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Northwest Africa 12746
Basic information Name: Northwest Africa 12746
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12746
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 12.1 g
Classification
  history:
Recommended:  CR2    [explanation]

This is 1 of 163 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 27 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12746 (NWA 12746)

(Northwest Africa)

Purchased: 2019

Classification: Carbonaceous chondrite (CR2)

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

Physical characteristics: Dark brownish fragment with some fusion crust.

Petrography: Carbonaceous chondrite composed of abundant mostly slightly flattened chondrules with an apparent mean diameter of about 900 μm and 30-40% almost black matrix. Some chondrules are metal-decorated. Olivine and low-Ca pyroxene are the most abundant silicates and olivine is predominantly very Fe-poor (Fo around 98 mol%); few compositionally zoned olivines with more Fe-rich rims are present.

Geochemistry: Matrix analyses yield an average total of 89.4 wt% (5 µm defocused beam, N=10) suggesting the presence of hydrous minerals.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2019
Mass (g):12.1
Pieces:1
Class:CR2
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):8.2±9.9 (0.9-38.3, n=19)
Ferrosilite (mol%):2.2±0.5 (1.5-3.1, n=17)
Wollastonite (mol%):0.9±0.1 (0.7-1.1, n=17)
Magnetic suscept.:5.2
Classifier:A. Greshake, MNB
Type spec mass (g):2.8
Type spec location:MNB
Main mass:Hanno Strufe
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. 108, in preparation (2019)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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