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Northwest Africa 11231
Basic information Name: Northwest Africa 11231
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11231
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 280 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 477 approved meteorites classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 10 May 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11231 (NWA 11231)

(Northwest Africa)

Purchased: 2017 March

Classification: Carbonaceous chondrite (CO3)

Petrography: (K. Metzler, IfP) Chondrules, chondrule fragments, and CAIs are embedded in a fine-grained brownish matrix (about 20 vol% matrix). Most chondrules belong to chemical type I. Mean apparent chondrule size: 130±100 μm (40-830 μm; n=83).

Geochemistry: Random measurements of olivine grains revealed Fa8.6±15.5 (1-58); n=26. Random measurements of low-Ca pyroxene grains revealed Fs2.2±1.9Wo1.0±0.3 (Fs1-6Wo0-2); n=17.

Classification: CO chondrite based on CAI occurrence, small chondrule size, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Goulmima, Morocco
Date:P 2017 March
Mass (g):280
Pieces:8
Class:CO3
Shock stage:S1
Weathering grade:Medium
Fayalite (mol%):8.6±15.5
Ferrosilite (mol%):2.2±1.9
Wollastonite (mol%):1.0±0.3
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Nourddine Azelmat, Morocco
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5838 approved meteorites from (Northwest Africa) (plus 2066 unapproved names)

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