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Northwest Africa 11839
Basic information Name: Northwest Africa 11839
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11839
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1.84 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 504 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 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11839 (NWA 11839)

(Northwest Africa)

Purchased: 2017

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: Several small dark grayish to black fragments some of which partly covered with fusion crust.

Petrography: The meteorite is a brecciated carbonaceous chondrite composed of small chondrules (mean diameter about 250 μm), CAIs, and mineral fragments often surrounded by fine-grained dust rims. The ferroan matrix contains abundant sulfides, almost pure calcite and fibrous phyllosilicates.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):1.84
Pieces:1
Class:CM2
Shock stage:S1
Weathering grade:low
Fayalite (mol%):17.6±14.6 (1.0-43.6, n=28)
Ferrosilite (mol%):2.0±0.5 (1.3-2.8, n=19)
Wollastonite (mol%):0.9±0.4 (0.4-1.5, n=19)
Classifier:A. Greshake, MNB
Type spec mass (g):0.38
Type spec location:MNB
Main mass:Vincent Gira
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6505 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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