Meteoritical Bulletin: Entry for Northwest Africa 12309

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Northwest Africa 12309

Basic information

Name: Northwest Africa 12309
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12309
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 17.8 g

Classification
history:

Recommended:

Mesosiderite [explanation]

This is 1 of 195 approved meteorites classified as Mesosiderite. [show all]
Search for other: Mesosiderites, Metal-rich meteorites

Comments:

Approved 21 Sep 2019

Writeup

Writeup from MB 108:

Northwest Africa 12309 (NWA 12309)

(Northwest Africa)

Purchased: 2015

Classification: Mesosiderite

History: (Ziyao Wang) Purchased by Ziyao Wang from Sbai Mohamed at the mineral show in Beijing in Nov. 2015

Physical characteristics: (Ziyao Wang) A 17.8 g dark yellowish stone

Petrography: (R. Bartoschewitz, Bart) composed mainly of orthopyroxene beside some pigeonite and feldspar. Metal is completly altered and Fe-hydroxides fill cracks.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Pyroxene Fs_22.2±5.7Wo_2.0±1.3(n=10); pigeonite En₅₈Fs₃₄Wo₈(n=2); feldspar An₉₂Or<1 (n=1). Altered metal: Fe~50, Ni~3 (all wt-%). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.66

Classification: Mesosiderite

Specimens: 3.97 g on deposit at Kiel, Ziyao Wang holds the main mass, and 1.3 g with Bart.

Data from:
  MB108
  Table 0
  Line 0:

Origin or pseudonym:	desert
Place of purchase:	Beijing
Date:	P 2015
Mass (g):	17.8
Pieces:	1
Class:	Mesosiderite
Ferrosilite (mol%):	22.2±5.7 (n=10)
Wollastonite (mol%):	2.0±1.3
Magnetic suscept.:	4.66
Classifier:	R. Bartoschewitz
Type spec mass (g):	3.97
Type spec location:	Kiel
Main mass:	Ziyao Wang
Finder:	anonymous
Comments:	working name WZ35; 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)
Beijing: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China (institutional address; updated 16 Oct 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108, in preparation (2019)

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Photos:

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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