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Northwest Africa 12307
Basic information Name: Northwest Africa 12307
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12307
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 34.1 g
Meteoritical Bulletin:  MB 108  (2020)  L6
Recommended:  L6    [explanation]

This is 1 of 12284 approved meteorites (plus 8 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Jul 2019
Writeup from MB 108:

Northwest Africa 12307 (NWA 12307)


Purchased: 2018

Classification: Ordinary chondrite (L6)

History: (Ziyao Wang) Purchased by Ziyao Wang from Fayssal Mezgouri during the China (Hubei) Mineral & Gem Show in Huangshi City in Sept 2018.

Physical characteristics: (Ziyao Wang) 34.1 g black stone with a smooth surface

Petrography: (R. Bartoschewitz, Bart) Poorly defined chondrules in strongly recrystallized matrix. The meteorite is heavily brecciated with melt pockets, mosaicism in olivine, and feldspar is mainly isotropic. Cleavages and fractures are blackened by penetrated metal and sulfide.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.1±0.4 (n=12); pyroxene Fs20.5±0.5Wo1.3±0.3 (n=7); feldspar An23Or5; Chromite CRAL86, FFM84; merrillite. Kamacite Ni=6.8, Co=1.2 wt-% (n=1). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.81

Classification: Ordinary chondrite (L6, S4, W2)

Specimens: 6.42 g at Kiel and 0.43 g at Münster on deposit, Ziyao Wang holds the main mass, and 5 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):34.1
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):24.1±0.4 (n=12)
Ferrosilite (mol%):20.5±0.5 (n=7)
Wollastonite (mol%):1.3±0.3
Magnetic suscept.:4.81
Classifier:R. Bartoschewitz
Type spec mass (g):6.42 + 0.43
Type spec location:Kiel + IfP
Main mass:Ziyao Wang
Comments:working name WZ33; 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 1972 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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