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Northwest Africa 13937
Basic information Name: Northwest Africa 13937
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13937
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1000 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 18 Jun 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13937 (NWA 13937)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Lunar meteorite (feldspathic breccia)

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

Physical characteristics: Eleven dark-grayish fragments without fusion crust.

Petrography: The meteorite displays a dark-grayish interior and is a feldspar-rich fragmental breccia predominantly composed of lithic and mineral clasts in partly shock melted and vesicular matrix. Lithic clasts are gabbroic and basaltic clasts up to 7 mm in size. Dominant minerals are olivine, low-Ca pyroxene, pigeonite, augite, and calcic plagioclase. Minor phases are ilmenite, Ti-bearing chromite, FeS, and kamacite. Some opx-chromite symplectites are present in olivine. The meteorite is highly shocked and plagioclase partly transformed into maskelynite.

Geochemistry: olivine: Fa23.7±3.4 (Fa18.8-28.0, n=12, FeO/MnO=84±10); low-Ca pyroxene: Fs22.5±0.2Wo4.4±0.2 (Fs22.2-22.8Wo4.0-4.6, n=6, FeO/MnO=48±3); pigeonite: Fs32.7±0.9Wo12.7±1.8 (Fs31.7-34.0Wo10.6-15.9, n=6, FeO/MnO=48±3); augite: Fs12.3±1.5Wo39.1±3.4 (Fs11.0-15.2Wo32.6-41.8, n=6, FeO/MnO=37±2); calcic plagioclase: An97.4±0.3 (An96.9-97.8, n=10)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Mar
Mass (g):1000
Pieces:11
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:low
Fayalite (mol%):23.7
Ferrosilite (mol%):22.5; 32.7; 12.3
Wollastonite (mol%):4.4; 12.7; 39.1
Classifier:A. Greshake, MNB
Type spec mass (g):24.3
Type spec location:MNB
Main mass:Hanno Strufe and Ismaily Sidi Mohamed, Erfoud, Morocco
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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