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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:
Meteoritical Bulletin:  MB 109  (2021)  CO3
Recommended:  CO3    [explanation]

This is 1 of 653 approved meteorites (plus 2 unapproved names) 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 Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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