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Northwest Africa 13547
Basic information Name: Northwest Africa 13547
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13547
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 17 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 546 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 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13547 (NWA 13547)

(Northwest Africa)

Purchased: 2020

Classification: Carbonaceous chondrite (CM2)

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

Physical characteristics: Black individual with some fusion crust.

Petrography: The meteorite is a chondritic breccia composed of small (about 0.1-0.4 mm in diameter) chondrules, chondrule pseudomorphs, mineral fragments and rare CAIs most of which are surrounded by fine-grained dust rims set into an abundant fine-grained matrix. Matrix constituents include phyllosilicates with fibrous appearance, carbonates, and rare sulfides. Only few FeNi spheres were found enclosed within forsteritic olivine. No pyroxene has been detected.

Geochemistry: mean values of defocused matrix analyses (beam diameter 5 µm; all wt%; N=12): SiO2: 28.3, TiO2: 0.03, Na2O: 0.18, Cr2O3: 0.43, MgO: 16.2, MnO: 0.10, FeO: 21.6, Al2O3: 2.46, NiO: 1.94, P2O5: 0.14, S: 2.21, Total: 73.59

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):17
Pieces:1
Class:CM2
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.5±18.5 (0.5-66.4, n=23)
Classifier:A. Greshake, MNB
Type spec mass (g):3.9
Type spec location:MNB
Main mass:Larbi Chnaoui
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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