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Northwest Africa 13625
Basic information Name: Northwest Africa 13625
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13625
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 54 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 220 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13625 (NWA 13625)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Lunar meteorite (feldspathic breccia)

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

Physical characteristics: Dark-grayish fragment without fusion crust.

Petrography: Feldspathic breccia composed of mineral fragments, basaltic, and impact melt clasts cemented by a mostly shock-melted groundmass. Predominant minerals are calcic plagioclase, olivine, exsolved pyroxene, and pyroxenes showing complex patchy zoning. Minor phases are chromite, ilmenite, and FeS. No metallic was detected. Shock melt frequently shows schlieren and pronounced flow textures.

Geochemistry: olivine: Fa23.7±7.3 (Fa16.9-44.1, FeO/MnO=83±8, n=16); fayalite: Fa80.8±0.1, FeO/MnO=95±2, n=2; low-Ca pyroxene: Fs19.6±0.2Wo3.2±0.7 (Fs19.3-19.8Wo2.2-4.2, FeO/MnO=45±4, n=5); Ca-pyroxene: Fs8.2±0.3Wo44.1±0.8 (Fs7.6-8.6Wo42.8-45.4, FeO/MnO=28±2, n=6); complex zoned pyroxene: Fs38.3±9.6Wo15.4±3.2 (Fs29.2-50.9Wo9.3-18.6, FeO/MnO=55±8, n=5); calcic plagioclase: An96.1±0.8 (An95.2-97.0, n=7)

Classification: Lunar (feldspathic breccia)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Oct
Mass (g):54
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):23.7; 80.8
Ferrosilite (mol%):19.6; 8.2; 38.3
Wollastonite (mol%):3.2; 44.1; 15.3
Classifier:A. Greshake, MNB
Type spec mass (g):10.8
Type spec location:MNB
Main mass:Larbi Chnaoui
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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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