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Northwest Africa 13438
Basic information Name: Northwest Africa 13438
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13438
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 63.5 g
Classification
  history:
Recommended:  CO3    [explanation]

This is 1 of 639 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 2 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13438 (NWA 13438)

(Northwest Africa)

Purchased: 2020 February

Classification: Carbonaceous chondrite (CO3)

History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite shows a dark brownish interior and is predominantly composed of abundant small and mostly porphyritic chondrules, CAIs, and mineral fragments set into a fine-grained matrix. Chondrules have a mean diameter of about 0.2 mm. Opaques phases are metal and troilite and their respective weathering products.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2020 February
Mass (g):63.5
Pieces:1
Class:CO3
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):15.3±15.9 (1.3-46.0, n=17)
Ferrosilite (mol%):1.9±0.7 (1.1-3.0, n=12)
Wollastonite (mol%):1.0±0.2 (0.8-1.4, n=12)
Classifier:A. Greshake, MNB
Type spec mass (g):14.7
Type spec location:MNB
Main mass:Kuntz
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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