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Northwest Africa 13337
Basic information Name: Northwest Africa 13337
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13337
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 467 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 195 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 4 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13337 (NWA 13337)

(Northwest Africa)

Purchased: 2019

Classification: Mesosiderite

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

Physical characteristics: Dark grayish rock without fusion crust.

Petrography: The meteorite displays a grayish interior and is composed of silicate (about 50 vol%) and metallic (about 50 vol%) portions. The silicate fraction is predominantly composed of exsolved pyroxene, up to 2.5 mm sized compositionally zoned low-Ca pyroxene, and calcic plagioclase. Minor phases are silica, ilmenite, Ti-chromite, FeS, and merrillite. The metallic lithology consists of most abundant kamacite and some taenite. No olivine has been detected in the section studied.

Geochemistry: compositionally zoned low-Ca pyroxene: Fs24.0±7.2Wo1.4±0.7 (Fs17.5-37.8Wo0.9-2.9, n=12, FeO/MnO=23-32); low-Ca pyroxene host to exsolutions: Fs39.3±0.9Wo3.1±0.4 (Fs38.2-40.9Wo2.5-3.7, n=13, FeO/MnO=20-23); Ca-pyroxene exsolutions: Fs17.6±0.6Wo42.9±0.6 (Fs15.9-18.1Wo42.1-44.7, n=12, FeO/MnO=16-18); calcic plagioclase: An91.3±2.2 (An86.1-93.6, n=14)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):467
Pieces:1
Class:Mesosiderite
Shock stage:S2
Weathering grade:low
Ferrosilite (mol%):24.0; 39.3; 17.6
Wollastonite (mol%):1.4; 3.1; 42.9
Classifier:A. Greshake, MNB
Type spec mass (g):21.5
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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