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Northwest Africa 11309
Basic information Name: Northwest Africa 11309
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11309
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 22 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 419 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 19 Jun 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11309 (NWA 11309)

(Northwest Africa)

Find: 2016

Classification: Ureilite

History: Discovered by local people in 2016, purchased from M. Graul/Bernau in 2017.

Physical characteristics: One black-brown fragment of 22 g, partly covered by fusion crust. Polished face shows brown patches in dark matrix; some grain boundaries show vugs.

Petrography: (R. Bartoschewitz, Bart) Microprobe examination of a thin section shows olivine and minor pyroxene crystallites (grain size ~1.0 mm). Graphite abundant, diamonds and metal interstitial to silicates.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa17.9±7.1; Cr2O3=0.6-0.8 wt.% (n=19); reduced rims present. Pyroxene: Fs4.1Wo4.9; Cr2O3=0.6 wt.% (n=1). Ca-pyroxene: Fs7En69Wo24; Cr2O3=1.2 wt.% (n=1). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.70.

Classification: Ureilite

Specimens: 4.6 g on deposit at Kiel, main mass Alan Mazur

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Bernau/Germany
Date:2016
Mass (g):22
Pieces:1
Class:Ureilite
Fayalite (mol%):17.9±7.1 (n=19)
Ferrosilite (mol%):4.1 (n=1)
Wollastonite (mol%):4.9
Magnetic suscept.:4.70
Classifier:Bart
Type spec mass (g):4.6
Type spec location:Kiel
Main mass:A. Mazur
Finder:anonymous
Comments:Submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Lehmweg 53, D-38518 Gifhorn, Germany; Website (private address; updated 4 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5838 approved meteorites from (Northwest Africa) (plus 2066 unapproved names)

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