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Northwest Africa 6976
Basic information Name: Northwest Africa 6976
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6976
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 128 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 532 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 6 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6976 (NWA 6976)

(Northwest Africa)

Purchased: 2011

Classification: Carbonaceous chondrite (CM2)

History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Black individual lacking any fusion crust.

Petrography: Brecciated carbonaceous chondrite composed of chondrules (mean diameter about 0.25 mm), chondrule pseudomorphs, CAIs, and mineral fragments set into abundant Fe-rich matrix. Many of the components are surrounded by fine-grained dust rims. The fine-grained meteorite matrix consists of abundant sulfides, Ca-carbonates, and phyllosilicates confirmed by their flaky appearance and low matrix totals.

Geochemistry: Matrix analyses total: 89.9 wt% (10 μm defocused beam, n=10)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2011
Mass (g):128
Pieces:1
Class:CM2
Shock stage:S2
Weathering grade:low
Fayalite (mol%):26.4±23.4 (0.5-68.1, n=21)
Ferrosilite (mol%):2.1±0.5 (1.2-3.1, n=16)
Wollastonite (mol%):2.3±1.3 (0.9-4.2, n=16)
Classifier:A. Greshake, MNB
Type spec mass (g):20
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
DCOM   
METEORITES AUSTRALIA   
Public domain photographs:
Ansgar Greshake         
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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