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Northwest Africa 8621
Basic information Name: Northwest Africa 8621
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8621
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 22 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  CK5
Recommended:  CK5    [explanation]

This is 1 of 162 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 29 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8621 (NWA 8621)

Morocco

Purchased: 2014

Classification: Carbonaceous chondrite (CK5)

History: Purchased in 2014 in Layoune

Physical characteristics: Cut surface reveals a dark grey interior.

Petrography: (J. Gattacceca, CEREGE) Millimeter-sized chondrules in a recrystallized matrix. Olivine is the dominant silicate. Plagioclase in matrix is typically 20-40 μm. Opaques are mainly troilite and magnetite

Geochemistry: Olivine Fa29.8±0.33 (Fa29.3-30.1, N=6), FeO/MnO=117±20, NiO 0.44±0.07 wt.%. Pyroxene Fs22.5Wo11.7 (N=1). Magnetite contains 3.3±0.1 wt.% Cr2O3, 0.67 wt.% Al2O3, 0.23 wt.% NiO (N=3). Magnetic susceptibility log χ = 4.65 (χ in 10-9 m3/kg).

Classification: Carbonaceous chondrite (CK5). Moderate weathering

Specimens: 6 g in CEREGE, main mass with Labenne

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Layoune
Date:P 2014
Mass (g):22
Pieces:1
Class:CK5
Weathering grade:moderate
Fayalite (mol%):29.8±0.3 (N=6)
Ferrosilite (mol%):22.5 (N=1)
Wollastonite (mol%):11.7
Magnetic suscept.:4.65
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):6
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
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1488 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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