3.32 (χ in 10^-9 m³/kg).

Classification: Achondrite (howardite). Strong weathering.

Specimens: 4 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Ensisheim
Date:	P 2013 Jun
Mass (g):	16
Pieces:	1
Class:	Howardite
Weathering grade:	high
Ferrosilite (mol%):	53.7-62.2 (eucrite) , 26.9 (diogenite)
Wollastonite (mol%):	10.8-3.2 (eucrite), 3.0 (diogenite)
Magnetic suscept.:	3.32
Classifier:	J. Gattacceca, M. Aboulahris, CEREGE
Type spec mass (g):	4
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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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