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Northwest Africa 8439
Basic information Name: Northwest Africa 8439
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8439
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 26 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 230 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Jun 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8439 (NWA 8439)

(Northwest Africa)

Purchased: 2013 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased in 2013 in Tucson

Physical characteristics: Broken and wind ablated stone with remnants of fusion crust. Cut surface reveals a light gray brecciated interior.

Petrography: (J. Gattacceca, CEREGE) Brecciated ophitic to subophitic basalt with grain size to 1 mm. Mineralogy: low Ca-pyroxene with augite exsolution, plagioclase, accessory ilmenite, silica, chromite, troilite, rare metal.

Geochemistry: Orthopyroxene Fs58.2-61.2Wo5.0-3.1, FeO/MnO = 33.1. Plagioclase An91.8 Or0.3. Magnetic susceptibility log χ = 2.65  (χ in 10-9 m3/kg).

Classification: Achondrite (basaltic monomict eucrite). Strong weathering.

Specimens: 23 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):26
Pieces:1
Class:Eucrite-mmict
Weathering grade:high
Ferrosilite (mol%):58.2-61.2
Wollastonite (mol%):5.0-3.1
Magnetic suscept.:2.65
Classifier:J. Gattacceca, M. Aboulahris, CEREGE
Type spec mass (g):23
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 29 Oct 2018)
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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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