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Northwest Africa 13886
Basic information Name: Northwest Africa 13886
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13886
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 189 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 636 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 23 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13886 (NWA 13886)

(Northwest Africa)

Purchased: 2020

Classification: Carbonaceous chondrite (CO3)

Physical characteristics: A dark stone. Cut surface reveals a dark interior with small chondrules.

Petrography: (J. Gattacceca, CEREGE) Small chondrules (~150 µm in diameter) set in an abundant fine-grained iron-rich matrix. CAIs were observed in the studied section. Opaque minerals are metal and troilite. Terrestrial weathering is strong.

Geochemistry: Olivine Fa18.1±18.5, range Fa0.6-46.0 (n=15), Cr2O3 in ferroan olivine 0.30±0.14 (n=12). Low-Ca pyroxene Fs2.4±0.9Wo2.5±1.1 (n=3). Ca-pyroxene Fs19.9Wo42.8 (n=1). Defocalized matrix analyses FeO = 51.9±2.6 wt%, analytical total 85.2±2.2 (n=3).

Classification: Carbonaceous chondrite (CO3)

Specimens: Type specimen at CEREGE. Main mass with Labenne.

Data from:
  MB110
  Table 0
  Line 0:
Date:P 2020
Mass (g):189
Pieces:1
Class:CO3
Weathering grade:high
Fayalite (mol%):18.1±18.5 (n=15)
Ferrosilite (mol%):2.4±0.9 (n=3)
Wollastonite (mol%):2.5±1.1
Magnetic suscept.:4.68
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):22
Type spec location:CEREGE
Main mass:Labenne
Finder:anonymous
Comments:work name LL230620c; submitted by Jérôme Gattacceca
Institutions
   and collections		 CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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