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Northwest Africa 8618
Basic information Name: Northwest Africa 8618
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8618
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 25.2 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  CM2
Recommended:  CM2    [explanation]

This is 1 of 539 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 29 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8618 (NWA 8618)

Morocco

Purchased: 2014

Classification: Carbonaceous chondrite (CM2)

History: Purchased in 2014 in Layoune

Physical characteristics: Two partially crusted dark stones. Cut surface reveals a dark gray interior with sparse small whitish chondrules

Petrography: (J. Gattacceca, CEREGE) Chondrules and mineral fragments in a fine-grained Fe-rich matrix. Abundant sulfides and magnetite, rare metal. Many chondrules have accretionary dust mantles. Average chondrule size 320±160 μm. Matrix: chondrules+mineral fragments abundances are 7:3 (by point counting, N=235).

Geochemistry: Olivine Fa14.6±19.4 (Fa0.5-46.6, N=13). Cr2O3 in ferroan olivine 0.34±0.15 wt% (N=6). Orthopyroxene Fs1.9-37.8Wo1.0-1.7 (N=2). Magnetic susceptibility log χ = 4.29 (χ in 10-9 m3/kg).

Classification: Carbonaceous chondrite (CM2)

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):25.2
Pieces:2
Class:CM2
Fayalite (mol%):14.6±19.4 (N=13)
Ferrosilite (mol%):19.8±18.0 (N=2)
Wollastonite (mol%):1.3±0.3
Magnetic suscept.:4.29
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 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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