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Northwest Africa 12550
Basic information Name: Northwest Africa 12550
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12550
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 16.4 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 330 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 15 May 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12550 (NWA 12550)

Morocco

Purchased: 2019 Jan

Classification: Martian meteorite (Shergottite)

History: Purchased in Essaouira in January 2019

Physical characteristics: Single stone, 70% covered by fusion crust. Cut surface reveals a fine grained dark green interior.

Petrography: (J. Gattacceca, CEREGE) Crystalline rock with doleritic texture. Pyroxenes (typical size 200 μm, strongly zoned) are set in maskelynite (150 μm). Other minerals: Fe sulfide, ilmenite (30 μm).

Geochemistry: Pyroxene Fs39.3±11.3Wo18.8±6.2, range Fs28.2-63.1, Fe/Mn=33.5±2.3 (n=11). Maskelynite An52.2±0.9Ab46.5±0.7Or1.3±0.2 (n=3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.46.

Classification: Martian meteorite (Shergottite)

Specimens: Type specimen at CEREGE. 0.73 g at ULB. Main mass with Kuntz.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Essaouira (Morocco)
Date:P 2019 Jan
Mass (g):16.43
Pieces:1
Class:Martian (shergottite)
Magnetic suscept.:3.46
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):3.50
Type spec location:CEREGE
Main mass:Fabien Kuntz
Comments:work name K395; 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 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
ULB: Université libre de Bruxelles Avenue Franklin Roosevelt 50 - 1050 Bruxelles, Belgium (institutional address; updated 27 Sep 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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