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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
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 222 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 8 Apr 2021
Writeuphelp
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:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2020
Mass (g):80
Pieces:1
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
Finder:anonymous
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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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