Meteoritical Bulletin: Entry for Northwest Africa 12312

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Northwest Africa 12312

Basic information

Name: Northwest Africa 12312
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12312
Observed fall: No
Year found: 2017
Country: Morocco
Mass: 303 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	L6
Recommended:			L6 [explanation]

This is 1 of 12068 approved meteorites (plus 6 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

help

Writeup from MB 108:

Northwest Africa 12312 (NWA 12312)

Morocco

Purchased: 2017

Classification: Ordinary chondrite (L6)

History: (Ziyao Wang) Purchased by Ziyao Wang from Mr. Ayman during the China (Hunan) Mineral & Gem Show in Chenzhou City in Nov. 2017.

Physical characteristics: (Ziyao Wang) 303 g red-brown and black stone without fusion crust

Petrography: (R. Bartoschewitz, Bart) chondrule relicts and mineral fragments in a recrystallized matrix. Meteorite is mostly shock-darkened with abundant shock veins. Feldspar is transformed to maskelynite.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa_25.7±0.6(n=16); pyroxene Fs_20.9±0.1Wo_1.7±0.1(n=2); feldspar An₁₉Or₇(n=5); chromite CRAL87, FFM88 (n=2). Kamacite Ni=7.3, Co=0.8 wt-% (n=2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.79

Classification: Ordinary chondrite (L6, S5, W1)

Specimens: 21.2 g on deposit at Kiel, Ziyao Wang holds the main mass, and 26 g with Bart. Polished thin sections Bart and IfP

Data from:
  MB108
  Table 0
  Line 0:

Origin or pseudonym:	desert
Place of purchase:	Beijing
Date:	P 2017
Mass (g):	303
Pieces:	1
Class:	L6
Shock stage:	S5
Weathering grade:	W1
Fayalite (mol%):	25.7±0.6 (n=17)
Ferrosilite (mol%):	20.9±0.1 (n=2)
Wollastonite (mol%):	1.7±0.1
Magnetic suscept.:	4.79
Classifier:	R. Bartoschewitz
Type spec mass (g):	21.2
Type spec location:	Kiel
Main mass:	Ziyao Wang
Finder:	anonymous
Comments:	working name WZ39; submitted by R. Bartoschewitz

Institutions
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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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