Meteoritical Bulletin: Entry for Northwest Africa 11309

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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: 22 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Ureilite
Recommended:			Ureilite [explanation]

This is 1 of 660 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 19 Jun 2017

Writeup

help

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: Fa_17.9±7.1; Cr₂O₃=0.6-0.8 wt.% (n=19); reduced rims present. Pyroxene: Fs_4.1Wo_4.9; 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, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Alan Mazur

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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