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Northwest Africa 13779
Basic information Name: Northwest Africa 13779
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13779
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 80 g
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 314 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 8 Apr 2021
Writeup from MB 110:

Northwest Africa 13779 (NWA 13779)

(Northwest Africa)

Purchased: 2020

Classification: Lunar meteorite (feldspathic breccia)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in late 2020.

Physical characteristics: Dark grayish rock without fusion crust.

Petrography: Polymict feldspathic breccia composed of lithic clasts (gabbroic, fine-grained subophitic basalts, impact melt up to 5 mm in size) and mineral fragments set in a more fine-grained clastic and partly shock melted matrix. Main minerals are zoned low-Ca pyroxene, augite, olivine, and plagioclase. Minor phases include silica, ferroan olivine, chromite, ilmenite, and FeS. Some cracks are filled with secondary calcite.

Geochemistry: low-Ca pyroxene: Fs20.2±7.0Wo3.3±0.3 (Fs12.7-27.9Wo2.6-3.8, FeO/MnO=51±4, n=10); augite: Fs27.4±11.1Wo37.2±5.9 (Fs216.7-45.1Wo27.8-43.1, FeO/MnO=46±7, n=17); olivine: Fa38.3±2.6, (Fa35.2-40.7, FeO/MnO=88±7, n=9); ferroan olivine: Fa87.8±2.0, (Fa85.6-90.0, FeO/MnO=73±4, n=8); plagioclase: An95.1±4.9 (An85.0-97.7, n=10)

Data from:
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2020
Mass (g):80
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:low
Fayalite (mol%):38.3; 87.8
Ferrosilite (mol%):20.2; 27.4
Wollastonite (mol%):3.3; 37.2
Classifier:A. Greshake, MNB
Type spec mass (g):17
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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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     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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