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Northwest Africa 12313
Basic information Name: Northwest Africa 12313
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12313
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 439 g
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 May 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 12313 (NWA 12313)

Morocco

Purchased: 2018

Classification: Ordinary chondrite (H4)

History: (Ziyao Wang) Purchased by Ziyao Wang from Simo Mezgouri in Agadir Oct. 2018.

Physical characteristics: (Ziyao Wang) Reddish brown 439 g stone with very flat bottom, no fusion crust.

Petrography: (R. Bartoschewitz, Bart) very well defined chondrules (0.3-1.8 mm, av. 0.7 mm) of various types (PP, BO, POP) and chondrule fragments are set in dark matrix (about 15 vol% matrix). Chondrules mainly surrounded by metal-rich rims.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa16.0±1.2 (n=13); pyroxene Fs14.8±2.8Wo0.8±0.7 (n=13); silicates: Fe/Mn=25 Fe/Mg=0.22. Chromite CRAL90, FFM79 (n=2); spinel CRAL21, FFM39 (n=2). Kamacite in chondrules Ni=1.7, Co=0.4 (n=4). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.99

Classification: Ordinary chondrite (H4, S2, W4).

Specimens: 14.8 g at Kiel and 5.9 g at Münster, Ziyao Wang holds the main mass, and 28 g with Bart. Polished thin sections Bart and IfP

Data from:
  MB109
  Table 0
  Line 0:
Origin or pseudonym:desert
Place of purchase:Agadir, Morocco
Date:P 2018
Mass (g):439
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W4
Fayalite (mol%):16.0±1.2 (n=13)
Ferrosilite (mol%):14.8±2.8 (n=13)
Wollastonite (mol%):0.8±0.7
Magnetic suscept.:4.99
Classifier:R. Bartoschewitz
Type spec mass (g):14.8 + 5.9 g
Type spec location:Kiel + IfP
Main mass:Ziyao Wang
Finder:anonymous
Comments:working name WZ40.; 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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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