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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:help 17.8 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 189 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 21 Sep 2019
Writeuphelp
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 Fs22.2±5.7Wo2.0±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)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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