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Northwest Africa 12318
Basic information Name: Northwest Africa 12318
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12318
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 102.5 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 12318 (NWA 12318)

(Northwest Africa)

Purchased: 2008

Classification: Mesosiderite

History: Purchased from a meteorite dealer in Morocco in 2008

Physical characteristics: Five yellow brown oxidized fragments and splinter of totally 102.5 g

Petrography: (R. Bartoschewitz, Bart) composed mainly of orthopyroxene (up to 3 mm) and feldspar (up to 0.2 mm). Metal is completly altered and Fe-hydroxides fill cracks.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa16.5±1.2 (n=2); pyroxene Fs24.0±5.1 Wo1.92±1.3 (n=12); pigeonite En61Fs33Wo6 (n=2); feldspar An92Or<1 (n=21). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.29

Classification: Mesosiderite

Specimens: 17.86 g at Münster and 2.44 at Kiel on deposit, main mass with Alan Mazur and 8.6 g with Bart. Polished thin sections Bart and IfP

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2008
Mass (g):102.5
Pieces:5
Class:Mesosiderite
Shock stage:S1
Weathering grade:high
Fayalite (mol%):16.5±1.2 (n=2)
Ferrosilite (mol%):24.0±5.1 (n=12)
Wollastonite (mol%):1.9±1.3
Magnetic suscept.:4/29
Classifier:Bart
Type spec mass (g):17.86 + 2.44
Type spec location:IfP + Kiel
Main mass:A. Mazur
Finder:anonymous
Comments:NWA AM5; 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, 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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