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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 573 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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