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Northwest Africa 8476
Basic information Name: Northwest Africa 8476
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8476
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 1570 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  diogenite
Recommended:  diogenite    [explanation]

This is 1 of 437 approved meteorites classified as diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 18 Jul 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8476 (NWA 8476)

Tan Tan, Morocco

Purchased: 2013 Jun 4

Classification: HED achondrite (Diogenite)

History: Found in the Tan Tan region, Morocco, and purchased in Erfoud in June 2013.

Physical characteristics: Many fragments consisting of a homogeneous assemblage of mm sized green minerals

Petrography: (C. Cournède, J. Gattacceca, CEREGE): Main minerals are orthopyroxene with typical grain size 2 to 5 mm. Accessory chromite, silica. Metal is observed as aligned droplets (25 μm) in pyroxene crystals.

Geochemistry: Orthopyroxene Fs28.5±0.4 Wo3.0±0.2 (n=5). FeO/MnO=31.3±3.1. Chromite Cr#=72%. Magnetic susceptibility log χ = 2.90 (χ in 10-9 m3/kg).

Classification: Diogenite. Moderate weathering.

Specimens: 20.5 g at CEREGE. Main mass with P. Thomas.

Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Tan Tan
Place of purchase:Erfoud, Morocco
Date:P 2013 Jun 4
Mass (g):1570
Pieces:many
Class:diogenite
Weathering grade:moderate
Ferrosilite (mol%):28.5±0.4
Wollastonite (mol%):3.0±0.2
Magnetic suscept.:2.90
Classifier:C. Cournède and J. Gattacceca, CEREGE
Type spec mass (g):20.5
Type spec location:CEREGE
Main mass:P. Thomas
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)
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:

Morocco
Coordinates:Unknown.

Statistics:
     This is the only approved meteorite from Tan Tan, Morocco
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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