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Northwest Africa 12311
Basic information Name: Northwest Africa 12311
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12311
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 253 g
Meteoritical Bulletin:  MB 108  (2020)  L6-melt breccia
Recommended:  L6-melt breccia    [explanation]

This is 1 of 70 approved meteorites classified as L6-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 6 Oct 2019
Writeup from MB 108:

Northwest Africa 12311 (NWA 12311)


Purchased: 2018

Classification: Ordinary chondrite (L6, melt breccia)

History: (Ziyao Wang) Purchased by Ziyao Wang from Adnane Sami during the China (Hunan) Mineral & Gem Show in Chenzhou City in May 2018.

Physical characteristics: (Ziyao Wang) Black-brown stone of 253 g with rusty fusion crust with adhering sand grains.

Petrography: (R. Bartoschewitz, Bart) Chondrule and mineral fragments of L6 petrology up to 20 mm are set in a dark melt-rock martix, with ~20 µm, mostly rounded metal/sulfide inclusions.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.3±0.5 (n=16); pyroxene Fs20.8±0.4Wo1.6±0.2 (n=9); chromite CRAL86, FFM81. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.77

Classification: Ordinary chondrite (L-melt rock with L6 fragments)

Specimens: 20.2 g on deposit at Kiel, Ziyao Wang holds the main mass, and 23 g with Bart. Polished thin sections Bart and IfP

Data from:
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Chenzhou, Hunan
Date:P 2018
Mass (g):253
Class:L6-melt breccia
Fayalite (mol%):24.3±0.5 (n=16)
Ferrosilite (mol%):20.8±0.4 (n=9)
Wollastonite (mol%):1.6±0.2
Magnetic suscept.:4.77
Classifier:R. Bartoschewitz
Type spec mass (g):20.2
Type spec location:Kiel
Main mass:Ziyao Wang
Comments:working name WZ37; submitted by R. Bartoschewitz
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
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)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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