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Northwest Africa 8622
Basic information Name: Northwest Africa 8622
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8622
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 104 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 516 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 25 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8622 (NWA 8622)

Morocco

Purchased: 2013

Classification: Ureilite

History: Purchased in 2013 in Agadir

Physical characteristics: Full oriented stone. Light gray fusion crust with flow lines.

Petrography: (J. Gattacceca, CEREGE) Consists mostly of euhedral olivine with reduced margin. Grain size 1.5 mm. Metal and weathering products around grains and as micrometrer-sized blebs in the olivine. Carbon (graphite or diamond) clusters are present.

Geochemistry: Olivine cores Fa21.4±0.1 (N=4), FeO/MnO=46.0. Olivine CaO 0.37 wt.%, Cr2O3=0.75 wt.%. Olivine rim Fa12.4 (N=1). Pigeonite Fs14.7Wo7.2 (N=1). Magnetic susceptibility log χ = 4.39 (χ in 10-9 m3/kg).

Classification: Ureilite. Strong weathering

Specimens: 20 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2013
Mass (g):104
Pieces:1
Class:Ureilite
Weathering grade:high
Fayalite (mol%):21.2±0.1
Ferrosilite (mol%):14.7
Wollastonite (mol%):7.2
Magnetic suscept.:4.39
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):21
Type spec location:CEREGE
Main mass:Labenne Luc
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
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1417 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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